[{"data":1,"prerenderedAt":3418},["ShallowReactive",2],{"nav-articles":3,"\u002Fhome-backup\u002Fguide":3057,"children-\u002Fhome-backup\u002Fguide":3200,"type-articles-\u002Fhome-backup\u002Fguide":3202},[4,307,616,814,1060,1328,1636,1817,2024,2275,2598,2788],{"id":5,"title":6,"body":7,"date":296,"description":297,"extension":298,"meta":299,"navigation":300,"path":301,"seo":302,"silo":303,"stem":304,"updated":305,"__hash__":306},"content\u002Fhome-backup\u002Fcomparison\u002Fhome-battery-vs-portable-power-station.md","Home Backup Battery vs Portable Power Station",{"type":8,"value":9,"toc":286},"minimark",[10,14,17,28,40,48,51,151,159,162,165,168,182,186,189,197,200,203,211,254,257,274,282],[11,12,13],"p",{},"There is a lot of confusion between a \"home backup battery\" and a \"portable power station,\" partly because marketing blurs the line on purpose. They overlap, but they are aimed at very different problems and budgets. Buy the wrong one and you either overspend by thousands or end up unable to run what you actually care about.",[11,15,16],{},"Here is how I separate them.",[18,19,21,27],"h2",{"id":20},"in-one-sentence",[22,23],"icon",{"className":24,"name":26},[25],"size-6","solar:scale-bold-duotone"," In one sentence",[11,29,30,31,35,36,39],{},"If you want to keep a few essential circuits alive during outages and move the unit around, a ",[32,33,34],"strong",{},"portable power station"," is cheaper, simpler and usually enough. If you want to back up much of your house automatically, including large appliances, and you are staying put, a ",[32,37,38],{},"fixed home backup battery"," is the real answer, at a much higher cost.",[18,41,43,47],{"id":42},"the-honest-head-to-head",[22,44],{"className":45,"name":46},[25],"solar:list-check-bold-duotone"," The honest head-to-head",[11,49,50],{},"Ballpark comparison, not exact figures.",[52,53,54,70],"table",{},[55,56,57],"thead",{},[58,59,60,64,67],"tr",{},[61,62,63],"th",{},"What matters",[61,65,66],{},"Portable power station",[61,68,69],{},"Home backup battery",[71,72,73,85,96,107,118,129,140],"tbody",{},[58,74,75,79,82],{},[76,77,78],"td",{},"Typical capacity",[76,80,81],{},"1 to 5 kWh",[76,83,84],{},"5 to 20+ kWh",[58,86,87,90,93],{},[76,88,89],{},"Install",[76,91,92],{},"Plug and play, none",[76,94,95],{},"Professional, permits, panel work",[58,97,98,101,104],{},[76,99,100],{},"Cost",[76,102,103],{},"Hundreds to low thousands",[76,105,106],{},"Many thousands, often five figures installed",[58,108,109,112,115],{},[76,110,111],{},"Automatic switchover",[76,113,114],{},"No, you plug in",[76,116,117],{},"Yes, transfers instantly",[58,119,120,123,126],{},[76,121,122],{},"Powers large appliances",[76,124,125],{},"Only the biggest units",[76,127,128],{},"Yes, whole circuits",[58,130,131,134,137],{},[76,132,133],{},"Portable",[76,135,136],{},"Yes",[76,138,139],{},"No, wall-mounted",[58,141,142,145,148],{},[76,143,144],{},"Best for",[76,146,147],{},"Renters, essentials, flexibility",[76,149,150],{},"Homeowners, whole-home backup",[18,152,154,158],{"id":153},"where-the-portable-power-station-wins",[22,155],{"className":156,"name":157},[25],"solar:battery-charge-bold-duotone"," Where the portable power station wins",[11,160,161],{},"For most people worried about outages, a large portable station is the pragmatic choice. There is no electrician, no permit, and no five-figure quote. You keep it charged, and when the power drops you plug in a fridge, some lights, the internet and phones. When the outage ends you roll it back into a closet.",[11,163,164],{},"It is also the only option that makes sense if you rent, or if you might move: you own the hardware, not a fixture bolted to a house you may leave.",[11,166,167],{},"The limit is capacity and manual operation. You are powering essentials, not the whole house, and you have to physically plug things in.",[11,169,170,171,176,177,181],{},"Worth being clear about scope here. I am judging these units purely as outage insurance. Everything else they are good at — camping, van life, job sites, weight and portability — belongs to a different decision, and I have covered it separately on the ",[172,173,175],"a",{"href":174},"\u002Fportable-power","portable power station hub",". If backup is a secondary use for you rather than the main one, start there instead, and size it with the ",[172,178,180],{"href":179},"\u002Fportable-power\u002Fguide\u002Fportable-power-station-buying-guide","portable power station buying guide",".",[183,184],"affiliation-box",{"id":185},"bluetti-ac200l",[183,187],{"id":188},"anker-solix-f3800",[18,190,192,196],{"id":191},"where-the-home-backup-battery-wins",[22,193],{"className":194,"name":195},[25],"solar:home-2-bold-duotone"," Where the home backup battery wins",[11,198,199],{},"If you want the lights, the fridge, the AC and the well pump to simply keep working when the grid fails, without you doing anything, a fixed battery tied into your panel is what delivers that. It switches over automatically in a fraction of a second, holds far more energy, and can be paired with rooftop solar to recharge through a long outage.",[11,201,202],{},"That capability costs real money. You are looking at professional installation, permits, and a total that often reaches five figures. It is a house upgrade, not a purchase you make on a whim.",[18,204,206,210],{"id":205},"how-to-decide",[22,207],{"className":208,"name":209},[25],"solar:hand-stars-bold-duotone"," How to decide",[212,213,214,221,227,233,243],"ul",{},[215,216,217,220],"li",{},[32,218,219],{},"You rent, or want flexibility."," Portable power station, easily.",[215,222,223,226],{},[32,224,225],{},"You just need essentials through outages."," A large portable station covers it for far less money.",[215,228,229,232],{},[32,230,231],{},"You own the home and want hands-off whole-home backup."," Fixed home battery.",[215,234,235,238,239,181],{},[32,236,237],{},"You already have or plan rooftop solar."," A home battery pairs naturally with it; size it with the ",[172,240,242],{"href":241},"\u002Fhome-backup\u002Fguide\u002Fhome-battery-backup-sizing-guide","home battery sizing guide",[215,244,245,248,249,253],{},[32,246,247],{},"You are not sure how long any battery would last you."," Run your loads through the ",[172,250,252],{"href":251},"\u002Fhome-backup\u002Ftool\u002Fhome-battery-blackout-runtime-calculator","blackout runtime calculator"," first.",[11,255,256],{},"My honest advice: most people asking this question actually want the portable route and are surprised to learn how much whole-home backup costs. Start by listing what you truly need to keep running. Often it is a fridge, internet, phones and a few lights, and a large portable station handles that for a fraction of the price.",[11,258,259,260,264,265,269,270,181],{},"This comparison is really a question about which rung of the ladder you're on, and there are four of them rather than two — they're laid out on ",[172,261,263],{"href":262},"\u002Fhome-backup","the home backup hub",", along with the connection methods that drive most of the cost difference. More head-to-heads are in ",[172,266,268],{"href":267},"\u002Fhome-backup\u002Fcomparison","my home backup comparisons",", and verdicts on specific systems in ",[172,271,273],{"href":272},"\u002Fhome-backup\u002Freview","my home backup reviews",[18,275,277,281],{"id":276},"frequently-asked-questions",[22,278],{"className":279,"name":280},[25],"solar:question-circle-bold-duotone"," Frequently asked questions",[283,284],"faq",{":items":285},"[{\"q\":\"Can a portable power station back up my whole house?\",\"a\":\"Not really. It powers essentials you plug into it, like a fridge, internet and lights. Whole-home backup with automatic switchover and large appliances needs a fixed home battery wired into your electrical panel.\"},{\"q\":\"Is a home backup battery worth the cost?\",\"a\":\"It depends on how much you value hands-off, whole-home backup and whether you pair it with solar. For essentials-only backup, a large portable station delivers most of the benefit for a fraction of the price.\",\"href\":\"\u002Fhome-backup\u002Fguide\u002Fhome-battery-backup-sizing-guide\",\"linkText\":\"See how to size home backup\"},{\"q\":\"Do I need an electrician for a portable power station?\",\"a\":\"No. Portable stations are plug and play. You only need an electrician for a fixed home battery, which requires permits and panel work.\"},{\"q\":\"How long will either option run my house?\",\"a\":\"That depends on capacity and your loads. A portable station covers essentials for hours to a day or two; a large home battery can cover more circuits for longer, especially with solar recharging. Use the runtime calculator to estimate your case.\",\"href\":\"\u002Fhome-backup\u002Ftool\u002Fhome-battery-blackout-runtime-calculator\",\"linkText\":\"Estimate runtime\"}]",{"title":287,"searchDepth":288,"depth":288,"links":289},"",2,[290,291,292,293,294,295],{"id":20,"depth":288,"text":27},{"id":42,"depth":288,"text":47},{"id":153,"depth":288,"text":158},{"id":191,"depth":288,"text":196},{"id":205,"depth":288,"text":210},{"id":276,"depth":288,"text":281},"2026-07-13","Home backup battery or portable power station? I compare cost, install, capacity and what each one actually keeps running, so you buy the right level of backup.","md",{},true,"\u002Fhome-backup\u002Fcomparison\u002Fhome-battery-vs-portable-power-station",{"title":6,"description":297},"home-backup","home-backup\u002Fcomparison\u002Fhome-battery-vs-portable-power-station","2026-08-10","LAo9dHFazzdamliDoZYR8D6cAvEuKSbNDsMn5ryiL38",{"id":308,"title":309,"body":310,"date":296,"description":611,"extension":298,"meta":612,"navigation":300,"path":241,"seo":613,"silo":303,"stem":614,"updated":305,"__hash__":615},"content\u002Fhome-backup\u002Fguide\u002Fhome-battery-backup-sizing-guide.md","How to Size a Home Battery Backup (Without Overpaying)",{"type":8,"value":311,"toc":602},[312,315,318,326,337,345,348,368,374,382,385,388,465,472,479,482,487,498,509,514,522,548,556,559,570,573,576,594,599],[11,313,314],{},"Battery sizing is where most home backup budgets go wrong. People get quoted for a system twice as big as they need because nobody asked the simple question first: what are you actually trying to keep running, and for how long? Answer that, and the right size, and price, falls out naturally.",[11,316,317],{},"This guide walks through that math in plain terms so you buy the backup you need and not the one that pads someone's commission.",[18,319,321,325],{"id":320},"who-this-guide-is-for",[22,322],{"className":323,"name":324},[25],"solar:user-check-bold-duotone"," Who this guide is for",[212,327,328,331,334],{},[215,329,330],{},"You are considering a home battery, a large portable station, or a solar-plus-storage setup.",[215,332,333],{},"You want to right-size it rather than trust a sales quote.",[215,335,336],{},"You are comfortable doing a little back-of-envelope math (I will keep it easy).",[18,338,340,344],{"id":339},"step-1-decide-what-you-are-backing-up",[22,341],{"className":342,"name":343},[25],"solar:target-bold-duotone"," Step 1: Decide what you are backing up",[11,346,347],{},"This is the fork that changes everything. Be honest about which one you actually want:",[212,349,350,356,362],{},[215,351,352,355],{},[32,353,354],{},"Essentials only:"," fridge, internet, phones, a few lights, maybe a CPAP machine. This is what most people really need, and it fits a large portable station or a small home battery.",[215,357,358,361],{},[32,359,360],{},"Essentials plus comfort:"," add a microwave, some outlets, a small window AC. Mid-size battery territory.",[215,363,364,367],{},[32,365,366],{},"Whole-home:"," central AC, well pump, electric range, everything. This needs a large fixed battery, real money, and usually solar to back it.",[11,369,370,371,181],{},"If you are torn between a portable unit and a fixed battery, I compared them in ",[172,372,373],{"href":301},"home battery vs portable power station",[18,375,377,381],{"id":376},"step-2-add-up-your-daily-backup-energy-kwh",[22,378],{"className":379,"name":380},[25],"solar:calculator-bold-duotone"," Step 2: Add up your daily backup energy (kWh)",[11,383,384],{},"You size a battery in kilowatt-hours (kWh), which is just watt-hours divided by 1000. For each thing you want to run, estimate its energy per day: its average watts times the hours it runs, then add them up.",[11,386,387],{},"Rough daily figures to start from:",[52,389,390,400],{},[55,391,392],{},[58,393,394,397],{},[61,395,396],{},"Load",[61,398,399],{},"Rough energy per day in backup",[71,401,402,410,418,425,433,441,449,457],{},[58,403,404,407],{},[76,405,406],{},"Fridge (cycling)",[76,408,409],{},"1 to 2 kWh",[58,411,412,415],{},[76,413,414],{},"Internet router and modem",[76,416,417],{},"0.2 to 0.5 kWh",[58,419,420,423],{},[76,421,422],{},"Phone and laptop charging",[76,424,417],{},[58,426,427,430],{},[76,428,429],{},"Lights (LED, a few rooms)",[76,431,432],{},"0.3 to 0.6 kWh",[58,434,435,438],{},[76,436,437],{},"CPAP machine (no humidifier heat)",[76,439,440],{},"0.3 to 0.5 kWh",[58,442,443,446],{},[76,444,445],{},"Microwave (occasional)",[76,447,448],{},"0.2 to 0.4 kWh",[58,450,451,454],{},[76,452,453],{},"Window AC (small, part-time)",[76,455,456],{},"2 to 5 kWh",[58,458,459,462],{},[76,460,461],{},"Well pump (intermittent)",[76,463,464],{},"1 to 3 kWh",[11,466,467,468,471],{},"Essentials only (fridge, internet, phones, lights) usually lands around ",[32,469,470],{},"2 to 4 kWh per day",". Add comfort items and you climb quickly. Add AC or a well pump and you can double or triple it.",[18,473,475,478],{"id":474},"step-3-multiply-by-days-of-autonomy",[22,476],{"className":477,"name":157},[25]," Step 3: Multiply by days of autonomy",[11,480,481],{},"Decide how long you want to ride out an outage on battery alone:",[11,483,484],{},[32,485,486],{},"Battery size needed (kWh) = daily backup energy x days of autonomy \u002F usable depth",[212,488,489,492,495],{},[215,490,491],{},"Most outages are short, so one day of autonomy is a sensible baseline.",[215,493,494],{},"\"Usable depth\" matters: you rarely get 100% of rated capacity. Plan for about 80 to 90% usable depending on the system.",[215,496,497],{},"If you have solar to recharge each day, you can size for less battery, because the sun refills it. Without solar, a long outage simply drains whatever you bought.",[11,499,500,501,504,505,508],{},"So essentials at ~3 kWh\u002Fday for one day, at ~85% usable, is roughly a ",[32,502,503],{},"3.5 kWh"," battery. Two days without solar, roughly ",[32,506,507],{},"7 kWh",". That is a very different quote from the 13 kWh unit someone might try to sell you \"to be safe.\"",[11,510,511,512,181],{},"Want to sanity-check runtime for a specific battery size and load set? Run it through the ",[172,513,252],{"href":251},[18,515,517,521],{"id":516},"common-mistakes-i-see",[22,518],{"className":519,"name":520},[25],"solar:danger-triangle-bold-duotone"," Common mistakes I see",[212,523,524,530,536,542],{},[215,525,526,529],{},[32,527,528],{},"Sizing for whole-home when you only need essentials."," The single most expensive mistake. Most people are fine backing up four or five things.",[215,531,532,535],{},[32,533,534],{},"Forgetting usable depth."," Rated capacity is not all deliverable. Build in headroom.",[215,537,538,541],{},[32,539,540],{},"Ignoring surge on motors."," A well pump or AC compressor spikes hard at startup. The battery's power output (kW), not just its capacity (kWh), has to handle that.",[215,543,544,547],{},[32,545,546],{},"Buying battery instead of solar."," Without solar, a long outage still ends when the battery is empty. If outages in your area last days, pairing with solar often beats simply buying more battery.",[18,549,551,555],{"id":550},"my-honest-take",[22,552],{"className":553,"name":554},[25],"solar:heart-bold-duotone"," My honest take",[11,557,558],{},"For most homes, \"essentials for one day\" is the honest target, and it is a lot smaller and cheaper than the default quote. Start there. Size up only if you have named the extra loads and accept the cost. And if outages in your region routinely last multiple days, put money into solar recharging before you put it into an oversized battery.",[11,560,561,562,565,566,181],{},"Once you have a target kWh, compare formats in the ",[172,563,564],{"href":301},"home battery vs portable station comparison",", and if you are eyeing a large plug-in unit, see the ",[172,567,569],{"href":568},"\u002Fhome-backup\u002Freview\u002Fecoflow-delta-pro-ultra-review","EcoFlow Delta Pro Ultra review",[183,571],{"id":572},"anker-solix-f3800-plus",[183,574],{"id":575},"ecoflow-delta-pro-3",[11,577,578,579,581,582,586,587,589,590,181],{},"Sizing is only half the decision. The other half is how the power reaches your circuits, which is what actually separates the four levels of backup — that's on ",[172,580,263],{"href":262},". More step-by-step guidance is in ",[172,583,585],{"href":584},"\u002Fhome-backup\u002Fguide","my home backup buying guides",", verdicts on specific systems in ",[172,588,273],{"href":272},", and the scoring method in ",[172,591,593],{"href":592},"\u002Frating-methodology","how I rate products",[18,595,596,281],{"id":276},[22,597],{"className":598,"name":280},[25],[283,600],{":items":601},"[{\"q\":\"What size battery do I need to back up my house?\",\"a\":\"It depends on what you back up. Essentials like a fridge, internet, phones and lights need roughly 2 to 4 kWh per day, so a 3 to 4 kWh battery covers a day. Whole-home with AC or a well pump can need 10 kWh or more per day.\",\"href\":\"\u002Fhome-backup\u002Ftool\u002Fhome-battery-blackout-runtime-calculator\",\"linkText\":\"Estimate your runtime\"},{\"q\":\"How many kWh do I need for a fridge and essentials?\",\"a\":\"A fridge uses about 1 to 2 kWh per day, and adding internet, phone charging and a few lights brings essentials to roughly 2 to 4 kWh per day. Size the battery to cover the number of days you want without recharging.\"},{\"q\":\"Should I get a bigger battery just to be safe?\",\"a\":\"Usually no. Oversizing is the most common way people overpay. Size for your real loads and desired autonomy, and if you worry about multi-day outages, add solar recharging rather than simply buying more battery.\"},{\"q\":\"Does solar change how big a battery I need?\",\"a\":\"Yes. With solar recharging the battery each day, you can size for less storage because the sun refills it. Without solar, a long outage drains whatever capacity you bought and that is it.\"}]",{"title":287,"searchDepth":288,"depth":288,"links":603},[604,605,606,607,608,609,610],{"id":320,"depth":288,"text":325},{"id":339,"depth":288,"text":344},{"id":376,"depth":288,"text":381},{"id":474,"depth":288,"text":478},{"id":516,"depth":288,"text":521},{"id":550,"depth":288,"text":555},{"id":276,"depth":288,"text":281},"How to size a home battery backup without wasting money. Work out your real backup loads in kWh, pick essentials vs whole-home, and avoid the oversizing trap.",{},{"title":309,"description":611},"home-backup\u002Fguide\u002Fhome-battery-backup-sizing-guide","Ms9QXW-6VaAnKujSUG5F77HX5FnBWwvpu-yjS0yZHT4",{"id":617,"title":618,"body":619,"date":296,"description":809,"extension":298,"meta":810,"navigation":300,"path":568,"seo":811,"silo":303,"stem":812,"updated":305,"__hash__":813},"content\u002Fhome-backup\u002Freview\u002Fecoflow-delta-pro-ultra-review.md","EcoFlow Delta Pro Ultra Review: Whole-Home Backup",{"type":8,"value":620,"toc":792},[621,624,627,635,667,670,678,683,686,690,693,697,700,703,711,715,718,722,728,732,735,742,758,766,769,772,784,789],[11,622,623],{},"The EcoFlow Delta Pro Ultra pitches itself as whole-home backup you can buy off the shelf and expand over time, positioned against fixed installations like the Tesla Powerwall. That's a bold claim, and it's the one worth testing.",[11,625,626],{},"I bought this system and put it into service at home. What follows separates the manufacturer's published architecture from what I found living with it.",[18,628,630,634],{"id":629},"what-it-is-in-plain-terms",[22,631],{"className":632,"name":633},[25],"solar:clipboard-list-bold-duotone"," What it is, in plain terms",[212,636,637,643,649,655,661],{},[215,638,639,642],{},[32,640,641],{},"Modular capacity:"," each battery adds several kWh, and the system stacks into the tens of kWh as you add units and inverters.",[215,644,645,648],{},[32,646,647],{},"High output:"," rated to run large household loads, with surge headroom for motors.",[215,650,651,654],{},[32,652,653],{},"Whole-home capable:"," works with a transfer setup, so it backs up circuits rather than only plugged-in devices.",[215,656,657,660],{},[32,658,659],{},"Large solar input:"," accepts enough solar to genuinely recharge during an extended outage.",[215,662,663,666],{},[32,664,665],{},"Chemistry:"," LiFePO4, which is what you want in something this expensive.",[11,668,669],{},"The core idea is appealing: start with what you can afford, expand later, and avoid committing to a fixed box sized years in advance. Where that idea holds up — and where it doesn't — is the whole review.",[18,671,673,677],{"id":672},"what-holds-up",[22,674],{"className":675,"name":676},[25],"solar:like-bold-duotone"," What holds up",[679,680,682],"h3",{"id":681},"staged-expansion-is-a-real-advantage","Staged expansion is a real advantage",[11,684,685],{},"Buying storage in stages genuinely fits how people adopt backup. You're not forced to size and pay for everything up front, and you can respond to what you learn from your first real outage rather than guessing beforehand.",[679,687,689],{"id":688},"it-recharges-instead-of-just-depleting","It recharges instead of just depleting",[11,691,692],{},"The large solar input is the specification that separates this from a big battery. In a multi-day outage, a system that refills is a categorically different thing from one that empties — this is the capability I'd prioritise if I were buying again, and it's the one most often confused with simply being solar-compatible.",[679,694,696],{"id":695},"output-that-doesnt-flinch","Output that doesn't flinch",[11,698,699],{},"It runs the heavy loads that portable stations choke on. Motor startup, the thing that quietly defeats smaller inverters, is a non-event here.",[183,701],{"id":702},"ecoflow-delta-pro-ultra",[18,704,706,710],{"id":705},"what-to-be-honest-about",[22,707],{"className":708,"name":709},[25],"solar:dislike-bold-duotone"," What to be honest about",[679,712,714],{"id":713},"the-cost-is-serious-and-so-is-the-weight","The cost is serious, and so is the weight",[11,716,717],{},"Approaching whole-home capacity means a serious total, and each unit is genuinely heavy. This is a major purchase and a two-person installation job, even where it undercuts a fixed install.",[679,719,721],{"id":720},"whole-home-still-needs-an-electrician","\"Whole-home\" still needs an electrician",[11,723,724,725,181],{},"Backing up real circuits means a transfer switch or smart panel, and realistically a licensed electrician. It's more off-the-shelf than a wall battery, but the marketing implies less setup than the reality — budget for the electrical work as part of the price, not as an afterthought. What each connection method involves is covered on the ",[172,726,727],{"href":262},"home backup hub",[679,729,731],{"id":730},"its-a-lot-of-hardware-to-house","It's a lot of hardware to house",[11,733,734],{},"A stacked multi-battery system takes real floor space and has meaningfully more to configure than a single portable unit. Worth measuring the space before ordering, which I say from experience.",[18,736,738,741],{"id":737},"who-its-for",[22,739],{"className":740,"name":343},[25]," Who it's for",[212,743,744,750],{},[215,745,746,749],{},[32,747,748],{},"Good fit:"," a homeowner who wants large, expandable backup with strong solar recharging, values buying in stages, and wants an alternative to a single fixed installation.",[215,751,752,755,756,181],{},[32,753,754],{},"Look elsewhere if:"," you only need to keep essentials running. A large portable station does that for a fraction of the price — see ",[172,757,373],{"href":301},[18,759,761,765],{"id":760},"verdict",[22,762],{"className":763,"name":764},[25],"solar:check-square-bold-duotone"," Verdict",[11,767,768],{},"As expandable, high-output, solar-friendly backup that competes with fixed installations, this is one of the more compelling options in its class. The fundamentals are right: LFP chemistry, real output, big solar input, staged expansion.",[11,770,771],{},"The honest caveats are cost, weight, and the fact that true whole-home use still needs proper electrical integration — which means the gap to a fixed install is smaller than the marketing suggests.",[11,773,774,775,777,778,781,782,181],{},"If you genuinely want to back up most of a house and like growing the system over time, it belongs on your shortlist. If your real need is essentials only, size that first with the ",[172,776,242],{"href":241},", because you may be about to overbuy by a large margin. More verdicts are in ",[172,779,780],{"href":272},"my home backup battery reviews",", and the scoring method is in ",[172,783,593],{"href":592},[18,785,786,281],{"id":276},[22,787],{"className":788,"name":280},[25],[283,790],{":items":791},"[{\"q\":\"Is the EcoFlow Delta Pro Ultra a good alternative to a Powerwall?\",\"a\":\"For many households, yes. It offers large expandable capacity, strong output and big solar input without a fully fixed installation, and it can undercut some installed systems. True whole-home backup still requires a transfer switch or smart panel and usually an electrician, so the gap in total effort is smaller than it first appears.\"},{\"q\":\"Can the Delta Pro Ultra really back up a whole house?\",\"a\":\"It has the capacity and output for large loads and expands into the tens of kilowatt-hours. Backing up actual house circuits requires proper integration hardware, so plan for that rather than expecting plug-and-play operation at whole-home scale.\"},{\"q\":\"Does it use LiFePO4 batteries?\",\"a\":\"Yes. It uses LiFePO4 chemistry, which is what you want in an expensive system expected to last many years, though in backup duty a battery typically ages out long before it cycles out.\"},{\"q\":\"Is it overkill for backing up just a fridge and essentials?\",\"a\":\"Almost certainly. If you only need essentials, a large portable power station delivers that for a fraction of the cost. Size your real loads before committing to a system this large, because the difference runs to thousands.\",\"href\":\"\u002Fhome-backup\u002Ftool\u002Fhome-battery-blackout-runtime-calculator\",\"linkText\":\"Check what you actually need\"}]",{"title":287,"searchDepth":288,"depth":288,"links":793},[794,795,801,806,807,808],{"id":629,"depth":288,"text":634},{"id":672,"depth":288,"text":677,"children":796},[797,799,800],{"id":681,"depth":798,"text":682},3,{"id":688,"depth":798,"text":689},{"id":695,"depth":798,"text":696},{"id":705,"depth":288,"text":710,"children":802},[803,804,805],{"id":713,"depth":798,"text":714},{"id":720,"depth":798,"text":721},{"id":730,"depth":798,"text":731},{"id":737,"depth":288,"text":741},{"id":760,"depth":288,"text":765},{"id":276,"depth":288,"text":281},"My EcoFlow Delta Pro Ultra review: expandable kWh, whole-home output and big solar input, versus a fixed wall battery. What it costs you, and who should skip it.",{},{"title":618,"description":809},"home-backup\u002Freview\u002Fecoflow-delta-pro-ultra-review","LgRmoTCxvFSHCc8DowgEB9UezB5D5PD7SAbAIpuOSaY",{"id":815,"title":816,"body":817,"date":296,"description":1055,"extension":298,"meta":1056,"navigation":300,"path":251,"seo":1057,"silo":303,"stem":1058,"updated":305,"__hash__":1059},"content\u002Fhome-backup\u002Ftool\u002Fhome-battery-blackout-runtime-calculator.md","Blackout Runtime Calculator: How Long Will a Home Battery Last?",{"type":8,"value":818,"toc":1040},[819,822,825,830,837,840,844,851,855,858,862,865,869,872,879,887,890,976,979,986,989,992,996,999,1003,1006,1009,1011,1013,1016,1032,1037],[11,820,821],{},"When the grid goes down, the only number that matters is how long your battery keeps the important things alive — all of them, at the same time. Product pages quote big kWh figures but rarely translate them into \"your essentials last until morning.\" This does.",[11,823,824],{},"Pick a battery capacity and a load below to get a realistic estimate, then read on for how to handle several appliances at once, which is the part that makes outage planning different.",[826,827],"autonomy-calculator",{":capacity":828,"cta-to":241,"cta-label":829},"3600","See the full sizing guide",[18,831,833,836],{"id":832},"why-an-outage-isnt-a-single-appliance-test",[22,834],{"className":835,"name":520},[25]," Why an outage isn't a single-appliance test",[11,838,839],{},"Running one device off a battery is arithmetic. Surviving an outage is a different problem, and four things make it so.",[679,841,843],{"id":842},"loads-overlap-but-never-perfectly","Loads overlap, but never perfectly",[11,845,846,847,850],{},"Add up the nameplate wattage of everything you want to keep running and you'll get a frightening number that never occurs. The fridge compressor and the furnace fan rarely start together, and neither runs continuously. ",[32,848,849],{},"Sum the average draws over the outage, not the peak ratings."," An essentials bundle — fridge, internet, a few lights, phone charging — typically averages a couple of hundred watts, which is why a mid-size battery stretches further than people fear.",[679,852,854],{"id":853},"the-overnight-window-is-the-real-question","The overnight window is the real question",[11,856,857],{},"Most outages are survived rather than lived through. What you need to know is whether the battery carries you from dinner to breakfast, not how many hours it could theoretically sustain a fixed load. Size against that window and you'll make a much better decision than sizing against a number of hours.",[679,859,861],{"id":860},"motor-startup-decides-what-runs-at-all","Motor startup decides what runs at all",[11,863,864],{},"Fridges, furnace fans, well pumps and sump pumps spike hard for a fraction of a second when their motors start. That spike barely affects runtime, but it determines whether the appliance starts — and no runtime figure will warn you about it. It's a question about the inverter's surge rating, not the battery's capacity.",[679,866,868],{"id":867},"winter-is-when-it-matters-and-when-you-have-least","Winter is when it matters and when you have least",[11,870,871],{},"Outages cluster in bad weather, batteries hold less when cold, and heating loads rise at the same time. Plan for the season you'll actually need it in, not for a mild evening.",[11,873,874,875,181],{},"If what you want instead is the underlying single-appliance formula, with the loss and duty-cycle corrections spelled out, it's on the ",[172,876,878],{"href":877},"\u002Fportable-power\u002Ftool\u002Fpower-station-runtime-calculator","power station runtime calculator",[18,880,882,886],{"id":881},"rough-runtime-by-battery-size",[22,883],{"className":884,"name":885},[25],"solar:chart-2-bold-duotone"," Rough runtime by battery size",[11,888,889],{},"Ballpark figures for common essential loads, losses included.",[52,891,892,908],{},[55,893,894],{},[58,895,896,899,902,905],{},[61,897,898],{},"Load (average draw)",[61,900,901],{},"1 kWh",[61,903,904],{},"3.6 kWh",[61,906,907],{},"10 kWh",[71,909,910,924,936,949,962],{},[58,911,912,915,918,921],{},[76,913,914],{},"Internet (router + modem, ~20W)",[76,916,917],{},"~2 days",[76,919,920],{},"~1 week",[76,922,923],{},"very long",[58,925,926,929,932,934],{},[76,927,928],{},"Fridge (cycling, ~60W avg)",[76,930,931],{},"~14 h",[76,933,917],{},[76,935,920],{},[58,937,938,941,944,947],{},[76,939,940],{},"Essentials bundle (fridge + internet + lights + phones, ~180W avg)",[76,942,943],{},"~5 h",[76,945,946],{},"~17 h",[76,948,917],{},[58,950,951,954,957,960],{},[76,952,953],{},"Window AC (small, ~500W avg part-time)",[76,955,956],{},"~1.7 h",[76,958,959],{},"~6 h",[76,961,946],{},[58,963,964,967,970,973],{},[76,965,966],{},"Well pump (intermittent, ~300W avg)",[76,968,969],{},"~3 h",[76,971,972],{},"~10 h",[76,974,975],{},"~28 h",[11,977,978],{},"Two things jump out. Essentials alone stretch a long way, which is why most people need less battery than they fear. And anything with a compressor — air conditioning, a well pump — eats capacity fast, which is exactly why whole-home backup gets expensive.",[18,980,982,985],{"id":981},"what-the-numbers-usually-tell-people",[22,983],{"className":984,"name":209},[25]," What the numbers usually tell people",[679,987,901],{"id":988},"_1-kwh",[11,990,991],{},"Internet, phones and a fridge for a while. Fine for a short outage, or for a renter covering the basics.",[679,993,995],{"id":994},"_3-to-5-kwh","3 to 5 kWh",[11,997,998],{},"The practical sweet spot: essentials through a full day without recharging. This is where most households should land.",[679,1000,1002],{"id":1001},"_10-kwh-and-up","10 kWh and up",[11,1004,1005],{},"Longer autonomy or larger loads, and worth having only if paired with solar so it refills each day rather than simply draining once.",[183,1007],{"id":1008},"anker-solix-c1000",[183,1010],{"id":185},[183,1012],{"id":575},[11,1014,1015],{},"If the runtime you're seeing is shorter than you want, the honest fix is usually solar recharging rather than a much bigger battery — a battery that refills each day effectively runs indefinitely in good weather, while a larger one only postpones the same problem.",[11,1017,1018,1019,1021,1022,1024,1025,1029,1030,181],{},"Size it properly with the ",[172,1020,242],{"href":241},", and if you're still unsure whether to go fixed or portable, read ",[172,1023,373],{"href":301},". More tools are in ",[172,1026,1028],{"href":1027},"\u002Fhome-backup\u002Ftool","the home backup calculators",", and the four levels of backup are laid out on ",[172,1031,263],{"href":262},[18,1033,1034,281],{"id":276},[22,1035],{"className":1036,"name":280},[25],[283,1038],{":items":1039},"[{\"q\":\"How long will a home battery power my house during an outage?\",\"a\":\"It depends on the battery size and which loads you keep running. Roughly, a 3.6 kWh battery carries an essentials bundle of fridge, internet, lights and phone charging for most of a day. Add air conditioning or a well pump and it drops sharply, because compressors draw heavily.\"},{\"q\":\"How long will a 10kWh battery last in a blackout?\",\"a\":\"For essentials averaging a couple of hundred watts, roughly a day or two. For a fridge on its own, around a week. For heavy loads such as air conditioning, far less. The appliance list matters much more than the capacity figure.\"},{\"q\":\"How do I calculate several appliances running at once?\",\"a\":\"Add together their average draws rather than their peak ratings, then divide usable capacity by that total. Using nameplate wattages produces a number far worse than reality, because appliances that cycle spend most of their time idle and rarely all run at the same moment.\",\"href\":\"\u002Fhome-backup\u002Fguide\u002Fhome-battery-backup-sizing-guide\",\"linkText\":\"Build your load list\"},{\"q\":\"Should I buy a bigger battery or add solar for longer outages?\",\"a\":\"For multi-day outages, adding solar usually beats buying more battery, because it refills the store each day instead of just making it larger. The system does need to support charging while disconnected from the grid, which is a specific capability worth confirming rather than assuming.\"}]",{"title":287,"searchDepth":288,"depth":288,"links":1041},[1042,1048,1049,1054],{"id":832,"depth":288,"text":836,"children":1043},[1044,1045,1046,1047],{"id":842,"depth":798,"text":843},{"id":853,"depth":798,"text":854},{"id":860,"depth":798,"text":861},{"id":867,"depth":798,"text":868},{"id":881,"depth":288,"text":886},{"id":981,"depth":288,"text":985,"children":1050},[1051,1052,1053],{"id":988,"depth":798,"text":901},{"id":994,"depth":798,"text":995},{"id":1001,"depth":798,"text":1002},{"id":276,"depth":288,"text":281},"Free blackout runtime calculator. See how long a home battery keeps your fridge, internet, lights and essentials running at once through an outage.",{},{"title":816,"description":1055},"home-backup\u002Ftool\u002Fhome-battery-blackout-runtime-calculator","4dvoCfmTa7tbKIpIGeFGOpb4LEBR4tWrl8utdH0_ZkM",{"id":1061,"title":1062,"body":1063,"date":296,"description":1321,"extension":298,"meta":1322,"navigation":300,"path":1323,"seo":1324,"silo":1325,"stem":1326,"updated":305,"__hash__":1327},"content\u002Foff-grid-diy\u002Fcomparison\u002Fmppt-vs-pwm-charge-controller.md","MPPT vs PWM Charge Controllers: Which Do You Actually Need?",{"type":8,"value":1064,"toc":1312},[1065,1068,1071,1076,1087,1095,1098,1112,1117,1120,1199,1206,1209,1212,1215,1218,1226,1229,1232,1237,1273,1276,1298,1304,1309],[11,1066,1067],{},"The charge controller is the least glamorous part of a DIY solar setup and the one people get wrong most often. The whole debate comes down to two letters: MPPT or PWM. Get it right and you harvest more of your panels' output for years. Get it wrong and you either waste power or waste money.",[11,1069,1070],{},"Here is the honest version, without the forum tribalism.",[18,1072,1073,27],{"id":20},[22,1074],{"className":1075,"name":26},[25],[11,1077,1078,1079,1082,1083,1086],{},"Use ",[32,1080,1081],{},"MPPT"," for anything but the smallest systems, especially when your panel voltage is higher than your battery voltage. Use a cheap ",[32,1084,1085],{},"PWM"," only for tiny, low-cost setups where the panel and battery voltages already match closely and every dollar counts.",[18,1088,1090,1094],{"id":1089},"what-each-one-actually-does",[22,1091],{"className":1092,"name":1093},[25],"solar:info-circle-bold-duotone"," What each one actually does",[11,1096,1097],{},"A charge controller sits between your solar panels and your battery, and its job is to feed the battery safely. The difference is how they handle the gap between panel voltage and battery voltage.",[212,1099,1100,1106],{},[215,1101,1102,1105],{},[32,1103,1104],{},"PWM (Pulse Width Modulation)"," basically pulls your panel voltage down to the battery voltage. Anything above that is lost. It is simple and cheap, but only efficient when the panel and battery voltages are already close.",[215,1107,1108,1111],{},[32,1109,1110],{},"MPPT (Maximum Power Point Tracking)"," actively finds the panel's optimal voltage and converts the excess voltage into extra current. In plain terms, it recovers energy PWM throws away, often 15 to 30% more harvest, and even more in cold weather or when panel voltage is much higher than battery voltage.",[18,1113,1114,47],{"id":42},[22,1115],{"className":1116,"name":46},[25],[11,1118,1119],{},"Ballpark comparison.",[52,1121,1122,1132],{},[55,1123,1124],{},[58,1125,1126,1128,1130],{},[61,1127,63],{},[61,1129,1085],{},[61,1131,1081],{},[71,1133,1134,1144,1155,1166,1177,1188],{},[58,1135,1136,1138,1141],{},[76,1137,100],{},[76,1139,1140],{},"Cheap",[76,1142,1143],{},"2 to 4x more",[58,1145,1146,1149,1152],{},[76,1147,1148],{},"Harvest efficiency",[76,1150,1151],{},"Lower, loses excess voltage",[76,1153,1154],{},"15 to 30%+ more in typical use",[58,1156,1157,1160,1163],{},[76,1158,1159],{},"Panel vs battery voltage",[76,1161,1162],{},"Must be closely matched",[76,1164,1165],{},"Handles high panel voltage well",[58,1167,1168,1171,1174],{},[76,1169,1170],{},"Best system size",[76,1172,1173],{},"Very small (a few hundred watts or less)",[76,1175,1176],{},"Small to large",[58,1178,1179,1182,1185],{},[76,1180,1181],{},"Wiring flexibility",[76,1183,1184],{},"Limited",[76,1186,1187],{},"Can run panels in series, thinner wire",[58,1189,1190,1193,1196],{},[76,1191,1192],{},"Cold-weather gain",[76,1194,1195],{},"None",[76,1197,1198],{},"Extra, panels make more voltage when cold",[18,1200,1202,1205],{"id":1201},"where-mppt-wins",[22,1203],{"className":1204,"name":157},[25]," Where MPPT wins",[11,1207,1208],{},"For almost any real off-grid setup, MPPT is the right call. The extra harvest pays for the higher price surprisingly fast, and it lets you wire panels in series to a higher voltage, which means thinner, cheaper cable over a run and better performance on cold, clear days when panels produce more voltage.",[11,1210,1211],{},"If you are sizing a system with 200W of panels or more, or your panels output a noticeably higher voltage than your battery, MPPT is not a luxury, it is where your money should go.",[183,1213],{"id":1214},"victron-smartsolar-100-30",[183,1216],{"id":1217},"renogy-rover-40a",[18,1219,1221,1225],{"id":1220},"where-pwm-is-still-fine",[22,1222],{"className":1223,"name":1224},[25],"solar:hand-money-bold-duotone"," Where PWM is still fine",[11,1227,1228],{},"PWM is not junk. For a tiny system, say a single small panel keeping a 12V battery topped up for a gate opener, a trickle charger, or a very small light setup, a PWM controller is cheap, reliable and good enough. If the panel voltage already sits close to the battery voltage, the efficiency gap shrinks and the price saving may be worth it.",[11,1230,1231],{},"The mistake is using PWM on a system big enough that the lost harvest, every day for years, quietly costs more than the MPPT controller you skipped.",[18,1233,1234,210],{"id":205},[22,1235],{"className":1236,"name":209},[25],[212,1238,1239,1245,1251,1257,1263],{},[215,1240,1241,1244],{},[32,1242,1243],{},"System of 200W or more:"," MPPT.",[215,1246,1247,1250],{},[32,1248,1249],{},"Panel voltage much higher than battery voltage:"," MPPT, no question.",[215,1252,1253,1256],{},[32,1254,1255],{},"Cold climate:"," MPPT captures the cold-weather voltage bump.",[215,1258,1259,1262],{},[32,1260,1261],{},"Tiny, cheap, voltage-matched trickle setup:"," PWM is fine.",[215,1264,1265,1268,1269,181],{},[32,1266,1267],{},"Not sure how big your system should be:"," work that out first in the ",[172,1270,1272],{"href":1271},"\u002Foff-grid-diy\u002Fguide\u002Foff-grid-solar-sizing-guide","off-grid solar sizing guide",[11,1274,1275],{},"My rule of thumb: unless you are building something genuinely tiny, budget for MPPT and move on. The harvest you gain usually outweighs the price within a season or two, and it opens up better wiring options for the rest of the build.",[11,1277,1278,1279,1283,1284,1288,1289,1293,1294,181],{},"The controller is one of five components, and it's the one most constrained by the others — particularly your system voltage, which is covered along with the rest of the build on ",[172,1280,1282],{"href":1281},"\u002Foff-grid-diy","the off-grid solar hub",". More component face-offs are in ",[172,1285,1287],{"href":1286},"\u002Foff-grid-diy\u002Fcomparison","my off-grid solar comparisons",", the controllers I've actually used are in ",[172,1290,1292],{"href":1291},"\u002Foff-grid-diy\u002Freview","my off-grid gear reviews",", and what a whole build costs is in ",[172,1295,1297],{"href":1296},"\u002Foff-grid-diy\u002Ftool","the off-grid calculators",[11,1299,1300,1301,181],{},"Worth knowing: a portable power station has a charge controller built in, so this decision is made for you if you buy a finished unit rather than assembling one — see ",[172,1302,1303],{"href":174},"portable power stations",[18,1305,1306,281],{"id":276},[22,1307],{"className":1308,"name":280},[25],[283,1310],{":items":1311},"[{\"q\":\"Is MPPT really worth the extra cost over PWM?\",\"a\":\"For most systems, yes. MPPT typically harvests 15 to 30% more energy and lets you run panels at higher voltage with thinner wire. On a system of 200W or more, that extra harvest usually pays back the price difference within a season or two.\"},{\"q\":\"When is a PWM controller good enough?\",\"a\":\"On very small setups where the panel voltage already matches the battery voltage closely, like a single small panel maintaining a 12V battery. There the efficiency gap is small and the lower price wins.\"},{\"q\":\"Can I use a 24V panel with a 12V battery on PWM?\",\"a\":\"You can, but it is wasteful. PWM drops the extra voltage, so you lose a lot of potential energy. That voltage mismatch is exactly the case where MPPT shines, since it converts the excess into usable current.\"},{\"q\":\"Does MPPT help in cold weather?\",\"a\":\"Yes. Solar panels produce more voltage when cold, and MPPT captures that extra voltage as usable current, while PWM simply discards it. The colder and sunnier your climate, the bigger the MPPT advantage.\"}]",{"title":287,"searchDepth":288,"depth":288,"links":1313},[1314,1315,1316,1317,1318,1319,1320],{"id":20,"depth":288,"text":27},{"id":1089,"depth":288,"text":1094},{"id":42,"depth":288,"text":47},{"id":1201,"depth":288,"text":1205},{"id":1220,"depth":288,"text":1225},{"id":205,"depth":288,"text":210},{"id":276,"depth":288,"text":281},"MPPT vs PWM charge controllers explained simply. When the extra harvest of MPPT is worth it, when a cheap PWM is fine, and how to avoid overpaying for your setup.",{},"\u002Foff-grid-diy\u002Fcomparison\u002Fmppt-vs-pwm-charge-controller",{"title":1062,"description":1321},"off-grid-diy","off-grid-diy\u002Fcomparison\u002Fmppt-vs-pwm-charge-controller","YUhRxorT_osRTpHcb0pytko8hbMa4q7q1mAzb1gUjjA",{"id":1329,"title":1330,"body":1331,"date":296,"description":1631,"extension":298,"meta":1632,"navigation":300,"path":1271,"seo":1633,"silo":1325,"stem":1634,"updated":305,"__hash__":1635},"content\u002Foff-grid-diy\u002Fguide\u002Foff-grid-solar-sizing-guide.md","Off-Grid Solar: How Many Panels and Batteries?",{"type":8,"value":1332,"toc":1621},[1333,1336,1339,1344,1355,1362,1365,1368,1435,1442,1450,1453,1458,1461,1467,1470,1477,1480,1485,1499,1502,1509,1517,1534,1539,1571,1576,1579,1591,1594,1597,1613,1618],[11,1334,1335],{},"\"How many solar panels do I need to go off-grid?\" has no single answer, because it depends entirely on how much energy you use and where you live. But the method to figure it out is simple, and once you know it you can size a cabin, a van, or a tiny house yourself without paying anyone.",[11,1337,1338],{},"This guide is that method, in plain terms, with honest numbers. Do the four steps and you will have a panel count and a battery size you can trust.",[18,1340,1341,325],{"id":320},[22,1342],{"className":1343,"name":324},[25],[212,1345,1346,1349,1352],{},[215,1347,1348],{},"You are planning a DIY off-grid system for a cabin, van, RV, shed or tiny house.",[215,1350,1351],{},"You want to size it yourself instead of guessing or overpaying.",[215,1353,1354],{},"You are okay with rough arithmetic. I will keep it to multiply and divide.",[18,1356,1358,1361],{"id":1357},"step-1-find-your-daily-energy-use-kwhday",[22,1359],{"className":1360,"name":380},[25]," Step 1: Find your daily energy use (kWh\u002Fday)",[11,1363,1364],{},"Everything starts here. List every load, estimate watts times hours per day, and add it up. This is your daily energy budget in watt-hours, then divide by 1000 for kWh.",[11,1366,1367],{},"Rough daily figures:",[52,1369,1370,1379],{},[55,1371,1372],{},[58,1373,1374,1376],{},[61,1375,396],{},[61,1377,1378],{},"Rough energy per day",[71,1380,1381,1388,1395,1403,1411,1419,1427],{},[58,1382,1383,1386],{},[76,1384,1385],{},"LED lights (a few)",[76,1387,417],{},[58,1389,1390,1393],{},[76,1391,1392],{},"Phone and laptop",[76,1394,417],{},[58,1396,1397,1400],{},[76,1398,1399],{},"Fridge (12V or efficient)",[76,1401,1402],{},"0.5 to 1.5 kWh",[58,1404,1405,1408],{},[76,1406,1407],{},"Water pump (intermittent)",[76,1409,1410],{},"0.1 to 0.5 kWh",[58,1412,1413,1416],{},[76,1414,1415],{},"Fan or small vent",[76,1417,1418],{},"0.1 to 0.4 kWh",[58,1420,1421,1424],{},[76,1422,1423],{},"Starlink or internet",[76,1425,1426],{},"0.5 to 1 kWh",[58,1428,1429,1432],{},[76,1430,1431],{},"TV \u002F laptop entertainment",[76,1433,1434],{},"0.2 to 0.6 kWh",[11,1436,1437,1438,1441],{},"A simple cabin or van often lands around ",[32,1439,1440],{},"1 to 3 kWh per day",". Add heavy or heating loads and it climbs fast. Be honest here; a low estimate is the number one reason DIY systems come up short.",[18,1443,1445,1449],{"id":1444},"step-2-size-your-panels-using-sun-hours",[22,1446],{"className":1447,"name":1448},[25],"solar:sun-bold-duotone"," Step 2: Size your panels using sun hours",[11,1451,1452],{},"Panels only produce for a handful of full-strength hours a day, called peak sun hours. This varies by location and season, roughly 3 hours in a cloudy northern winter to 6 or more in a sunny summer.",[11,1454,1455],{},[32,1456,1457],{},"Panel wattage needed = daily energy (Wh) \u002F peak sun hours \u002F system efficiency",[11,1459,1460],{},"Use about 0.7 for system efficiency to cover real-world losses (wiring, controller, dirt, heat, battery round-trip). So for 2 kWh\u002Fday at 4 sun hours:",[11,1462,1463,1464,181],{},"2000 Wh \u002F 4 \u002F 0.7 = roughly ",[32,1465,1466],{},"700W of panels",[11,1468,1469],{},"Always size for your worst realistic month, not summer, or you will be short exactly when the sun is weakest. If you live off-grid year-round, that usually means sizing for winter sun hours.",[18,1471,1473,1476],{"id":1472},"step-3-size-your-battery-bank-kwh",[22,1474],{"className":1475,"name":157},[25]," Step 3: Size your battery bank (kWh)",[11,1478,1479],{},"The battery carries you through the night and cloudy days.",[11,1481,1482],{},[32,1483,1484],{},"Battery capacity = daily energy x days of autonomy \u002F usable depth",[212,1486,1487,1493],{},[215,1488,1489,1492],{},[32,1490,1491],{},"Days of autonomy:"," 1 day if you can tolerate running low in bad weather, 2 to 3 if you want a real buffer for cloudy stretches.",[215,1494,1495,1498],{},[32,1496,1497],{},"Usable depth:"," with LiFePO4 you can safely use around 80 to 90%. Older lead-acid you should only use about 50%, which is one reason LFP has taken over DIY.",[11,1500,1501],{},"For 2 kWh\u002Fday, two days of autonomy, LFP at 85% usable:",[11,1503,1504,1505,1508],{},"2 x 2 \u002F 0.85 = roughly ",[32,1506,1507],{},"4.7 kWh"," of LiFePO4 battery.",[18,1510,1512,1516],{"id":1511},"step-4-pick-the-charge-controller-and-inverter",[22,1513],{"className":1514,"name":1515},[25],"solar:cpu-bolt-bold-duotone"," Step 4: Pick the charge controller and inverter",[212,1518,1519,1528],{},[215,1520,1521,1524,1525,181],{},[32,1522,1523],{},"Charge controller:"," for anything but the tiniest setup, use MPPT. It harvests more and handles higher panel voltage. I break down the choice in ",[172,1526,1527],{"href":1323},"MPPT vs PWM",[215,1529,1530,1533],{},[32,1531,1532],{},"Inverter:"," size it to your largest simultaneous AC load, with surge headroom for motors. If you only run DC and USB loads, you may not need one at all.",[18,1535,1536,521],{"id":516},[22,1537],{"className":1538,"name":520},[25],[212,1540,1541,1547,1553,1559,1565],{},[215,1542,1543,1546],{},[32,1544,1545],{},"Underestimating daily use."," The classic. Measure or overestimate rather than hope.",[215,1548,1549,1552],{},[32,1550,1551],{},"Sizing panels for summer."," Then freezing in the dark in December. Size for your worst month.",[215,1554,1555,1558],{},[32,1556,1557],{},"Ignoring system losses."," The 0.7 efficiency factor is not pessimism, it is reality.",[215,1560,1561,1564],{},[32,1562,1563],{},"Using lead-acid to save money."," You can only use half of it, and it dies faster. LFP usually wins over its life.",[215,1566,1567,1570],{},[32,1568,1569],{},"Forgetting autonomy."," One cloudy day should not black you out. Build in a buffer.",[18,1572,1573,555],{"id":550},[22,1574],{"className":1575,"name":554},[25],[11,1577,1578],{},"Most first-time off-grid builders make two errors that cancel out badly: they lowball their energy use and size panels for summer. The result is a system that feels fine in July and fails in January. Do the math for your real loads and your worst month, use LiFePO4, and put an MPPT controller in the plan. Build a little margin in; running out of power off-grid is a lot more painful than a slightly bigger up-front cost.",[11,1580,1581,1582,1586,1587,181],{},"Curious what a setup like this costs and whether it pays back versus alternatives? Try the ",[172,1583,1585],{"href":1584},"\u002Foff-grid-diy\u002Ftool\u002Foff-grid-solar-payback-calculator","off-grid solar payback calculator",", and for the panels themselves, my notes are in the ",[172,1588,1590],{"href":1589},"\u002Foff-grid-diy\u002Freview\u002Frenogy-100w-solar-panel-review","Renogy 100W review",[183,1592],{"id":1593},"renogy-400w-premium-kit",[183,1595],{"id":1596},"litime-12v-100ah",[11,1598,1599,1600,1602,1603,1607,1608,589,1611,181],{},"Once the numbers are settled, the choice that shapes everything downstream is system voltage — 12V, 24V or 48V — which is explained alongside the five components on ",[172,1601,1282],{"href":1281},". More sizing guidance is in ",[172,1604,1606],{"href":1605},"\u002Foff-grid-diy\u002Fguide","my off-grid buying guides",", the gear itself in ",[172,1609,1610],{"href":1291},"my off-grid reviews",[172,1612,593],{"href":592},[18,1614,1615,281],{"id":276},[22,1616],{"className":1617,"name":280},[25],[283,1619],{":items":1620},"[{\"q\":\"How many solar panels do I need to go off-grid?\",\"a\":\"Divide your daily energy use in watt-hours by your peak sun hours and by about 0.7 for losses. For example, 2 kWh per day at 4 sun hours needs roughly 700W of panels. Always size for your worst month, not summer.\"},{\"q\":\"How big a battery bank do I need for off-grid?\",\"a\":\"Multiply your daily energy use by the days of autonomy you want, then divide by usable depth (about 0.85 for LiFePO4). For 2 kWh per day and two days of buffer, that is roughly 4.7 kWh of LFP battery.\"},{\"q\":\"Should I size my panels for summer or winter?\",\"a\":\"Winter, if you live off-grid year-round. Panels produce far fewer full-sun hours in winter, so sizing for summer leaves you short exactly when you need power most.\"},{\"q\":\"Is LiFePO4 better than lead-acid for off-grid?\",\"a\":\"Usually yes. You can safely use 80 to 90% of a LiFePO4 battery versus about 50% of lead-acid, and it lasts far more cycles. It costs more up front but typically wins over its lifespan.\"}]",{"title":287,"searchDepth":288,"depth":288,"links":1622},[1623,1624,1625,1626,1627,1628,1629,1630],{"id":320,"depth":288,"text":325},{"id":1357,"depth":288,"text":1361},{"id":1444,"depth":288,"text":1449},{"id":1472,"depth":288,"text":1476},{"id":1511,"depth":288,"text":1516},{"id":516,"depth":288,"text":521},{"id":550,"depth":288,"text":555},{"id":276,"depth":288,"text":281},"A plain-English off-grid solar sizing guide. Work out your daily kWh, how many panels and battery kWh you need, and the mistakes that leave DIY systems short.",{},{"title":1330,"description":1631},"off-grid-diy\u002Fguide\u002Foff-grid-solar-sizing-guide","Zo7kGRal77CSEBNHbksWwPkdBhBOitGYny_45qPGQnE",{"id":1637,"title":1638,"body":1639,"date":296,"description":1812,"extension":298,"meta":1813,"navigation":300,"path":1589,"seo":1814,"silo":1325,"stem":1815,"updated":305,"__hash__":1816},"content\u002Foff-grid-diy\u002Freview\u002Frenogy-100w-solar-panel-review.md","Renogy 100W Solar Panel Review: Still the Default?",{"type":8,"value":1640,"toc":1796},[1641,1644,1647,1654,1686,1693,1697,1700,1704,1707,1711,1714,1717,1722,1726,1729,1733,1736,1740,1743,1748,1760,1765,1768,1771,1788,1793],[11,1642,1643],{},"If you've watched a single off-grid or van build video, you've seen a Renogy 100W panel. It became the default 12V DIY panel almost by inertia — which is precisely why it's worth checking whether it's genuinely the right pick or just the familiar one.",[11,1645,1646],{},"I bought these panels and wired them into my own builds. Here's what that's worth knowing, with the manufacturer's specifications labelled as such.",[18,1648,1650,1653],{"id":1649},"what-it-is",[22,1651],{"className":1652,"name":633},[25]," What it is",[212,1655,1656,1662,1668,1674,1680],{},[215,1657,1658,1661],{},[32,1659,1660],{},"Rated power:"," 100W, the standard building block for 12V DIY systems.",[215,1663,1664,1667],{},[32,1665,1666],{},"Type:"," monocrystalline, the more efficient of the common panel types.",[215,1669,1670,1673],{},[32,1671,1672],{},"Voltage:"," 12V nominal, easy to wire in series or parallel for larger arrays.",[215,1675,1676,1679],{},[32,1677,1678],{},"Build:"," aluminium frame and tempered glass, designed to live outdoors for years.",[215,1681,1682,1685],{},[32,1683,1684],{},"Ecosystem:"," sold alongside matching controllers, brackets and complete kits.",[18,1687,1689,1692],{"id":1688},"what-makes-it-a-safe-default",[22,1690],{"className":1691,"name":676},[25]," What makes it a safe default",[679,1694,1696],{"id":1695},"the-ecosystem-does-the-hard-part","The ecosystem does the hard part",[11,1698,1699],{},"This is the real strength, and it's not about the panel. Panels, MPPT controllers, mounts and complete kits are easy to buy together, with consistent mounting patterns and documentation aimed at first-timers. On a first build, that removes most of the opportunities to make an expensive wiring mistake — which is worth more than a few watts.",[679,1701,1703],{"id":1702},"a-format-everything-else-assumes","A format everything else assumes",[11,1705,1706],{},"A 100W 12V mono panel is the unit the entire DIY world plans around. Guides, calculators and kit designs assume it, so it drops into almost any plan without surprises, and you can add to an array over time without rethinking it.",[679,1708,1710],{"id":1709},"it-survives-being-ignored","It survives being ignored",[11,1712,1713],{},"Mine have been bolted down and forgotten through full seasons outdoors with no degradation I can see and no water ingress at the junction box. For something you install once and then stop thinking about, that's the property that matters.",[183,1715],{"id":1716},"renogy-100w",[18,1718,1719,710],{"id":705},[22,1720],{"className":1721,"name":709},[25],[679,1723,1725],{"id":1724},"you-pay-a-premium-per-watt","You pay a premium per watt",[11,1727,1728],{},"This is the main caveat. Because of the brand and ecosystem, you generally pay more than for generic or larger-format panels delivering more watts per dollar. If raw cost-efficiency is your priority, you can do better.",[679,1730,1732],{"id":1731},"_100w-is-small-once-you-scale","100W is small once you scale",[11,1734,1735],{},"For a serious cabin or a full-time van, you'll need several. Larger single panels mean less mounting hardware, fewer connectors and less wiring for the same total wattage — and every connector is a small loss and a potential failure point. The 100W size is convenient for small builds and works against you at scale.",[679,1737,1739],{"id":1738},"part-of-what-youre-buying-is-the-name","Part of what you're buying is the name",[11,1741,1742],{},"The ecosystem genuinely helps beginners. If you're comfortable matching a generic panel to your own controller, you're paying for reassurance you don't need.",[18,1744,1745,741],{"id":737},[22,1746],{"className":1747,"name":343},[25],[212,1749,1750,1755],{},[215,1751,1752,1754],{},[32,1753,748],{}," a first-time DIY builder who wants a proven, well-documented panel that drops into a matching kit with minimal guesswork.",[215,1756,1757,1759],{},[32,1758,754],{}," you're cost-focused or building a large array, where cheaper or larger-format panels give more watts per dollar and per bracket.",[18,1761,1762,765],{"id":760},[22,1763],{"className":1764,"name":764},[25],[11,1766,1767],{},"The Renogy 100W is still a safe, sensible default, especially for beginners who want everything to fit together and simply work. The panel is a standard, durable mono unit, and the ecosystem around it genuinely reduces mistakes on a first build.",[11,1769,1770],{},"What it isn't is the best value per watt. If you're experienced or building big, shop on price per watt and you'll usually do better. If you're starting out, it earns its place — and the money you don't lose to a wiring error covers the premium.",[11,1772,1773,1774,1776,1777,1779,1780,1782,1783,781,1786,181],{},"Either way, size the system before buying panels: use the ",[172,1775,1272],{"href":1271},", and pair it with the right controller via ",[172,1778,1527],{"href":1323},". More component verdicts are in ",[172,1781,1292],{"href":1291},", the wider picture is on the ",[172,1784,1785],{"href":1281},"off-grid solar hub",[172,1787,593],{"href":592},[18,1789,1790,281],{"id":276},[22,1791],{"className":1792,"name":280},[25],[283,1794],{":items":1795},"[{\"q\":\"Is the Renogy 100W panel still worth buying?\",\"a\":\"For beginners, yes. It is a proven, durable monocrystalline panel with a well-documented ecosystem of matching controllers and kits, and that ecosystem prevents the wiring mistakes that cost far more than the price premium. If you are cost-focused or building a large array, cheaper or larger panels give more watts per dollar.\"},{\"q\":\"How many Renogy 100W panels do I need?\",\"a\":\"It depends on your daily energy use and your location's peak sun hours. Divide daily watt-hours by peak sun hours, then apply a system efficiency factor for real-world losses, and divide the result by 100. Size against your worst month rather than an annual average.\",\"href\":\"\u002Foff-grid-diy\u002Fguide\u002Foff-grid-solar-sizing-guide\",\"linkText\":\"Size your system\"},{\"q\":\"Is Renogy overpriced compared to generic panels?\",\"a\":\"You do pay a premium for the brand and the ecosystem. That is worth it for beginners who want components that fit together without research, and hard to justify for experienced builders comfortable matching their own parts, who can usually get more watts per dollar elsewhere.\"},{\"q\":\"Do I need an MPPT controller with a 100W panel?\",\"a\":\"For a single 100W panel a PWM controller is adequate and the price difference is hard to justify. MPPT harvests more and scales far better as you add panels, so if there is any chance you will expand, it is the safer long-term choice.\",\"href\":\"\u002Foff-grid-diy\u002Fcomparison\u002Fmppt-vs-pwm-charge-controller\",\"linkText\":\"MPPT vs PWM\"}]",{"title":287,"searchDepth":288,"depth":288,"links":1797},[1798,1799,1804,1809,1810,1811],{"id":1649,"depth":288,"text":1653},{"id":1688,"depth":288,"text":1692,"children":1800},[1801,1802,1803],{"id":1695,"depth":798,"text":1696},{"id":1702,"depth":798,"text":1703},{"id":1709,"depth":798,"text":1710},{"id":705,"depth":288,"text":710,"children":1805},[1806,1807,1808],{"id":1724,"depth":798,"text":1725},{"id":1731,"depth":798,"text":1732},{"id":1738,"depth":798,"text":1739},{"id":737,"depth":288,"text":741},{"id":760,"depth":288,"text":765},{"id":276,"depth":288,"text":281},"My Renogy 100W solar panel review after wiring it into my own builds: why it became the DIY default, where it costs you, and whether it's still the right pick.",{},{"title":1638,"description":1812},"off-grid-diy\u002Freview\u002Frenogy-100w-solar-panel-review","6AGDJmUESy_m_7mqvcADdK41rvPc5ANfg4reeRXtlog",{"id":1818,"title":1819,"body":1820,"date":296,"description":2019,"extension":298,"meta":2020,"navigation":300,"path":1584,"seo":2021,"silo":1325,"stem":2022,"updated":305,"__hash__":2023},"content\u002Foff-grid-diy\u002Ftool\u002Foff-grid-solar-payback-calculator.md","Off-Grid Solar Payback Calculator: What Will It Cost and Save?",{"type":8,"value":1821,"toc":2013},[1822,1825,1828,1834,1842,1845,1850,1853,1867,1870,1877,1949,1952,1959,1979,1982,1984,1986,1994,2005,2010],[11,1823,1824],{},"Before you buy a single panel, it helps to know the honest financial picture: what a setup costs, what it saves you each year versus the alternative, and how long until it pays for itself. This calculator gives you that estimate for a DIY solar setup.",[11,1826,1827],{},"Enter the system's wattage and your estimated cost, and it works out the rough payback based on what that solar production is worth to you.",[1829,1830],"solar-roi-calculator",{":power":1831,":price":1832,"cta-to":1271,"cta-label":1833},"600","900","Size your off-grid system first",[18,1835,1837,1841],{"id":1836},"how-the-payback-is-estimated",[22,1838],{"className":1839,"name":1840},[25],"solar:calculator-minimalistic-bold-duotone"," How the payback is estimated",[11,1843,1844],{},"Payback is just cost divided by yearly savings:",[11,1846,1847],{},[32,1848,1849],{},"Payback (years) = System cost \u002F Annual value of the energy it produces",[11,1851,1852],{},"The two inputs that decide it:",[212,1854,1855,1861],{},[215,1856,1857,1860],{},[32,1858,1859],{},"System cost."," Panels, battery, charge controller, inverter, wiring and mounts. DIY keeps this low because you skip installation labor, which is often a large chunk of a professional quote.",[215,1862,1863,1866],{},[32,1864,1865],{},"Annual value of production."," This is what the solar energy replaces. Off-grid, it is usually the cost of the alternative you would otherwise run, most often generator fuel, or grid power if a connection was even an option. In many remote cases, the alternative is having no power at all, and then the \"payback\" is really about avoided generator fuel and hassle.",[11,1868,1869],{},"One honest note: off-grid solar is often not primarily a money decision. When running a grid line to a remote cabin would cost tens of thousands, solar is not competing on payback, it is the only sane option. The calculator is most useful when you have a real alternative to compare against, like a fuel generator.",[18,1871,1873,1876],{"id":1872},"what-drives-payback-up-or-down",[22,1874],{"className":1875,"name":885},[25]," What drives payback up or down",[52,1878,1879,1892],{},[55,1880,1881],{},[58,1882,1883,1886,1889],{},[61,1884,1885],{},"Factor",[61,1887,1888],{},"Faster payback",[61,1890,1891],{},"Slower payback",[71,1893,1894,1905,1916,1927,1938],{},[58,1895,1896,1899,1902],{},[76,1897,1898],{},"Alternative cost",[76,1900,1901],{},"Expensive generator fuel or grid extension",[76,1903,1904],{},"Cheap grid power available",[58,1906,1907,1910,1913],{},[76,1908,1909],{},"Sun hours",[76,1911,1912],{},"Sunny location, year-round",[76,1914,1915],{},"Cloudy northern climate",[58,1917,1918,1921,1924],{},[76,1919,1920],{},"DIY vs installed",[76,1922,1923],{},"You build it yourself",[76,1925,1926],{},"You pay for installation",[58,1928,1929,1932,1935],{},[76,1930,1931],{},"Battery share of cost",[76,1933,1934],{},"Modest battery",[76,1936,1937],{},"Huge battery bank for many days of autonomy",[58,1939,1940,1943,1946],{},[76,1941,1942],{},"Usage",[76,1944,1945],{},"You use most of what you produce",[76,1947,1948],{},"Oversized system, wasted output",[11,1950,1951],{},"The single biggest lever is what you are replacing. Displacing expensive generator runtime pays back fast. Displacing cheap grid power pays back slowly, which is exactly why off-grid solar makes the most sense where the grid is far away or absent.",[18,1953,1955,1958],{"id":1954},"how-to-read-your-result",[22,1956],{"className":1957,"name":209},[25]," How to read your result",[212,1960,1961,1967,1973],{},[215,1962,1963,1966],{},[32,1964,1965],{},"Short payback (a few years):"," you are replacing something expensive, like constant generator use. Solar is clearly worth it.",[215,1968,1969,1972],{},[32,1970,1971],{},"Long payback (many years):"," you are competing against cheap grid power, or you oversized the system. Rightsize it, or accept that your reasons are non-financial (silence, independence, no fuel runs).",[215,1974,1975,1978],{},[32,1976,1977],{},"No real alternative:"," if the honest comparison is \"no power at all,\" ignore payback and focus on sizing it correctly instead.",[183,1980],{"id":1981},"renogy-100w-starter-kit",[183,1983],{"id":1593},[183,1985],{"id":1596},[11,1987,1988,1989,1991,1992,181],{},"Before spending, make sure the system is sized for your real loads and your worst month. That is the difference between a setup that works in December and one that only works in July. Walk through it in the ",[172,1990,1272],{"href":1271},", and choose the controller with ",[172,1993,1527],{"href":1323},[11,1995,1996,1997,1999,2000,2002,2003,181],{},"For the whole picture — the five components, the three build sizes and the system-voltage decision — start at ",[172,1998,1282],{"href":1281},". Other estimators live in ",[172,2001,1297],{"href":1296},", and the components I've bought and wired are in ",[172,2004,1292],{"href":1291},[18,2006,2007,281],{"id":276},[22,2008],{"className":2009,"name":280},[25],[283,2011],{":items":2012},"[{\"q\":\"How long does off-grid solar take to pay for itself?\",\"a\":\"It depends on what it replaces. Displacing expensive generator fuel can pay back in a few years; competing against cheap grid power can take much longer. The calculator estimates payback from your system cost and the value of the energy it produces.\"},{\"q\":\"Is off-grid solar actually cheaper than the grid?\",\"a\":\"Not always on a pure cost basis if grid power is available and cheap. But when extending the grid to a remote site would cost tens of thousands, solar is far cheaper, and often the only realistic option.\"},{\"q\":\"Does DIY really save that much versus a professional install?\",\"a\":\"Yes, labor is often a large share of an installed system's cost. Building it yourself removes that, which shortens payback noticeably, as long as you size and wire it correctly.\"},{\"q\":\"Why is my payback so long in the calculator?\",\"a\":\"Usually because you are comparing against cheap grid power, or the system is oversized for what you use. Rightsize it to your real loads, or recognize that your reasons for going off-grid may be independence and no fuel runs rather than pure savings.\"}]",{"title":287,"searchDepth":288,"depth":288,"links":2014},[2015,2016,2017,2018],{"id":1836,"depth":288,"text":1841},{"id":1872,"depth":288,"text":1876},{"id":1954,"depth":288,"text":1958},{"id":276,"depth":288,"text":281},"Free off-grid solar payback calculator. Estimate the cost of a DIY solar setup, what it saves versus grid or generator power, and how many years to break even.",{},{"title":1819,"description":2019},"off-grid-diy\u002Ftool\u002Foff-grid-solar-payback-calculator","ogxkBAprqMkBj8IKZfdfyN5D-ayoGdYERAb3trWN-ZQ",{"id":2025,"title":2026,"body":2027,"date":296,"description":2268,"extension":298,"meta":2269,"navigation":300,"path":2270,"seo":2271,"silo":2272,"stem":2273,"updated":305,"__hash__":2274},"content\u002Fportable-power\u002Fcomparison\u002Fportable-power-station-vs-gas-generator.md","Portable Power Station vs Gas Generator",{"type":8,"value":2028,"toc":2260},[2029,2032,2035,2040,2050,2055,2058,2150,2157,2160,2163,2166,2169,2177,2180,2183,2186,2191,2229,2232,2252,2257],[11,2030,2031],{},"Every time I mention I run a solar power station instead of a gas generator, someone tells me I am wasting my money. And every time I visit a friend with a loud gas generator humming in the driveway during an outage, I am glad I made the switch. The truth is neither one is \"better\" in the absolute. They solve the same problem in very different ways.",[11,2033,2034],{},"Here is how I actually think about it, without the brand hype on either side.",[18,2036,2037,27],{"id":20},[22,2038],{"className":2039,"name":26},[25],[11,2041,2042,2043,2045,2046,2049],{},"If you need quiet, indoor-safe power for electronics, a fridge and short-to-medium outages, get a ",[32,2044,34],{},". If you need to run heavy loads (well pump, AC, power tools all day) for long multi-day outages, a ",[32,2047,2048],{},"gas generator"," still wins on raw endurance and cost per watt-hour.",[18,2051,2052,47],{"id":42},[22,2053],{"className":2054,"name":46},[25],[11,2056,2057],{},"Rough real-world comparison. Treat the numbers as ballpark figures, not lab specs.",[52,2059,2060,2071],{},[55,2061,2062],{},[58,2063,2064,2066,2068],{},[61,2065,63],{},[61,2067,66],{},[61,2069,2070],{},"Gas generator",[71,2072,2073,2084,2095,2106,2117,2128,2139],{},[58,2074,2075,2078,2081],{},[76,2076,2077],{},"Noise",[76,2079,2080],{},"Near silent (fan only)",[76,2082,2083],{},"Loud, 60 to 75 dB",[58,2085,2086,2089,2092],{},[76,2087,2088],{},"Safe indoors",[76,2090,2091],{},"Yes, no fumes",[76,2093,2094],{},"No, carbon monoxide risk",[58,2096,2097,2100,2103],{},[76,2098,2099],{},"Fuel",[76,2101,2102],{},"Battery, recharge from wall or solar",[76,2104,2105],{},"Gasoline, needs storage and refills",[58,2107,2108,2111,2114],{},[76,2109,2110],{},"Runtime",[76,2112,2113],{},"Limited by battery size (Wh)",[76,2115,2116],{},"As long as you have fuel",[58,2118,2119,2122,2125],{},[76,2120,2121],{},"Upfront cost",[76,2123,2124],{},"Higher per watt-hour",[76,2126,2127],{},"Lower per watt-hour",[58,2129,2130,2133,2136],{},[76,2131,2132],{},"Maintenance",[76,2134,2135],{},"Almost none",[76,2137,2138],{},"Oil, filters, stale fuel",[58,2140,2141,2144,2147],{},[76,2142,2143],{},"Heavy loads (AC, well pump)",[76,2145,2146],{},"Only high-output models",[76,2148,2149],{},"Handles them easily",[18,2151,2153,2156],{"id":2152},"where-the-power-station-wins",[22,2154],{"className":2155,"name":157},[25]," Where the power station wins",[11,2158,2159],{},"For me, the deciding factor was living with the thing. A power station makes no noise, produces no fumes, and I can keep it in a closet and run it in the living room during an outage. No gas cans in the garage, no pull cord at 2 a.m., no oil changes.",[11,2161,2162],{},"It is also the only option that makes sense for camping if you value quiet, or for anyone who wants to recharge from solar panels and stay fully off fuel. For phones, laptops, a CPAP machine, lights and a fridge, it is genuinely the better tool.",[11,2164,2165],{},"The catch is runtime. A power station only holds what its battery holds. When it is empty, you are waiting hours to recharge unless you have enough sun.",[183,2167],{"id":2168},"jackery-explorer-1000-v2",[18,2170,2172,2176],{"id":2171},"where-the-gas-generator-wins",[22,2173],{"className":2174,"name":2175},[25],"solar:fuel-bold-duotone"," Where the gas generator wins",[11,2178,2179],{},"If your goal is to keep a whole house running through a three-day storm, including an air conditioner or a well pump, a gas generator is hard to beat. You refuel and keep going. The upfront cost per usable watt-hour is much lower, and heavy inductive loads that make a small inverter choke are no problem.",[11,2181,2182],{},"The price you pay is everything else: noise your neighbors will hear, fumes that mean it must stay outside and far from windows, fuel you have to store and rotate, and maintenance you cannot skip if you want it to start when you actually need it.",[183,2184],{"id":2185},"westinghouse-wgen9500df",[18,2187,2188,210],{"id":205},[22,2189],{"className":2190,"name":209},[25],[212,2192,2193,2202,2208,2214,2220],{},[215,2194,2195,2198,2199,2201],{},[32,2196,2197],{},"You mostly power electronics, a fridge, lights, and want quiet."," Get a power station. See my ",[172,2200,180],{"href":179}," to size it.",[215,2203,2204,2207],{},[32,2205,2206],{},"You need to run an AC unit or well pump for days."," Get a gas generator, or a very large power station paired with solar.",[215,2209,2210,2213],{},[32,2211,2212],{},"You want indoor-safe backup and zero maintenance."," Power station, no contest.",[215,2215,2216,2219],{},[32,2217,2218],{},"You want the lowest upfront cost for long runtime."," Gas generator.",[215,2221,2222,2225,2226,253],{},[32,2223,2224],{},"You are not sure how much capacity you need."," Run your appliances through the ",[172,2227,2228],{"href":877},"runtime calculator",[11,2230,2231],{},"Personally, I landed on a large power station plus a couple of solar panels, and I have never looked back. But I do not have a well pump. If I did, I would keep a generator around too. Be honest about your loads before you spend.",[11,2233,2234,2235,2238,2239,2243,2244,2248,2249,181],{},"If the answer is a power station, ",[172,2236,2237],{"href":174},"the portable power station hub"," covers which size band fits which job, and ",[172,2240,2242],{"href":2241},"\u002Fportable-power\u002Freview","my portable power station reviews"," cover the individual units. More head-to-heads are in ",[172,2245,2247],{"href":2246},"\u002Fportable-power\u002Fcomparison","all my portable power comparisons",". And if your real problem is keeping a house running rather than powering gear you carry, that's a different ladder entirely — see ",[172,2250,2251],{"href":262},"home backup power",[18,2253,2254,281],{"id":276},[22,2255],{"className":2256,"name":280},[25],[283,2258],{":items":2259},"[{\"q\":\"Can a portable power station replace a gas generator completely?\",\"a\":\"For electronics, a fridge, lights and short outages, yes. For heavy loads like central AC or a well pump over multi-day outages, not unless you buy a very large unit and pair it with enough solar to recharge daily.\",\"href\":\"\u002Fportable-power\u002Fguide\u002Fportable-power-station-buying-guide\",\"linkText\":\"See how to size a power station\"},{\"q\":\"Is a power station cheaper than a generator in the long run?\",\"a\":\"It can be. You pay more upfront, but you spend nothing on fuel, oil or maintenance, and a LiFePO4 unit lasts years. If you rarely use it, the generator's low upfront cost may still win overall.\"},{\"q\":\"Are power stations safe to use indoors?\",\"a\":\"Yes. They produce no exhaust, so they are safe inside. Gas generators produce carbon monoxide and must always run outdoors, away from windows and doors.\"},{\"q\":\"How long will a power station run my fridge during an outage?\",\"a\":\"Roughly, a full-size fridge uses about 1 to 2 kWh per day because it cycles on and off. A 1000 Wh station gets you most of a day; a 2000 Wh unit a bit over a day. Solar recharging extends that indefinitely in good weather.\",\"href\":\"\u002Fportable-power\u002Ftool\u002Fpower-station-runtime-calculator\",\"linkText\":\"Estimate your runtime\"}]",{"title":287,"searchDepth":288,"depth":288,"links":2261},[2262,2263,2264,2265,2266,2267],{"id":20,"depth":288,"text":27},{"id":42,"depth":288,"text":47},{"id":2152,"depth":288,"text":2156},{"id":2171,"depth":288,"text":2176},{"id":205,"depth":288,"text":210},{"id":276,"depth":288,"text":281},"Portable power station or gas generator? I break down the real trade-offs on noise, cost, runtime and safety so you can pick the right one for camping and blackouts.",{},"\u002Fportable-power\u002Fcomparison\u002Fportable-power-station-vs-gas-generator",{"title":2026,"description":2268},"portable-power","portable-power\u002Fcomparison\u002Fportable-power-station-vs-gas-generator","0wk9Ef2q3XQLwt5qL5-9ZDELkZ3Kf7TmuzdhvRwsOHE",{"id":2276,"title":2277,"body":2278,"date":296,"description":2593,"extension":298,"meta":2594,"navigation":300,"path":179,"seo":2595,"silo":2272,"stem":2596,"updated":305,"__hash__":2597},"content\u002Fportable-power\u002Fguide\u002Fportable-power-station-buying-guide.md","Portable Power Station Buying Guide",{"type":8,"value":2279,"toc":2581},[2280,2283,2286,2291,2302,2310,2316,2323,2326,2329,2390,2393,2396,2400,2407,2410,2424,2427,2435,2438,2441,2452,2459,2462,2478,2486,2503,2508,2534,2539,2542,2553,2555,2557,2573,2578],[11,2281,2282],{},"I have lost count of how many people message me after buying the wrong power station. Usually it is one of two mistakes: they bought something far too small because it was on sale, or they bought a huge unit they lug around half empty. Both come from not understanding three numbers on the box.",[11,2284,2285],{},"This guide fixes that. By the end you will know exactly what size to buy, which battery type to insist on, and the traps that make cheap units a bad deal. No brand worship, just what actually matters.",[18,2287,2288,325],{"id":320},[22,2289],{"className":2290,"name":324},[25],[212,2292,2293,2296,2299],{},[215,2294,2295],{},"You are considering a power station for camping, van life, a home office backup, or short blackouts.",[215,2297,2298],{},"You want something safe to run indoors, quiet, and low maintenance.",[215,2300,2301],{},"You are tired of spec sheets that all sound the same.",[18,2303,2305,2309],{"id":2304},"who-should-not-bother",[22,2306],{"className":2307,"name":2308},[25],"solar:user-cross-bold-duotone"," Who should not bother",[11,2311,2312,2313,181],{},"If you need to power a central AC unit, a well pump, or a whole house for days at a time, a portable power station is the wrong tool at any sane budget. That is generator or whole-home battery territory. See my take in ",[172,2314,2315],{"href":2270},"power station vs gas generator",[18,2317,2319,2322],{"id":2318},"spec-1-capacity-watt-hours-wh",[22,2320],{"className":2321,"name":157},[25]," Spec 1: Capacity (watt-hours, Wh)",[11,2324,2325],{},"Capacity is the size of your energy tank. A 1000 Wh station can, in theory, run a 1000-watt device for one hour, or a 100-watt device for ten hours. In practice you lose 10 to 15% to inverter and conversion losses, so plan for a bit less than the sticker number.",[11,2327,2328],{},"Here is roughly what different capacities cover:",[52,2330,2331,2344],{},[55,2332,2333],{},[58,2334,2335,2338,2341],{},[61,2336,2337],{},"Capacity",[61,2339,2340],{},"Good for",[61,2342,2343],{},"Not enough for",[71,2345,2346,2357,2368,2379],{},[58,2347,2348,2351,2354],{},[76,2349,2350],{},"200 to 500 Wh",[76,2352,2353],{},"Phones, laptops, camera gear, a fan, LED lights",[76,2355,2356],{},"A fridge overnight",[58,2358,2359,2362,2365],{},[76,2360,2361],{},"500 to 1000 Wh",[76,2363,2364],{},"A weekend camp, CPAP machine, mini fridge, small tools",[76,2366,2367],{},"Days of fridge backup",[58,2369,2370,2373,2376],{},[76,2371,2372],{},"1000 to 2000 Wh",[76,2374,2375],{},"Home office backup, full-size fridge for most of a day, van life",[76,2377,2378],{},"Multi-day whole-home",[58,2380,2381,2384,2387],{},[76,2382,2383],{},"2000 Wh and up",[76,2385,2386],{},"Longer outages, several appliances, pairing with solar",[76,2388,2389],{},"Central AC, well pump",[11,2391,2392],{},"The mistake I see most: buying 300 Wh because it is cheap, then discovering it cannot get a fridge through the night. Buy for the job you actually have.",[11,2394,2395],{},"Not sure which bucket you fall into? Pick your appliance and a capacity below and see the real runtime, losses included.",[826,2397],{":capacity":2398,"cta-to":2270,"cta-label":2399},"1000","Power station vs generator: which fits you",[18,2401,2403,2406],{"id":2402},"spec-2-battery-cell-type-insist-on-lifepo4",[22,2404],{"className":2405,"name":1515},[25]," Spec 2: Battery cell type (insist on LiFePO4)",[11,2408,2409],{},"This is the single biggest factor in how long your money lasts, and it is the one marketers bury.",[212,2411,2412,2418],{},[215,2413,2414,2417],{},[32,2415,2416],{},"Standard lithium-ion (NMC):"," around 500 full cycles before it drops toward 80% capacity. Used often, that is roughly two years.",[215,2419,2420,2423],{},[32,2421,2422],{},"LiFePO4 (LFP, lithium iron phosphate):"," 3000 or more cycles to the same point, close to ten years of near-daily use. It is also more thermally stable, which matters for something you keep in a hot van or a closet.",[11,2425,2426],{},"My rule is simple: if the listing does not clearly say LiFePO4, assume it is the older chemistry and walk away. The small upfront saving is not worth replacing the unit in two years.",[18,2428,2430,2434],{"id":2429},"spec-3-inverter-output-watts-w",[22,2431],{"className":2432,"name":2433},[25],"solar:bolt-bold-duotone"," Spec 3: Inverter output (watts, W)",[11,2436,2437],{},"Capacity (Wh) is how much energy you store. Output (W) is how fast you can pull it. These are different, and confusing them ruins purchases.",[11,2439,2440],{},"You can own a big 2000 Wh station that still cannot run a 1200-watt coffee maker if its inverter is capped at 1000W. Anything that heats is the test: kettles, hair dryers, microwaves, space heaters, induction cooktops all pull 1000 to 1800 watts.",[212,2442,2443,2446,2449],{},[215,2444,2445],{},"For electronics and a fridge: 1000W output is fine.",[215,2447,2448],{},"To run heating appliances: insist on 1500W to 2000W or more.",[215,2450,2451],{},"Check the surge rating too. Fridges and pumps spike hard for a split second when the motor starts.",[18,2453,2455,2458],{"id":2454},"if-you-want-to-recharge-from-solar",[22,2456],{"className":2457,"name":1448},[25]," If you want to recharge from solar",[11,2460,2461],{},"Most stations can charge from solar panels, but two details decide whether it is pleasant or painful:",[212,2463,2464,2470],{},[215,2465,2466,2469],{},[32,2467,2468],{},"Max solar input (watts)."," A unit that accepts 400W of solar recharges far faster than one capped at 100W. Under-spec solar input is a common way to make a \"solar generator\" barely solar.",[215,2471,2472,2475,2476,181],{},[32,2473,2474],{},"Charge controller type."," Look for MPPT, not PWM, for meaningfully better harvest. I explain the difference in ",[172,2477,1527],{"href":1323},[18,2479,2481,2485],{"id":2480},"quick-spec-checklist-before-you-buy",[22,2482],{"className":2483,"name":2484},[25],"solar:checklist-minimalistic-bold-duotone"," Quick spec checklist before you buy",[212,2487,2488,2491,2494,2497,2500],{},[215,2489,2490],{},"Capacity (Wh) matched to your real appliances, not the sale price.",[215,2492,2493],{},"LiFePO4 chemistry, stated clearly.",[215,2495,2496],{},"Inverter output (W) high enough for your heaviest device, with surge headroom.",[215,2498,2499],{},"Enough solar input if you plan to recharge off-grid.",[215,2501,2502],{},"Enough and the right kind of outlets (AC, USB-C PD, 12V) for your gear.",[18,2504,2505,521],{"id":516},[22,2506],{"className":2507,"name":520},[25],[212,2509,2510,2516,2522,2528],{},[215,2511,2512,2515],{},[32,2513,2514],{},"Buying on capacity alone."," A huge tank with a weak inverter still cannot run your kettle.",[215,2517,2518,2521],{},[32,2519,2520],{},"Ignoring chemistry."," Two years later they are shopping again.",[215,2523,2524,2527],{},[32,2525,2526],{},"Over-buying \"just in case.\""," A 2000 Wh brick you never fill is heavy and wasteful. Match the load.",[215,2529,2530,2533],{},[32,2531,2532],{},"Trusting \"solar generator\" branding."," Some accept so little solar that recharging takes all day. Check the input number.",[18,2535,2536,555],{"id":550},[22,2537],{"className":2538,"name":554},[25],[11,2540,2541],{},"For most people, a 1000 to 1500 Wh LiFePO4 unit with at least 1500W output is the sweet spot. It covers a home office, a fridge, camping, and short outages without being a boat anchor. Go bigger only if you have named a specific heavy load it needs to run. Go smaller only if you truly just charge electronics.",[11,2543,2544,2545,2548,2549,181],{},"Once you have your size, the next step is picking a model. Every unit I have bought and used is written up in the ",[172,2546,2547],{"href":2241},"reviews section",", starting with the ",[172,2550,2552],{"href":2551},"\u002Fportable-power\u002Freview\u002Fecoflow-delta-2-review","EcoFlow Delta 2 review",[183,2554],{"id":2168},[183,2556],{"id":1008},[11,2558,2559,2560,2562,2563,2567,2568,2570,2571,181],{},"Where to go from here: the size bands and the terminology behind them are laid out on ",[172,2561,2237],{"href":174},"; the rest of my step-by-step guidance is in ",[172,2564,2566],{"href":2565},"\u002Fportable-power\u002Fguide","my portable power buying guides","; and if you're still weighing this against fuel-based backup, ",[172,2569,2247],{"href":2246}," start with that question. Scores on the boxes above are explained in ",[172,2572,593],{"href":592},[18,2574,2575,281],{"id":276},[22,2576],{"className":2577,"name":280},[25],[283,2579],{":items":2580},"[{\"q\":\"What size power station do I need for camping?\",\"a\":\"For phones, lights, a fan and charging camera gear, 300 to 500 Wh is plenty for a weekend. Add a mini fridge or CPAP machine and you want 500 to 1000 Wh. Use the runtime calculator with your actual devices to be sure.\",\"href\":\"\u002Fportable-power\u002Ftool\u002Fpower-station-runtime-calculator\",\"linkText\":\"Run the numbers\"},{\"q\":\"Is LiFePO4 really worth paying more for?\",\"a\":\"Yes. It lasts roughly six times as many charge cycles as older lithium-ion, so the cost per year of use is usually lower even though the sticker price is higher. It is also safer thermally.\"},{\"q\":\"Can a power station run a full-size refrigerator?\",\"a\":\"Yes, if the inverter output covers the fridge's startup surge and you have enough capacity. Roughly, a 1000 to 2000 Wh unit runs a fridge for most of a day to a bit over a day, since fridges cycle on and off rather than run constantly.\"},{\"q\":\"What is the difference between watts and watt-hours?\",\"a\":\"Watt-hours (Wh) are how much energy is stored, the size of the tank. Watts (W) are how fast you can draw it, the size of the pipe. You need enough of both: capacity for runtime, output for your heaviest appliance.\"}]",{"title":287,"searchDepth":288,"depth":288,"links":2582},[2583,2584,2585,2586,2587,2588,2589,2590,2591,2592],{"id":320,"depth":288,"text":325},{"id":2304,"depth":288,"text":2309},{"id":2318,"depth":288,"text":2322},{"id":2402,"depth":288,"text":2406},{"id":2429,"depth":288,"text":2434},{"id":2454,"depth":288,"text":2458},{"id":2480,"depth":288,"text":2485},{"id":516,"depth":288,"text":521},{"id":550,"depth":288,"text":555},{"id":276,"depth":288,"text":281},"A no-hype portable power station buying guide. Learn what size you actually need, why LiFePO4 matters, and the specs marketers hope you ignore before you buy.",{},{"title":2277,"description":2593},"portable-power\u002Fguide\u002Fportable-power-station-buying-guide","EoKsWAA6xY9TsruLvzB8zGpRprAboPB6tmWqPNhFULs",{"id":2599,"title":2600,"body":2601,"date":296,"description":2783,"extension":298,"meta":2784,"navigation":300,"path":2551,"seo":2785,"silo":2272,"stem":2786,"updated":305,"__hash__":2787},"content\u002Fportable-power\u002Freview\u002Fecoflow-delta-2-review.md","EcoFlow Delta 2 Review: Still Worth Buying?",{"type":8,"value":2602,"toc":2767},[2603,2606,2609,2616,2619,2651,2656,2661,2665,2668,2672,2675,2679,2682,2685,2690,2694,2697,2701,2704,2708,2711,2716,2728,2733,2736,2739,2759,2764],[11,2604,2605],{},"The EcoFlow Delta 2 has been one of the most recommended 1,000 Wh power stations for years, which is exactly why it deserves a sceptical look. Is it still a smart buy, or just a familiar name?",[11,2607,2608],{},"I bought this one at retail and have used it for camping, as a home office backup and through a couple of outages. Below is what that taught me, with the manufacturer's published specifications clearly labelled as such.",[18,2610,2612,2615],{"id":2611},"the-specs-that-matter",[22,2613],{"className":2614,"name":633},[25]," The specs that matter",[11,2617,2618],{},"Manufacturer figures:",[212,2620,2621,2627,2633,2639,2645],{},[215,2622,2623,2626],{},[32,2624,2625],{},"Capacity:"," 1024 Wh",[215,2628,2629,2632],{},[32,2630,2631],{},"Cell type:"," LiFePO4, rated around 3,000 cycles to 80% capacity",[215,2634,2635,2638],{},[32,2636,2637],{},"AC output:"," 1800W, with surge headroom well above that",[215,2640,2641,2644],{},[32,2642,2643],{},"Solar input:"," up to 500W",[215,2646,2647,2650],{},[32,2648,2649],{},"Fast charging:"," to roughly 80% in under an hour from the wall",[11,2652,2653,2654,181],{},"On paper it hits the three things I tell people to insist on: a sensible 1 kWh capacity, long-life LFP chemistry, and an inverter strong enough for most heating appliances. That alone puts it ahead of plenty of cheaper units still shipping older chemistry — the reasoning behind those three priorities is in the ",[172,2655,180],{"href":179},[18,2657,2658,677],{"id":672},[22,2659],{"className":2660,"name":676},[25],[679,2662,2664],{"id":2663},"the-chemistry-and-what-it-means-for-lifespan","The chemistry, and what it means for lifespan",[11,2666,2667],{},"LiFePO4 at this price was the headline when it launched and it's still the reason to consider it. Cycle life is the spec that decides whether you're buying something for two years or ten, and this is firmly in the second camp. Mine shows no capacity change I can detect in normal use.",[679,2669,2671],{"id":2670},"charging-speed-you-actually-notice","Charging speed you actually notice",[11,2673,2674],{},"The wall-charge speed is the feature I've come to rely on most. Forgetting to top it up before a trip used to mean postponing the trip; now it means waiting through a coffee. It's the kind of specification that sounds like marketing until it saves you once.",[679,2676,2678],{"id":2677},"enough-output-to-stop-thinking-about-output","Enough output to stop thinking about output",[11,2680,2681],{},"1800W covers a coffee maker, a microwave, or most power tools a 1 kWh unit could realistically sustain. In practice I've never been limited by the inverter — I run out of battery first, which is the right way round.",[183,2683],{"id":2684},"ecoflow-delta-2",[18,2686,2687,710],{"id":705},[22,2688],{"className":2689,"name":709},[25],[679,2691,2693],{"id":2692},"the-fans","The fans",[11,2695,2696],{},"This is my main complaint. They ramp up and are clearly audible when charging fast or running a heavy load. In a living room it's unremarkable; in a small van or a bedroom at night it's the thing you'll notice. If sleeping beside it matters to you, weigh this properly.",[679,2698,2700],{"id":2699},"weight","Weight",[11,2702,2703],{},"At around 27 lb it's portable in the carry-it-to-the-car sense, not the carry-it-far sense. That's normal for the capacity, but don't picture something you'll sling over a shoulder.",[679,2705,2707],{"id":2706},"its-no-longer-the-automatic-answer","It's no longer the automatic answer",[11,2709,2710],{},"Newer 1 kWh units from Anker, Bluetti and others have narrowed or closed the gap, some with more solar input or quieter operation. The Delta 2 is no longer the default recommendation it once was, which changes how you should buy it — see below.",[18,2712,2713,741],{"id":737},[22,2714],{"className":2715,"name":343},[25],[212,2717,2718,2723],{},[215,2719,2720,2722],{},[32,2721,748],{}," you want a proven, well-supported 1 kWh LiFePO4 unit with genuinely fast charging for home backup, van life or camping, and you find it discounted.",[215,2724,2725,2727],{},[32,2726,754],{}," you need the quietest possible unit to sleep beside, or a newer model matches it on price while beating it on solar input.",[18,2729,2730,765],{"id":760},[22,2731],{"className":2732,"name":764},[25],[11,2734,2735],{},"The Delta 2 is a solid, sensible choice rather than a standout. The fundamentals I care about — LFP chemistry, real output, fast charging — are all here and all still competitive.",[11,2737,2738],{},"What's changed is the field around it. So buy it on price: meaningfully cheaper than a comparable newer unit, it's a smart pick; at parity, compare carefully. That's a genuinely different conclusion from \"this is the one to buy,\" and it's the honest one.",[11,2740,2741,2742,2745,2746,2748,2749,2752,2753,2756,2757,181],{},"Not sure a 1 kWh unit is even the right size? Start with the ",[172,2743,2744],{"href":179},"buying guide",", or put your own appliances through the ",[172,2747,2228],{"href":877},". To see how it sits against the alternatives, browse ",[172,2750,2751],{"href":2241},"my other portable power station reviews"," or the wider ",[172,2754,2755],{"href":174},"portable power station guide",". How the score above is built is explained in ",[172,2758,593],{"href":592},[18,2760,2761,281],{"id":276},[22,2762],{"className":2763,"name":280},[25],[283,2765],{":items":2766},"[{\"q\":\"Is the EcoFlow Delta 2 still worth buying?\",\"a\":\"Yes, on price. Its LiFePO4 chemistry, 1800W output and fast charging all still hold up well. Newer 1 kWh units have caught up, so it represents best value when discounted below comparable rivals rather than at full list price.\"},{\"q\":\"Does the EcoFlow Delta 2 use LiFePO4 batteries?\",\"a\":\"Yes. EcoFlow rates the cells at around 3,000 cycles to 80% capacity, which is why it ages far better than the older lithium-ion units it replaced.\"},{\"q\":\"Is the Delta 2 loud?\",\"a\":\"The fans are clearly audible when it is charging quickly or running a heavy load. For daytime use in a normal room it is a non-issue, but if you plan to sleep next to it in a van or a small bedroom, a quieter model is worth considering.\"},{\"q\":\"Can the Delta 2 run a refrigerator?\",\"a\":\"Yes. With 1800W of output and 1024 Wh of capacity it handles a full-size fridge for roughly most of a day, since fridges cycle on and off rather than drawing continuously. Adding solar extends that considerably during a longer outage.\",\"href\":\"\u002Fportable-power\u002Ftool\u002Fpower-station-runtime-calculator\",\"linkText\":\"Estimate fridge runtime\"}]",{"title":287,"searchDepth":288,"depth":288,"links":2768},[2769,2770,2775,2780,2781,2782],{"id":2611,"depth":288,"text":2615},{"id":672,"depth":288,"text":677,"children":2771},[2772,2773,2774],{"id":2663,"depth":798,"text":2664},{"id":2670,"depth":798,"text":2671},{"id":2677,"depth":798,"text":2678},{"id":705,"depth":288,"text":710,"children":2776},[2777,2778,2779],{"id":2692,"depth":798,"text":2693},{"id":2699,"depth":798,"text":2700},{"id":2706,"depth":798,"text":2707},{"id":737,"depth":288,"text":741},{"id":760,"depth":288,"text":765},{"id":276,"depth":288,"text":281},"My EcoFlow Delta 2 review after living with it: 1024 Wh, LiFePO4, fast charging. Where it holds up, where newer rivals have caught it, and who should buy it.",{},{"title":2600,"description":2783},"portable-power\u002Freview\u002Fecoflow-delta-2-review","FMsEfNf8qonB5lmpFgXTfcJt2IEfyoTPt65hxhFD9bg",{"id":2789,"title":2790,"body":2791,"date":296,"description":3052,"extension":298,"meta":3053,"navigation":300,"path":877,"seo":3054,"silo":2272,"stem":3055,"updated":305,"__hash__":3056},"content\u002Fportable-power\u002Ftool\u002Fpower-station-runtime-calculator.md","Power Station Runtime Calculator: How Long Will It Last?",{"type":8,"value":2792,"toc":3038},[2793,2796,2803,2806,2813,2816,2821,2824,2828,2831,2835,2838,2841,2848,2851,2962,2965,2972,2975,2978,2981,2984,2987,2990,2993,2996,2998,3000,3008,3013,3030,3035],[11,2794,2795],{},"\"How long will it actually last?\" is the question everyone asks and almost no product page answers honestly. The marketing arithmetic assumes a perfect world with zero losses. Real batteries don't work that way.",[11,2797,2798,2799,2802],{},"The calculator below gives a realistic estimate for ",[32,2800,2801],{},"one appliance on one power station",". Pick your capacity and your device, and it accounts for inverter losses and for the fact that things like fridges cycle on and off rather than running flat out.",[826,2804],{":capacity":2398,"cta-to":179,"cta-label":2805},"See the full buying guide",[18,2807,2809,2812],{"id":2808},"how-the-runtime-is-calculated",[22,2810],{"className":2811,"name":1840},[25]," How the runtime is calculated",[11,2814,2815],{},"The honest formula is simpler than it looks:",[11,2817,2818],{},[32,2819,2820],{},"Runtime (hours) = Usable capacity (Wh) \u002F Appliance draw (W)",[11,2822,2823],{},"Two corrections turn the fantasy number into a realistic one.",[679,2825,2827],{"id":2826},"usable-capacity-not-rated-capacity","Usable capacity, not rated capacity",[11,2829,2830],{},"You lose roughly 10 to 15% to inverter and conversion losses, so a 1,000 Wh station delivers closer to 850 to 900 Wh at the outlet. The calculator uses the usable figure, which is why its answers are lower — and more honest — than a simple division.",[679,2832,2834],{"id":2833},"duty-cycle-for-anything-that-cycles","Duty cycle, for anything that cycles",[11,2836,2837],{},"A fridge doesn't draw its rated wattage continuously. It runs, reaches temperature, shuts off, and repeats all day. So a fridge \"rated\" at 150W might average 50 to 70W over 24 hours. The calculator factors this in for cycling appliances.",[11,2839,2840],{},"Ignore both corrections and you'll overestimate runtime by a wide margin. That's the single most common reason people feel let down by a unit that was working exactly as designed.",[18,2842,2844,2847],{"id":2843},"rough-runtime-by-capacity",[22,2845],{"className":2846,"name":885},[25]," Rough runtime by capacity",[11,2849,2850],{},"Ballpark figures, losses included. Treat them as a starting point and confirm with your own appliance's wattage.",[52,2852,2853,2869],{},[55,2854,2855],{},[58,2856,2857,2860,2863,2866],{},[61,2858,2859],{},"Appliance (typical draw)",[61,2861,2862],{},"500 Wh",[61,2864,2865],{},"1000 Wh",[61,2867,2868],{},"2000 Wh",[71,2870,2871,2885,2898,2911,2922,2934,2948],{},[58,2872,2873,2876,2879,2882],{},[76,2874,2875],{},"Phone charge (~15W)",[76,2877,2878],{},"~25+ charges",[76,2880,2881],{},"~50+ charges",[76,2883,2884],{},"~100+ charges",[58,2886,2887,2890,2893,2895],{},[76,2888,2889],{},"Laptop (~50W)",[76,2891,2892],{},"~8 to 9 h",[76,2894,946],{},[76,2896,2897],{},"~34 h",[58,2899,2900,2903,2905,2908],{},[76,2901,2902],{},"CPAP machine (~40W, no heat)",[76,2904,972],{},[76,2906,2907],{},"~21 h",[76,2909,2910],{},"~42 h",[58,2912,2913,2916,2918,2920],{},[76,2914,2915],{},"Mini fridge (cycling, ~40W avg)",[76,2917,972],{},[76,2919,2907],{},[76,2921,2910],{},[58,2923,2924,2927,2930,2932],{},[76,2925,2926],{},"Full-size fridge (cycling, ~60W avg)",[76,2928,2929],{},"~7 h",[76,2931,931],{},[76,2933,975],{},[58,2935,2936,2939,2942,2945],{},[76,2937,2938],{},"Coffee maker (~1000W, brief)",[76,2940,2941],{},"a few brews",[76,2943,2944],{},"several brews",[76,2946,2947],{},"many brews",[58,2949,2950,2953,2956,2959],{},[76,2951,2952],{},"Space heater (1500W)",[76,2954,2955],{},"~20 min",[76,2957,2958],{},"~35 min",[76,2960,2961],{},"~70 min",[11,2963,2964],{},"Notice the bottom rows. Anything that heats drains a battery fast, and that's physics rather than a weak unit. To run heating appliances for meaningful time you need far more capacity or a different power source entirely.",[18,2966,2968,2971],{"id":2967},"which-capacity-should-you-choose",[22,2969],{"className":2970,"name":209},[25]," Which capacity should you choose",[11,2973,2974],{},"Three tiers, based on what this arithmetic usually tells people:",[679,2976,2862],{"id":2977},"_500-wh",[11,2979,2980],{},"Electronics, lights, a fan, a CPAP machine for one night. Ideal for light camping. Not enough for a fridge overnight.",[679,2982,2865],{"id":2983},"_1000-wh",[11,2985,2986],{},"The popular middle, and the right answer for most buyers. A fridge for most of a day, a home office backup, a capable camping unit.",[679,2988,2383],{"id":2989},"_2000-wh-and-up",[11,2991,2992],{},"Longer outages, several appliances, or pairing with solar so you recharge daily and effectively run indefinitely in good weather.",[183,2994],{"id":2995},"ecoflow-river-3-plus",[183,2997],{"id":2168},[183,2999],{"id":185},[18,3001,3003,3007],{"id":3002},"if-youre-planning-for-a-household-outage",[22,3004],{"className":3005,"name":3006},[25],"solar:arrow-right-bold-duotone"," If you're planning for a household outage",[11,3009,3010,3011,181],{},"This calculator answers the single-appliance question. Planning a blackout is a different problem: several loads run at once, they don't overlap perfectly, and what you actually need to know is whether the battery gets you from evening to morning. That maths lives in the ",[172,3012,252],{"href":251},[11,3014,3015,3016,3018,3019,3022,3023,3027,3028,181],{},"Once you have a target capacity, the ",[172,3017,180],{"href":179}," covers the other two specs that matter — chemistry and inverter output — and the ",[172,3020,3021],{"href":2270},"power station vs gas generator comparison"," helps if you're still weighing fuel-based backup. More tools are in ",[172,3024,3026],{"href":3025},"\u002Fportable-power\u002Ftool","the portable power calculators",", and the wider category is on ",[172,3029,2237],{"href":174},[18,3031,3032,281],{"id":276},[22,3033],{"className":3034,"name":280},[25],[283,3036],{":items":3037},"[{\"q\":\"How long will a 1000Wh power station last?\",\"a\":\"It depends entirely on the load. Roughly seventeen hours for a 50W laptop, most of a day for a cycling fridge, or about thirty-five minutes for a 1500W space heater. Usable capacity after losses is closer to 850 to 900 Wh, which the calculator already accounts for.\"},{\"q\":\"Why does my power station die faster than the math says?\",\"a\":\"Two reasons. You lose ten to fifteen percent of rated capacity to inverter losses, and heating appliances draw far more than most people expect. Cold weather makes both worse, since batteries hold less when they are cold.\"},{\"q\":\"How do I find my appliance's wattage?\",\"a\":\"Check the label on the device or its power brick and look for watts, or multiply amps by volts. For anything that cycles, such as a fridge, the average draw over a day is much lower than the peak rating on the label, so a plug-in energy meter gives a far more useful number.\"},{\"q\":\"Can I use this to plan for a power outage?\",\"a\":\"For a single appliance, yes. For a whole household outage with several things running at once, use the blackout calculator instead, since the loads have to be summed and the overnight window matters more than raw hours.\",\"href\":\"\u002Fhome-backup\u002Ftool\u002Fhome-battery-blackout-runtime-calculator\",\"linkText\":\"Plan a whole outage\"}]",{"title":287,"searchDepth":288,"depth":288,"links":3039},[3040,3044,3045,3050,3051],{"id":2808,"depth":288,"text":2812,"children":3041},[3042,3043],{"id":2826,"depth":798,"text":2827},{"id":2833,"depth":798,"text":2834},{"id":2843,"depth":288,"text":2847},{"id":2967,"depth":288,"text":2971,"children":3046},[3047,3048,3049],{"id":2977,"depth":798,"text":2862},{"id":2983,"depth":798,"text":2865},{"id":2989,"depth":798,"text":2383},{"id":3002,"depth":288,"text":3007},{"id":276,"depth":288,"text":281},"Free power station runtime calculator. Estimate how long a 500, 1000 or 2000 Wh station runs your fridge, CPAP, laptop or coffee maker, with real losses included.",{},{"title":2790,"description":3052},"portable-power\u002Ftool\u002Fpower-station-runtime-calculator","6fc4T-XV4Vbxys_64cpL2nZ4uScOnOXuk74orRR1E-0",{"id":3058,"title":3059,"body":3060,"date":3194,"description":3195,"extension":298,"meta":3196,"navigation":300,"path":584,"seo":3197,"silo":303,"stem":3198,"updated":305,"__hash__":3199},"content\u002Fhome-backup\u002Fguide\u002Findex.md","Home Battery Backup Buying Guides",{"type":8,"value":3061,"toc":3187},[3062,3069,3072,3080,3113,3121,3127,3133,3139,3142,3150,3157,3168,3173,3176,3184],[11,3063,3064,3065,3068],{},"Oversizing is the expensive mistake in ",[172,3066,3067],{"href":262},"home backup",", and it happens because people size for a worst case they've never actually experienced. A battery built to run everything for three days costs many times one built to carry the essentials overnight, and the second is what most households need.",[11,3070,3071],{},"These guides work through the decision in the order that keeps the cost honest.",[18,3073,3075,3079],{"id":3074},"what-i-look-at-in-this-order",[22,3076],{"className":3077,"name":3078},[25],"solar:sort-by-time-bold-duotone"," What I look at, in this order",[3081,3082,3083,3089,3095,3101,3107],"ol",{},[215,3084,3085,3088],{},[32,3086,3087],{},"What exactly you're backing up."," Write the list of appliances before looking at any product. This is the step people skip, and it's the one that determines everything downstream.",[215,3090,3091,3094],{},[32,3092,3093],{},"Kilowatt-hours per day, honestly counted."," Real consumption over 24 hours, accounting for the fact that fridges and furnace fans cycle rather than run continuously.",[215,3096,3097,3100],{},[32,3098,3099],{},"How the power reaches those circuits."," Cords, inlet box, transfer switch or automatic panel. Often the largest single line in the budget, and the one no product page mentions.",[215,3102,3103,3106],{},[32,3104,3105],{},"The expandability path and what it really costs."," If the plan is \"start small, add batteries later\", price the expansion modules now — on some systems they cost nearly as much as the base unit.",[215,3108,3109,3112],{},[32,3110,3111],{},"The recharge path during a multi-day outage."," A battery with no way to refill is a one-shot device. Solar recharging while disconnected from the grid is a specific capability worth confirming rather than assuming.",[18,3114,3116,3120],{"id":3115},"three-budget-bands-and-what-changes-between-them",[22,3117],{"className":3118,"name":3119},[25],"solar:wallet-money-bold-duotone"," Three budget bands, and what changes between them",[11,3122,3123,3126],{},[32,3124,3125],{},"Essentials."," A single plug-in unit covering fridge, internet, phones and lights through an overnight outage. No electrician. The band that quietly satisfies most people who came in asking about whole-home backup.",[11,3128,3129,3132],{},[32,3130,3131],{},"Essentials, wired."," The same class of battery, plus the electrical work to feed real circuits — so hard-wired lights and the furnace fan come back too. One electrician visit, and the largest jump in usefulness per dollar in this category.",[11,3134,3135,3138],{},[32,3136,3137],{},"Whole-home."," A permanently installed system with automatic switchover, sized to carry large appliances. Permits, panel work, professional installation. Genuinely right if you own the house, stay put, and outages are long or frequent.",[11,3140,3141],{},"The jump from the first band to the second buys capability. The jump to the third mostly buys convenience and the ability to run the loads most households can do without for a day.",[18,3143,3145,3149],{"id":3144},"which-guide-you-want",[22,3146],{"className":3147,"name":3148},[25],"solar:signpost-2-bold-duotone"," Which guide you want",[11,3151,3152,3153,3156],{},"If you need to turn a list of appliances into a battery size without overpaying, that's the ",[172,3154,3155],{"href":241},"home battery backup sizing guide"," — the complete version of the method above, including how to count loads that cycle.",[11,3158,3159,3160,3162,3163,3165,3166,181],{},"If you're still deciding between a plug-in unit and a wired system, size later and read ",[172,3161,373],{"href":301}," first. For a verdict on a specific system, ",[172,3164,273],{"href":272},". To put numbers on your own outage, ",[172,3167,1028],{"href":1027},[18,3169,3170,281],{"id":276},[22,3171],{"className":3172,"name":280},[25],[283,3174],{":items":3175},"[{\"q\":\"How many kWh do I need for home backup?\",\"a\":\"It depends entirely on your appliance list and how long you want to carry it. The reliable method is to add up what those specific appliances consume over 24 hours, remembering that fridges and furnace fans cycle rather than run constantly, and then multiply by the number of days you want to cover.\",\"href\":\"\u002Fhome-backup\u002Fguide\u002Fhome-battery-backup-sizing-guide\",\"linkText\":\"Work through the method\"},{\"q\":\"What is the oversizing trap?\",\"a\":\"Sizing for a scenario you have never actually faced, usually several days of running everything including air conditioning. Each extra kilowatt-hour costs real money and mostly sits unused, while the thing that limits you during a genuine outage is more often which circuits you can reach than how much energy you stored.\"},{\"q\":\"Should I buy a battery that can expand later?\",\"a\":\"Only after checking what the expansion modules cost. Expandability is a genuine advantage when the modules are reasonably priced, and a marketing point when they cost nearly as much as the original unit, which is common enough to be worth verifying before you commit.\"}]",[18,3177,3179,3183],{"id":3178},"all-home-backup-buying-guides",[22,3180],{"className":3181,"name":3182},[25],"solar:book-bold-duotone"," All home backup buying guides",[3185,3186],"type-articles",{},{"title":287,"searchDepth":288,"depth":288,"links":3188},[3189,3190,3191,3192,3193],{"id":3074,"depth":288,"text":3079},{"id":3115,"depth":288,"text":3120},{"id":3144,"depth":288,"text":3149},{"id":276,"depth":288,"text":281},{"id":3178,"depth":288,"text":3183},"2026-07-08","Home backup guides: count your real kWh per day, choose essentials or whole-home, pick a switchover method, and avoid the oversizing trap that costs thousands.",{},{"title":3059,"description":3195},"home-backup\u002Fguide\u002Findex","_6fLeILxbxDuoGNYspvIXSM_p8m-_iCQ8dNLvXU7xzQ",[3201],{"path":241,"title":309,"date":296},[3203],{"id":308,"title":309,"body":3204,"date":296,"description":611,"extension":298,"meta":3416,"navigation":300,"path":241,"seo":3417,"silo":303,"stem":614,"updated":305,"__hash__":615},{"type":8,"value":3205,"toc":3407},[3206,3208,3210,3215,3223,3228,3230,3244,3248,3253,3255,3257,3317,3321,3326,3328,3332,3340,3346,3350,3355,3373,3378,3380,3386,3388,3390,3400,3405],[11,3207,314],{},[11,3209,317],{},[18,3211,3212,325],{"id":320},[22,3213],{"className":3214,"name":324},[25],[212,3216,3217,3219,3221],{},[215,3218,330],{},[215,3220,333],{},[215,3222,336],{},[18,3224,3225,344],{"id":339},[22,3226],{"className":3227,"name":343},[25],[11,3229,347],{},[212,3231,3232,3236,3240],{},[215,3233,3234,355],{},[32,3235,354],{},[215,3237,3238,361],{},[32,3239,360],{},[215,3241,3242,367],{},[32,3243,366],{},[11,3245,370,3246,181],{},[172,3247,373],{"href":301},[18,3249,3250,381],{"id":376},[22,3251],{"className":3252,"name":380},[25],[11,3254,384],{},[11,3256,387],{},[52,3258,3259,3267],{},[55,3260,3261],{},[58,3262,3263,3265],{},[61,3264,396],{},[61,3266,399],{},[71,3268,3269,3275,3281,3287,3293,3299,3305,3311],{},[58,3270,3271,3273],{},[76,3272,406],{},[76,3274,409],{},[58,3276,3277,3279],{},[76,3278,414],{},[76,3280,417],{},[58,3282,3283,3285],{},[76,3284,422],{},[76,3286,417],{},[58,3288,3289,3291],{},[76,3290,429],{},[76,3292,432],{},[58,3294,3295,3297],{},[76,3296,437],{},[76,3298,440],{},[58,3300,3301,3303],{},[76,3302,445],{},[76,3304,448],{},[58,3306,3307,3309],{},[76,3308,453],{},[76,3310,456],{},[58,3312,3313,3315],{},[76,3314,461],{},[76,3316,464],{},[11,3318,467,3319,471],{},[32,3320,470],{},[18,3322,3323,478],{"id":474},[22,3324],{"className":3325,"name":157},[25],[11,3327,481],{},[11,3329,3330],{},[32,3331,486],{},[212,3333,3334,3336,3338],{},[215,3335,491],{},[215,3337,494],{},[215,3339,497],{},[11,3341,500,3342,504,3344,508],{},[32,3343,503],{},[32,3345,507],{},[11,3347,511,3348,181],{},[172,3349,252],{"href":251},[18,3351,3352,521],{"id":516},[22,3353],{"className":3354,"name":520},[25],[212,3356,3357,3361,3365,3369],{},[215,3358,3359,529],{},[32,3360,528],{},[215,3362,3363,535],{},[32,3364,534],{},[215,3366,3367,541],{},[32,3368,540],{},[215,3370,3371,547],{},[32,3372,546],{},[18,3374,3375,555],{"id":550},[22,3376],{"className":3377,"name":554},[25],[11,3379,558],{},[11,3381,561,3382,565,3384,181],{},[172,3383,564],{"href":301},[172,3385,569],{"href":568},[183,3387],{"id":572},[183,3389],{"id":575},[11,3391,578,3392,581,3394,586,3396,589,3398,181],{},[172,3393,263],{"href":262},[172,3395,585],{"href":584},[172,3397,273],{"href":272},[172,3399,593],{"href":592},[18,3401,3402,281],{"id":276},[22,3403],{"className":3404,"name":280},[25],[283,3406],{":items":601},{"title":287,"searchDepth":288,"depth":288,"links":3408},[3409,3410,3411,3412,3413,3414,3415],{"id":320,"depth":288,"text":325},{"id":339,"depth":288,"text":344},{"id":376,"depth":288,"text":381},{"id":474,"depth":288,"text":478},{"id":516,"depth":288,"text":521},{"id":550,"depth":288,"text":555},{"id":276,"depth":288,"text":281},{},{"title":309,"description":611},1786721998751]