“Solar generators” are batteries — and that’s why they’re not ranked

Last reviewed July 2026.

Search for a quiet generator and half the results are Jackery, EcoFlow, Anker and Bluetti units with “solar generator” in the listing. They are lithium battery power stations: a battery, an inverter and some sockets. Genuinely useful machines — silent, fumeless, safe indoors — but they do not generate anything. They store energy you put in earlier, from a wall socket or a solar panel that is usually sold separately.

Why they can’t sit in a per-watt ranking

• Capacity is the real spec, and it’s finite. A fuel generator’s output is limited by its tank only in hours; refill and it keeps making power. A power station’s watt-hours are the whole budget — when they’re gone, output is zero until you recharge (and recharging during an outage is exactly the hard part).
• Sustained high-draw output is limited. Rated output on a power station is bounded by battery discharge limits and thermal management; holding a heavy load flattens the battery in an hour or two. “Running watts” on a machine that runs out is not the same quantity as running watts on a machine that runs.
• Cost per running watt would flatter or slander them arbitrarily. Divide a power station’s price by its inverter rating and you get a number that ignores watt-hours entirely — the one spec that actually decides what it’s worth. Comparing $/W across the two categories is arithmetic on incompatible units.

What they’re actually good at

Indoors, where a combustion generator can never go: powering a CPAP, phones, a laptop and a fridge through short outages, quietly and without carbon monoxide. If the loads are small and the outages are hours rather than days, a power station may be the right machine — it just isn’t a generator, and it doesn’t compete in a ranking of them.

The honest comparison, if you want one

Compare power stations to each other on price per watt-hour of capacity plus rated inverter output; compare fuel generators on price per running watt plus noise and runtime. Two categories, two denominators. We rank the second and keep the first in its own clearly labeled section on the homepage — sold as generators, listed as what they are.

Generator Score indexes manufacturers’ published specifications and ranks on arithmetic; we test nothing and give no safety advice. Never run a fuel generator indoors, in a garage, or near openings — carbon monoxide is deadly — and a power station’s indoor safety is precisely the one thing a fuel generator can never match. See the CO-shutoff record for who stands behind each fuel machine’s safety system.