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What size generator or power station for an electric furnace? (12,500+ W)
To run an electric furnace, choose at least
12,500 W running.
12,500 W running.
An electric furnace draws about 10,000 W while running. Pick a generator, inverter or power station rated comfortably above these numbers.
Battery runtime calculator
Estimated runtime—
Assumes about 85% usable capacity. Motors need extra headroom for startup surge.
How long a power station lasts
| Power station | Estimated runtime |
|---|---|
| 300 Wh | 0 h 2 min |
| 500 Wh | 0 h 3 min |
| 1,000 Wh | 0 h 5 min |
| 2,000 Wh | 0 h 10 min |
| 3,000 Wh | 0 h 15 min |
Sizing guide
| Minimum running watts | 12,500 W |
| Minimum starting watts | 12,500 W |
| Suggested inverter | 12,500 W or higher |
See also electric furnace wattage and running cost.
FAQ
How many watts does an electric furnace use?
Whole-home electric furnaces commonly draw 5,000-20,000 watts while heating.
Is an electric furnace cheap to run?
No - a heat pump delivers far more heat per watt and usually costs much less.
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