The short answer: for the outage most homes actually have — a day to three days, fridge, Wi-Fi, a few lights, maybe a CPAP or a medical device — a solar generator wins on safety, noise, and simplicity. Our pick is the Jackery HomePower 3000. A gas generator only pulls ahead when the outage runs long and dark, with no sun to recharge a battery and no end in sight. Here is the comparison, point by point, with the numbers behind each one.
The six things that actually decide it
Every “which generator” argument online eventually comes down to six factors. Weigh them against your own outage, not someone else’s.
| Factor | Solar generator | Gas generator |
|---|---|---|
| Runs indoors | Yes, zero exhaust | No, outdoors only |
| Noise | ~30 dB, near-silent | 60 to 90 dB |
| Fuel | None — battery plus optional solar panels | Gasoline, stored and rotated |
| Starting | Push a button, any temperature | Can fail cold or after sitting |
| Long, dark outages | Limited by battery capacity | Runs as long as fuel arrives |
| Whole-house 240V, cheaply | Expensive at that scale | Cheap, widely available |
No unit wins every row. The question is which rows matter for the outage you are actually planning for.
Indoors versus outdoors: the safety gap
This is the row that matters most and gets argued about least, because the stakes are highest. A gas generator burns fuel and produces carbon monoxide, an odorless, colorless gas that builds to lethal levels in minutes inside a garage, a shed, or on a covered porch — even with a door propped open. Every major outage produces carbon monoxide deaths, almost always from a generator run too close to the house, usually by someone trying to keep it dry or out of the wind during the exact storm that caused the outage.
A battery-based solar generator has no combustion and no exhaust. It can run in a closet, a hallway, or a shuttered, boarded-up room, which matters most in exactly the storms — hurricanes, blizzards — where going outside to check on a generator is dangerous in its own right. If you take one fact from this page, take this one: a solar generator removes an entire category of risk that a gas generator cannot avoid, no matter how carefully you run it.
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Noise: 30 decibels versus 90
A Jackery solar generator runs near 30 decibels — about as loud as a quiet refrigerator, and quiet enough to sit in the same room without noticing it. A portable gas generator runs 60 to 90 decibels, loud enough to carry through walls and across a yard, and loud enough that running one all night draws complaints in most neighborhoods.
That difference matters more than it sounds like on paper. An outage often means running the unit for days, not hours, and a machine you can hear from two houses away is a machine you either shut off overnight — losing the fridge — or run anyway and strain the neighbors you’ll need to lean on if the outage gets worse.
Fuel: none versus a supply chain
A gas generator is only as good as the gasoline you have on hand, and that is the weak link in almost every real outage. After a hurricane or a major ice storm, stations without power often can’t pump even when they have fuel in the ground, so a five-gallon can beside the generator is frequently a one-day plan stretched to cover a three-day outage. Stored gasoline also degrades over months without a stabilizer, so a can filled last spring may not run cleanly when the storm actually arrives.
A solar generator needs none of that. It runs on the charge already in the battery, and its solar panels — included with the HomePower 3000 — add power back during daylight even while the outage continues. There is no can to refill, no station to find, and no fuel to go stale in the garage between storms.
Starting reliability
A battery-based unit starts at the push of a button, in any temperature, whether it ran last month or has sat untouched for a year, as long as it was charged. A small gas engine is a different story: cold weather makes them harder to start, ethanol-blended fuel gums up carburetors after a season of sitting, and a generator that starts fine in the garage in October can refuse to turn over during the January storm it was bought for. The maintenance a gas generator needs to stay reliable — fresh fuel, occasional exercise runs, oil changes — is easy to skip and expensive to have skipped when the power actually goes out.
Where gas still wins: the long, dark outage
None of this makes a battery the right answer for every outage. A solar generator is limited by its capacity: a 3,072Wh HomePower 3000 covers a day to a day and a half of essentials on the battery alone, and after that it needs either a wall outlet or sun to keep going. In a week of overcast weather with the grid still down — the kind of stretch that follows a major ice storm or a slow-moving hurricane — a battery that isn’t recharging eventually runs out, while a gas generator keeps making power for as long as fuel keeps arriving.
A gas generator also wins on cheap, high-wattage 240V output. Running central air conditioning or a well pump off a battery takes a unit in the class of the Jackery Solar Generator 5000 Plus, at a real cost. A gas generator delivering the same 240V output costs meaningfully less upfront, if you’re willing to accept the noise, the fuel logistics, and the outdoor-only rule that come with it.
What it actually costs, honestly
Upfront, a basic portable gas generator is usually cheaper per watt than a comparable solar generator. That gap is real and worth naming rather than glossing over. It narrows, though, once you count what a gas generator costs to keep ready: fuel bought and rotated every season, stabilizer, occasional oil changes, and — for a safe, code-legal setup — a transfer switch installed by an electrician, which a battery-based unit can also use but doesn’t strictly require for basic loads.
A solar generator has no fuel cost, no oil, and no engine to service. Its solar panels are a one-time cost, included with the HomePower 3000, that keep paying back every sunny day of the outage and every day after it, if you also use it for camping or as a power bank. Over a few years, the total cost of ownership sits closer together than the sticker prices suggest — the gas generator wins on day one, the battery closes ground every year after.
Runtime on the loads that matter
Here is what a HomePower 3000 carries on battery alone, no solar, against the loads most households actually run in an outage.
| Load set | Energy per day | HomePower 3000 (3,072Wh) |
|---|---|---|
| Fridge, Wi-Fi, lights, phones | ~1,700Wh | About 1.5 days |
| Add a CPAP overnight | ~2,100Wh | About 1.5 days |
| Add a gas furnace blower, deep cold | ~6,000Wh | About half a day |
| Add a small window AC, hot night | ~7,000Wh | About half a day |
Every figure is on the battery alone. Its included panels add roughly 1,500 to 2,000Wh on a sunny day, which is what turns a day-and-a-half unit into a multi-day one whenever the sun comes back — the exact mechanism a gas generator has no equivalent for, and the exact mechanism that fails in a week of solid overcast.
Who should buy which
- Most homes, most outages (a day to three days, essentials on the list): the solar generator. It’s quieter, safer indoors, needs no fuel run, and starts every time.
- Rural home, well pump, or whole-house 240V on a budget: the gas generator, or a 240V-capable battery like the Solar Generator 5000 Plus if the extra cost is worth losing the noise and fumes.
- Storm-prone region with a real chance of a week-plus outage: consider both — the battery for the quiet, everyday backup, the gas generator in reserve for the outage that outlasts it.
- Medical device in the house (CPAP, oxygen, dialysis): the solar generator, specifically because it can sit beside the bed and start silently the instant the grid drops, with no engine to start and no fumes to manage.
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The bottom line
A gas generator is not obsolete — it is still the cheaper way to run a house full of 240V loads for a week with nothing but a fuel can. But that is a narrower case than most people assume when they start shopping, and it comes with a carbon monoxide risk that a battery simply doesn’t carry. For the outage most households actually have, a quiet, indoor-safe solar generator that starts instantly and needs no fuel is the better first purchase, and the HomePower 3000 is the one we’d buy. Our full buying guide walks through sizing one for your own home.
Keep reading: Best solar generators for home backup · Jackery HomePower 3000 review · How to size a solar generator for home backup · Can a solar generator run a furnace? · Solar generator for a CPAP