Search for backup power and you’ll see “solar generator” and “home battery backup system” used almost interchangeably. They’re related, but they’re built to solve different problems, and picking the wrong one means either overpaying or ending up under-powered when the grid actually goes down.
What a solar generator actually is
A solar generator is really just a portable power station — a battery, an inverter, and a charge controller packed into one case — that’s marketed around pairing with a folding solar panel. Anker SOLIX, EcoFlow, Jackery, and Bluetti all make these. They’re plug-and-play, you can carry them, and they typically run anywhere from a few hundred to a few thousand watt-hours. Good for keeping a fridge, some lights, and a few devices alive during a shorter outage, or for camping and job sites.
What a home battery actually is
A home battery — like a Tesla Powerwall or a Generac PWRcell — is a fixed, professionally installed system wired directly into your home’s electrical panel, usually alongside rooftop solar. It’s sized in kilowatt-hours (typically 10-15+ kWh per unit), can power your whole home or dedicated circuits automatically when the grid drops, and switches over without you doing anything. The tradeoff is cost: installation usually runs into five figures, versus a few hundred to low thousands for a portable unit.
Picking a solar generator for home backup: start with your fridge
Most people buying a solar generator for outages want one thing first: keep the fridge cold. A typical fridge averages about 60 watts over a day, which is roughly 1.4 kWh. That one number makes sizing easy.
About 1 kWh: a short outage, fridge only. The EcoFlow Delta 3 Plus (1,024Wh) runs an average fridge for roughly 14 to 15 hours. That’s enough for an overnight outage, and you can add batteries later.
About 2 kWh: a full day, fridge plus a few extras. The Jackery HomePower 2000 Plus v2 (2,048Wh) and the BLUETTI Elite 200 V2 (2,073Wh) cover a fridge for about 29 to 31 hours, or a fridge, router and lights for most of a day.
About 3 kWh: a long outage or bigger loads. The Jackery HomePower 3000 and the Anker SOLIX F3000 (both 3,072Wh, 3,600W output) run a fridge for close to two days and can handle things like a well pump or a window AC for shorter stretches.
The solar part. Panels rarely deliver their full rated wattage, so to keep up with a fridge from sunlight alone, plan on roughly 400 watts of panels in good sun. Two 200W panels such as the ALLPOWERS SE200 or the Jackery SolarSaga 200W (made for Jackery stations) get you there. Check the panel’s voltage against your power station’s solar input before you buy.
Which one actually fits your situation
If you’re dealing with occasional short outages and want something affordable and flexible (and maybe useful for camping too), a portable power station covers that. If you’re in an area with frequent, multi-day outages and you’re already considering solar, a whole-home battery is the more serious long-term answer — just budget for a proper installer quote, not an Amazon checkout.
Thinking about more than one upgrade? Our Whole-Home Energy Calculator lets you mix gadgets from every category and see the electricity your setup adds or saves each month, plus the net change on your bill.