How long will a power station run a space heater?

At 1,500 W nonstop, about 36 minutes on a 1,070 Wh Jackery Explorer 1000 v2 and about 2.3 hours on a 4,096 Wh EcoFlow DELTA Pro 3, using an 85% conversion factor. On a 700 W low setting the Jackery lasts about 1.3 hours. A thermostat that cycles the heater off stretches those times, by an amount we can't know in advance.

What size power station do I need for a space heater?

For a 1,500 W heater, one with 1,500 W or more of continuous AC output. Capacity sets the hours: every 1,000 Wh of usable energy runs a 1,500 W heater for 40 minutes. A 200 W personal heater, which Lasko sells for desk use rather than heating a room, runs about 4.5 hours on the same 1,070 Wh station.

Can a power station run a space heater?

Q: Can a power station run a space heater?

Only for a short time. The heaters we read top out at 1,500 W: Lasko rates its 754200 at 900 to 1,500 W and De'Longhi rates its TRD40615E oil-filled radiator at 700 to 1,500 W. A station needs at least 1,500 W of continuous AC output to run one on high; 8 of the 9 stations in our table have it, but the EcoFlow RIVER 3 Plus (600 W) does not.

For minutes to a couple of hours. A 1,500 W heater on high empties a 1,070 Wh station in about 36 minutes. Pick your heater and setting to see the time, and which stations can put out the watts at all.

Last updatedOct 18, 2026

Heater ratingsLasko and De'Longhi product pages and manuals, read Oct 18, 2026

Your heater and station

Your heater

Heater

Setting

Heater watts (in watts)Filled from the maker's rating; type your own from the label

Share of time the element is on example (percent)A thermostat switches it off once the room warms. 100% is the cautious case

Station

Power station example

Rated capacity (in watt-hours)From the maker's spec page

AC output, continuous (in watts)

Inverter and conversion efficiency (percent)Jackery's published runtime factor is 0.85

Share of capacity you can use example (percent)Depth of discharge

Station's own idle draw example (in watts)BLUETTI gives about 15 W for its AC180

Result

Every station against this heater

Time from full at your setting. Gray rows can't put out the heater's watts. The shaded row is the smallest station in our table that runs it. Prices are what each maker's US store showed on Oct 18, 2026.

Links marked “affiliate link” go through Awin to that maker’s US store (Jackery or BLUETTI); if you buy, the maker may pay us a commission at no cost to you. It never changes the hours, the checks or which row is shaded. Affiliate disclosure.

Every station in our table against this load
Station	Capacity, Wh	Runs it for	AC output, W	Surge, W	Store price	Verdict

Heater ratings we read

Maker ratings, read Oct 18, 2026. Heat out = watts × 3.412 Btu per watt-hour (EIA)
Heater	Setting	Watts	Heat out, Btu/h	Minutes per 1 kWh usable

A 1,070 Wh station gives about 910 Wh usable at Jackery's 0.85 factor. Every electric resistance heater turns its watts into the same heat, so a 1,500 W ceramic heater and a 1,500 W oil-filled radiator drain a station equally fast.

How the time is worked out

Hours = capacity × share you can use × efficiency ÷ (heater watts × share of time on + station idle draw). The heater figure is the maker's rating for that setting. A resistance heater draws close to its rating whenever its element is on and has no motor to start, so the output check compares the rating with the station's continuous AC output and no start-up surge is added. Heat output uses the EIA conversion of 3,412 Btu per kilowatt-hour (EIA). Sources are on Methods and sources.

A station is a poor way to heat a room for long: a heater on high takes more power than anything else on our appliance list, more than a microwave. If you have a gas furnace, the station only has to run its blower, which takes far less; see a gas furnace on a power station.

Gas furnace on a station
Run the blower and let the gas make the heat.
Size a station
Fit a heater into a whole outage day with the fridge and lights.
Solar recharge
How much winter sun puts back, in your state's worst month.