What size power station do I need for Chest freezer?
Chest freezer
Default appliance profile before model-specific measurements.
Using the supplied baseline estimate, the chest freezer uses about 840 Wh per day: 100 W running power, 24 hours per day, and a 35% duty cycle. A conservative one-day target is about 1,220 Wh of nominal battery capacity, including the stated 88% inverter efficiency, 90% usable fraction, and 15% reserve margin.
The inverter should support at least 500 W of startup demand. Exact consumption and runtime for a specific freezer are uncertain by approximately ±25%; evidence is insufficient for a model-specific estimate without the freezer’s energy label or measurements from a plug-in power meter.
- Battery sizing: Target about 1,220 Wh nominal capacity for the default one-day profile.
- Inverter sizing: Allow at least 500 W for the freezer’s stated startup or surge demand.
- Decision check: Include other simultaneous household loads when sizing a complete backup setup, since this evidence covers the chest freezer only.
Using the default load profile, chest freezer consumes about 840 Wh/day. A conservative one-day battery target is about 1219 Wh nominal capacity, while the inverter should cover at least 500 W of startup demand.
Assumptions behind the calculation
- Running draw: 100 W
- Startup/surge: 500 W
- Default use: 24 h/day
- Duty cycle: 35%
- Usage uncertainty: ±25% 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 | 2.4 h at continuous draw | 0.3 default-profile days |
| 500 Wh | 4 h at continuous draw | 0.5 default-profile days |
| 1000 Wh | 7.9 h at continuous draw | 0.9 default-profile days |
| 1500 Wh | 11.9 h at continuous draw | 1.4 default-profile days |
| 2000 Wh | 15.8 h at continuous draw | 1.9 default-profile days |
| 3000 Wh | 23.8 h at continuous draw | 2.8 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.