Heat the person rather than the room. On the largest machine in this library that states enough about itself to be divided, a heated blanket runs for 23 h and a 1,500 W space heater for 1.1 h — the same battery, about 22× the warmth in time. All 12 published US machines here carry the blanket; only 5 pass the heater outright.
One caveat belongs in the first paragraph rather than a footnote. The only citable wattage for a heated blanket in this library is a European manual’s, because US makers print theirs on the product’s own label instead of in any document; the engine falls through to that figure for US pairings, and every blanket hour above rests on it.
One resistive load against another. Neither has a start-up worth checking, so the only thing separating them is how many watts of heat they make and where they put it.
Heated blanket, single size60 W Official spec · verified 2026-08-01 · high confidence
A European manufacturer’s technical data table, stating an input of 55–65 W at 220–240 V.
Heated blanket, double size92 W Official spec · verified 2026-08-01 · high confidence
The same maker’s larger model, 85–100 W. Even at the top of that band the comparison below does not change its shape.
Electric space heater1,500 W Official spec · verified 2026-08-01 · high confidence
The resistive heater this library holds. There is no efficiency to shop for on a load like this: a heating element turns whatever it is given into heat.
How long a blanket is designed to run10 h Official spec · verified 2026-08-01 · medium confidence
Not a habit but a designed limit: both US manuals on this record document an automatic switch-off after this long, and three hours for a throw.
Official spec · verified 2026-08-03 · electric blanket + space heater records · manufacturer manuals
Both loads on the same two machines, computed on this build
The pairs are deliberately matched: same station, different appliance. Nothing about the power station changes between the rows in each pair — only what is plugged into it.
BLUETTI Elite 200 V2 × electric blanket60 W runningRuns it2.3%
23 h
23 h at two per cent of continuous output. A full night with most of the battery left.
BLUETTI Elite 30 V2 × electric space heater (1500 W)1,500 W runningToo big250%
limited by continuous output
Refused: the heater asks two and a half times this machine’s continuous output. The hour figure beside it is what the battery would have delivered had the inverter carried the load, and the verdict is that it will not.
This is the clearest case on the site of a question that no ranked list of power stations can answer. Every machine in the library passes the blanket, so ranking them against it separates nothing; 12 of 12 rows are the same verdict. The decision that actually changes the outcome is which appliance you plug in, and that decision costs a fraction of what the next battery size up costs.
Why the blanket figure is European, stated plainly
The US half of this record carries a dated absence block rather than a number. Two US heated-bedding manuals were re-read for a wattage on 2026-08-07: both state the supply — a 110–120 V outlet in one, a standard 120 V outlet at 60 Hz in the other — and both document the automatic shut-off, and neither carries a technical data table of the kind the European maker prints, so we found no published US wattage in either. The record’s own note expects that figure to live on the product’s physical rating label, and a label stitched into a blanket is not a document we can cite. So the engine resolves the US region to the record’s top-level figure, which is the European one. The quantity at stake is tens of watts against a load that every machine here clears by a wide margin, and the ratio this article turns on survives it — but the substitution is real and it belongs on the page rather than in a footnote.
A European maker’s technical data table states 55–65 W for a single and 85–100 W for a double, on a 220–240 V supply. There is no equivalent figure for a US model in this library: two US heated-bedding manuals were re-read on 2026-08-07 and both state the outlet voltage and the automatic shut-off without a technical data table, so we found no published US wattage in either. Our engine falls through to the European figure for US pairings.
How long will a power station run a space heater?
About an hour on a 2,000 Wh class machine, and that is the whole battery. The record here is a 1,500 W resistive heater, and a heating element simply turns whatever it is given into heat, so there is nothing to shop for on efficiency: five of the twelve published US machines here pass it outright, three are downgraded and four refuse it. A heated blanket on the same machine runs for roughly a day.
How do you stay warm during a power outage without a generator?
Move the heat closer to the person. On one 2,000 Wh class battery, our engine computes about 23 hours for a heated blanket against 1.1 hours for a 1,500 W space heater — the same machine, about twenty times the duration, because one appliance warms a bed and the other tries to warm a room through the walls. If the house has gas heat, powering the furnace blower is the other efficient route, though this library will not issue a pass on that load.