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What size generator or power station for a pressure washer? (1,900+ W)
To run a pressure washer, choose at least
1,900 W running · 2,400 W startup surge.
1,900 W running · 2,400 W startup surge.
A pressure washer draws about 1,500 W while running, but its motor can spike to roughly 2,400 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 10 min |
| 500 Wh | 0 h 17 min |
| 1,000 Wh | 0 h 34 min |
| 2,000 Wh | 1 h 8 min |
| 3,000 Wh | 1 h 42 min |
Sizing guide
| Minimum running watts | 1,900 W |
| Minimum starting watts | 2,400 W |
| Suggested inverter | 2,400 W or higher |
See also pressure washer wattage and running cost.
FAQ
How many watts does a pressure washer use?
Electric models use about 1200-2100 running watts plus a startup surge.
What generator runs a pressure washer?
Allow for the surge - a 2500+ watt generator suits most electric washers.
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