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What size generator or power station for a garage door opener? (700+ W)
To run a garage door opener, choose at least
700 W running · 1,100 W startup surge.
700 W running · 1,100 W startup surge.
A garage door opener draws about 550 W while running, but its motor can spike to roughly 1,100 W at startup, so size for the surge. 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 28 min |
| 500 Wh | 0 h 46 min |
| 1,000 Wh | 1 h 33 min |
| 2,000 Wh | 3 h 5 min |
| 3,000 Wh | 4 h 38 min |
Sizing guide
| Minimum running watts | 700 W |
| Minimum starting watts | 1,100 W |
| Suggested inverter | 1,100 W or higher |
See also garage door opener wattage and running cost.
FAQ
How many watts does a garage door opener use?
About 350-750 watts while moving, with a brief startup surge.
Does an opener use standby power?
A few watts to keep the radio and lights ready, which is negligible.
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