What can a 1000Wh power station run?
A 1,000 Wh power station can keep small devices going for a day or more, but heating appliances drain it in under an hour. The table uses 87% inverter efficiency, which leaves about 870 Wh of usable AC energy. Your real results will vary with your exact devices, the battery’s age and the temperature.
| Device | Typical watts | Average draw | Estimated runtime |
|---|---|---|---|
| LED light | 10 W | 10 W | about 87 hours |
| Phone charging | 15 W | 15 W | about 58 hours |
| Wi-Fi router + modem | 20 W | 20 W | about 43 hours |
| Fan | 40 W | 40 W | about 22 hours |
| CPAP (no heated humidifier) | 40 W | 40 W | about 22 hours |
| TV (32 in.) | 50 W | 50 W | about 17 hours |
| Laptop | 60 W | 60 W | about 14 hours |
| Electric blanket | 100 W | 60 W (cycles) | about 14 hours |
| Mini fridge | 60 W | 24 W (on ~40% of the time) | about 36 hours |
| Full-size fridge | 150 W | 52 W (on ~35% of the time) | about 16 hours |
| Coffee maker | 900 W | 900 W | about 58 minutes |
| Microwave | 1,000 W | 1,000 W | about 52 minutes |
| Space heater | 1,500 W | 1,500 W | about 35 minutes, if your inverter can handle it |
Why the fridge numbers look different
A fridge compressor cycles on and off, so its average draw is much lower than the watts on the label. It also needs a short burst of extra power to start, often two to four times its running watts. A power station with a small inverter can trip on that spike even when the average load is fine.
Watch your inverter limit
Most 1,000 Wh units have an inverter of around 1,000 W. Your devices’ watts add up, and if the total goes over the limit, the unit shuts off. A space heater alone can exceed it. Check the exact output rating in your unit’s specs.
How to use this table
Add up the average draws of everything you’ll run at the same time, then divide 870 by that total for hours. Or enter your devices in the calculator and it does the math, including startup surge warnings.