How long will a power station run a space heater?
A 1,000 Wh power station runs a typical space heater for about 1.1 hours. It averages about 750 W, draws 1,500 W while running.
Space heaters are the hardest load for a battery: 1,500 W on high, around 750 W on average as the thermostat cycles.
How long by battery size?
| Battery | Runs a space heater for |
|---|---|
| 300 Wh | about 20 minutes |
| 600 Wh | about 41 minutes |
| 1,000 Wh | about 1.1 hours |
| 2,000 Wh | about 2.3 hours |
| 3,600 Wh | about 4.1 hours |
Hours = battery Wh × 0.85 (inverter losses) ÷ 750 W average draw.
How long on each model?
| Power station | Battery | Runtime |
|---|---|---|
| EcoFlow River 3 Plus | 286 Wh | can’t start it |
| Jackery Explorer 300 v2 | 288 Wh | can’t start it |
| Jackery Explorer 600 v2 | 640 Wh | can’t start it |
| EcoFlow River 2 Pro | 768 Wh | can’t start it |
| Anker SOLIX C800 Plus | 768 Wh | can’t start it |
| EcoFlow DELTA 3 Classic | 1,024 Wh | about 1.2 hours |
| Anker SOLIX C1000 | 1,056 Wh | about 1.2 hours |
| Jackery Explorer 1000 v2 | 1,070 Wh | about 1.2 hours |
| Bluetti AC180 | 1,152 Wh | about 1.3 hours |
| ALLPOWERS R1500 | 1,152 Wh | about 1.3 hours |
| EcoFlow DELTA 2 Max | 2,048 Wh | about 2.3 hours |
| Jackery HomePower 2000 Plus v2 | 2,048 Wh | about 2.3 hours |
| EcoFlow DELTA Pro | 3,600 Wh | about 4.1 hours |
| Anker SOLIX F3800 | 3,840 Wh | about 4.4 hours |
| EcoFlow DELTA Pro 3 | 4,096 Wh | about 4.6 hours |
Would a generator be better?
The smallest generator in our comparison that can start a space heater on its own is the Honda EU2200i (1,800 W running, 2,200 W starting). A generator suits long outages and heavy loads; a power station is silent and safe indoors. Size a generator for this.
Running more than just this? Add everything you need and get the exact size, with matched models.
Size my setupMore questions
How long will a 500 Wh power station run a space heater?
About 34 minutes, at an average draw of 750 W.
How long will a 2,000 Wh power station run a space heater?
About 2.3 hours.
What size power station do I need to run a space heater for 24 hours?
About 23,294 Wh with our 10% margin; none of the models in our comparison covers a full day, so a generator is the realistic route.
How many watts does a space heater use?
About 1,500 W while running, about 750 W on average over time.
What is the smallest power station that can start a space heater?
In our comparison, the EcoFlow DELTA 3 Classic: 1,800 W output.
Can solar keep a space heater running?
Partly: our planning figure of 700 Wh of solar on a good day covers about 48 minutes of a space heater.
Would a generator be better for a space heater?
Often yes: a day of it needs more than about 4,200 Wh, where a generator is the cheaper route. The smallest one in our comparison that starts it is the Honda EU2200i (1,800 W running). Never run a generator indoors.
