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What size generator or power station for a phone charger? (50+ W)
To run a phone charger, choose at least
50 W running.
50 W running.
A phone charger draws about 5 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 | 51 h 0 min |
| 500 Wh | 85 h 0 min |
| 1,000 Wh | 170 h 0 min |
| 2,000 Wh | 340 h 0 min |
| 3,000 Wh | 510 h 0 min |
Sizing guide
| Minimum running watts | 50 W |
| Minimum starting watts | 50 W |
| Suggested inverter | 100 W or higher |
See also phone charger wattage and running cost.
FAQ
How many watts does a phone charger use?
About 2-20 watts while charging, depending on fast-charge support.
Does leaving a charger plugged in waste power?
Modern chargers draw almost nothing with no phone attached.
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