Can a Power Station Run a Space Heater?
Updated 2026-10-01
Short answer: yes, most mid-size and larger power stations can run a space heater, but not for long. Heat takes a lot of energy, and a typical heater empties a 2kWh station in a little over an hour on high. If staying warm through an outage is the goal, there are much better ways to spend the same battery.
What a space heater draws
Most plug-in space heaters in the US have two settings: about 1,500W on high and about 750W on low (check the label on yours). Unlike a fridge, a resistance heater has no start-up surge, so the number to match is simply the running wattage.
- To run a heater on high, the station needs at least 1,500W of continuous output, ideally with some headroom.
- A smaller station can still run the heater on its low setting if its output is above 750W.
Some stations have a mode that lets them power heaters above their rated output by lowering the voltage. That can work for a simple resistance heater, but the heater will also put out less heat, so it doesn't change the runtime math below.
How long it will last
Runtime is roughly the battery's capacity, less about 15% for inverter losses, divided by the heater's wattage.
| Station capacity | Heater on high (1,500W) | Heater on low (750W) |
|---|---|---|
| ~1,000Wh | ~35 minutes | ~1.1 hours |
| ~2,000Wh | ~1.2 hours | ~2.3 hours |
| ~4,000Wh | ~2.3 hours | ~4.5 hours |
| ~6,000Wh | ~3.5 hours | ~7 hours |
These assume the heater runs continuously. A heater with a thermostat cycles off once the room is warm, which stretches the time, but in a cold house during an outage it will run most of the time. Use the runtime calculator to check a specific station and wattage.
Stations that can do it
For the high setting you need 1,500W or more of output. In our data that starts in the 1kWh class, with models such as the Anker SOLIX C1000 Gen 2 (2,000W) and Jackery Explorer 1000 Plus (2,000W), though at that capacity you get roughly half an hour of heat. The 2kWh class is the practical minimum for an hour or two, and the home backup class for an evening.
Better ways to stay warm on battery power
- Run your furnace instead. A gas or oil furnace burns fuel for the heat and only needs electricity for its blower and controls, typically a few hundred watts. That makes a battery last many times longer than it would with a space heater. The furnace has to be connected through a transfer switch or inlet installed by an electrician; see the home backup planner to size it.
- Heat the person, not the room. An electric blanket or heated throw usually draws around 50–150W. A 1kWh station can run one all night.
- Heat one small room. If you do use a space heater, close the door, use the low setting, and run it in bursts.
- Recharge during the day. Solar panels can put back part of what a heater uses overnight, though winter sun is short. See how many solar panels you need.
For multi-day winter outages where electric heat is the only option, a generator or a whole-home battery is the more realistic tool. See power station vs generator vs home battery.
Never use a fuel-burning heater, grill or generator indoors. Follow your space heater's instructions and keep it clear of bedding and curtains.