What size power station do I need for Window air conditioner?
Window air conditioner
Default appliance profile before model-specific measurements.
Using the supplied default profile, the window air conditioner is estimated to use about 4,680 Wh per day: 900 W running draw, 8 hours per day, and a 65% duty cycle. Because usage uncertainty is ±30%, actual consumption may vary by model, ambient conditions and settings; a plug-in power meter or manufacturer energy label is preferable when available.
A conservative one-day target is about 6,795 Wh of nominal battery capacity, incorporating 88% inverter efficiency, 90% usable capacity and a 15% reserve margin. The inverter should support at least 1,800 W for startup demand. No model-specific runtime or measured performance is available from the supplied evidence.
- Battery size: Target approximately 6,795 Wh nominal capacity for this one-day profile.
- Inverter requirement: Allow for at least 1,800 W of startup demand, not just the 900 W running estimate.
- Before buying: Confirm the air conditioner’s actual energy use and startup behavior; the supplied baseline is only an estimate with ±30% uncertainty.
Using the default load profile, window air conditioner consumes about 4680 Wh/day. A conservative one-day battery target is about 6795 Wh nominal capacity, while the inverter should cover at least 1800 W of startup demand.
Assumptions behind the calculation
- Running draw: 900 W
- Startup/surge: 1800 W
- Default use: 8 h/day
- Duty cycle: 65%
- Usage uncertainty: ±30% before model-specific measurements
Actual energy use varies by appliance model, ambient conditions, settings and load. A plug-in power meter or manufacturer energy label is preferable when available.
Runtime by battery size
| Station capacity | Continuous-draw runtime | Default usage profile |
|---|---|---|
| 300 Wh | 0.3 h at continuous draw | 0.1 default-profile days |
| 500 Wh | 0.4 h at continuous draw | 0.1 default-profile days |
| 1000 Wh | 0.9 h at continuous draw | 0.2 default-profile days |
| 1500 Wh | 1.3 h at continuous draw | 0.3 default-profile days |
| 2000 Wh | 1.8 h at continuous draw | 0.3 default-profile days |
| 3000 Wh | 2.6 h at continuous draw | 0.5 default-profile days |
Use your actual household loads
The calculator combines this appliance with refrigerators, networking, pumps, medical equipment and other essentials so simultaneous wattage and motor startup are not ignored.