How long will a power station last?
It depends on what you plug in. These are runtimes for one appliance at a time, worked out from Energy Star's figures and the makers' manuals. Pick an appliance to see every model we compare, or use the calculator for a whole list.
| Running just this | 300Wh | 1,000Wh | 2,000Wh |
|---|---|---|---|
| Refrigerator | 2.5 to 5 hours | 8 to 17 hours | 16 to 35 hours |
| Freezer (chest or upright) | 3 to 7 hours | 9.5 to 23 hours | 19 to 46 hours |
| CPAP (blower only: humidifier and heated tube off) | 7.5 to 16 hours | 26 to 55 hours | 2 to 4 days |
| Gas furnace blower (1/3 to 1/2 HP) | about 0.5 hours | about 1.5 hours | 2.5 to 3.5 hours |
| Modem and Wi-Fi router | 8 to 11 hours | 27 to 38 hours | 2 to 3 days |
| TV (32 to 65-inch LED) | 1.5 to 5.5 hours | 5.5 to 19 hours | 11 to 38 hours |
| Home oxygen concentrator | 0.5 to 1 hour | about 2.5 hours | 4.5 to 5.5 hours |
| Window air conditioner (10,000 BTU) | 0 to 0.5 hours | 0.5 to 1 hour | 1.5 to 2.5 hours |
| Sump pump (1/2 HP) | about 0 hours | about 1 hour | about 1.5 hours |
Capacity × 90% usable × 85% inverter efficiency ÷ (the appliance's average draw + about 10W the station uses itself). A small station may not start a refrigerator's compressor at all: each appliance's page checks every model's surge rating.
Size one for your whole list
Tick what you'd keep running and for how long, and see which power stations cover it.
Open the calculator →Bigger loads like a well pump or central air? See what size generator you need.