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What size power station do you need?
Pick a device below to see how long it will run. The math: capacity times 0.9, divided by your device's watts plus about 10W of inverter overhead.
Runtime calculator
Estimate. Assumes 90% usable energy plus about 10W that the power station's own inverter burns while its AC outlets are on. Check the label on your own device for real wattage.
Common device wattages
| Device | Typical draw | Notes |
|---|---|---|
| Phone charging | 10 to 20W | About 12 to 20Wh per full charge |
| WiFi router + modem | 10 to 20W | |
| Laptop | 45 to 90W | |
| CPAP | 10 to 25W average | Heated humidifier and hose raise it to 50 to 90W |
| Full-size fridge | 100 to 200W running | Cycles on and off. Plan on 1 to 1.5 kWh per day |
| Microwave | 1,000 to 1,500W | Needs a 1,500W+ inverter |
| Space heater | 1,500W | Drains 1 kWh in about 35 minutes. Not practical |
Rules of thumb
- Devices only (phones, laptops, lights): 300Wh. See the Anker SOLIX C300.
- One-night outage with a fridge: 1,000Wh or more. See the Anker SOLIX C1000 Gen 2.
- Multi-day outages: add solar panels or look at 2,000Wh+ units. A battery alone cannot do it.