Can a portable power station run a space heater?
Yes, but not for long. A 1,500 W space heater on high takes about 1,961 Wh of power station capacity for every hour it heats, and it needs a station rated for at least 1,500 W continuous output. Most mid-size stations run one for well under an hour.
The numbers
Champion's generator wattage chart lists a space heater at 750–1,500 W with no extra starting watts, and Silicon Valley Power's appliance chart lists a 1,500 W portable heater at 1.5 kWh per hour. A resistance heater turns all of that into heat, so a 1,500 W heater on high draws close to 1,500 W the whole time its element is on. We use 1,500 W for high and 750 W for a low setting. Check your heater's label: the wattage is printed on it.
Through an inverter at 85% efficiency, with 90% of rated capacity usable, one hour on high takes about 1,961 Wh of rated capacity, and one hour at 750 W about 980 Wh. For comparison, SVP lists a double/queen electric blanket at 0.75 kWh per night, which works out to about 981 Wh of capacity for an 8-hour night. That's less than one hour of the heater on high.
A thermostat cuts the heater in and out, so in a small, well-insulated room it may heat for only part of each hour. The calculator doesn't model that. Enter the hours the element is actually on, not the hours the heater is plugged in. A plug-in watt meter will tell you.
| Scenario | Wh/day from battery | Min capacity Wh | Cont. W | Surge W |
|---|---|---|---|---|
| 1,500 W on high, 1 h | 1,765 | 1,961 | 1,500 | 1,500 |
| 1,500 W on high, 2 h | 3,529 | 3,922 | 1,500 | 1,500 |
| 1,500 W on high, 4 h | 7,059 | 7,843 | 1,500 | 1,500 |
| 750 W low setting, 1 h | 882 | 980 | 750 | 750 |
| 750 W low setting, 4 h | 3,529 | 3,922 | 750 | 750 |
| Electric blanket (double/queen), 8 h night | 883 | 981 | 94 | 94 |
| 750 W heater 2 h + top-freezer fridge 24 h | 2,925 | 3,250 | 1,150 | 1,950 |
Assumptions: 85% inverter efficiency, 90% of rated capacity usable, no extra margin. Both are planning values, not measurements, and you can change them in the calculator.
Models in our table that fit one hour of a 1,500 W heater on high
Fits (cheapest first):
- Jackery Explorer 2000 v2: 2,042 Wh, 2,200 W / 4,400 W surge, $899 (checked 2026-10-26).
- Anker SOLIX C2000 Gen 2: 2,048 Wh, 2,400 W / 4,000 W surge, $899.99 (checked 2026-10-26).
- EcoFlow DELTA 2 Max: 2,048 Wh, 2,400 W / 4,800 W surge, $1,049 (checked 2026-10-26).
- Anker SOLIX F3800 Plus: 3,840 Wh, 6,000 W / 9,000 W surge, $2,399.99 (checked 2026-10-26).
- EcoFlow DELTA Pro 3: 4,096 Wh, 4,000 W / 8,000 W surge, $2,799 (checked 2026-10-26).
Closest that fall short:
- BLUETTI AC180: 1,152 Wh, 1,800 W / 2,700 W surge, $499 (checked 2026-10-26). Short on capacity.
- Jackery Explorer 1000 v2: 1,070 Wh, 1,500 W / 3,000 W surge, $499 (checked 2026-10-26). Short on capacity.
- Anker SOLIX C1000X: 1,056 Wh, 1,800 W / 2,400 W surge, $469.99 (checked 2026-10-26). Short on capacity.
Continuous watts are the first filter. A station rated below 1,500 W continuous will usually shut off or refuse the load. In our table that rules out Jackery Explorer 300 v2 (300 W), EcoFlow RIVER 3 Plus (600 W) and BLUETTI AC70 (1,000 W). Some brands advertise modes (EcoFlow's X-Boost, Anker's SurgePad) that let a station run heating loads above its rated output. Check your station's manual for what that mode does to the heater's output. We size on the rated continuous watts.
Rough minutes on high for stations that can carry the load (rated Wh × 90% ÷ 1,765 W from the battery): EcoFlow DELTA 3 about 31 min; EcoFlow DELTA 3 Plus about 31 min; Anker SOLIX C1000 Gen 2 about 31 min; Anker SOLIX C1000X about 32 min; Jackery Explorer 1000 v2 about 33 min; BLUETTI AC180 about 35 min; Jackery Explorer 2000 v2 about 62 min; EcoFlow DELTA 2 Max about 63 min; Anker SOLIX C2000 Gen 2 about 63 min; Anker SOLIX F3800 Plus about 118 min; EcoFlow DELTA Pro 3 about 125 min.
What changes the answer
- Heat the person, not the room. An electric blanket, heated mattress pad or a closed-off small room stretches a battery far further than a heater warming open air.
- Low setting. Dropping from 1,500 W to 750 W halves the draw per hour. If your heater has a thermostat, a lower set point also cuts the hours its element is on.
- Recharging. One hour on high uses roughly as much energy as a top-freezer fridge uses in a day and a half. Without solar, a car or a generator to recharge, heat will drain a station fastest of anything in a typical outage plan.
- Safety. CPSC says to plug electric space heaters directly into a wall outlet, never an extension cord or power strip, keep them at least 3 feet from anything that can burn, and turn them off when sleeping. On a power station, plug the heater straight into the station's AC outlet and follow your heater's and station's manuals.
Open this in the calculator. Change the hours, efficiency or days there.
Sources: Champion wattage chart (Space heater 750–1,500 W); Silicon Valley Power appliance chart (Portable heater 1.5 kWh/h); Silicon Valley Power appliance chart (Electric blanket 0.5 (twin) / 0.75 (double/queen) / 1 (king) kWh per night); CPSC winter safety tips (2026) (plug electric space heaters directly into a wall outlet, never an extension cord or power strip; turn heaters off when sleeping).