What size power station do I need for Small space heater?
Small space heater
Default appliance profile before model-specific measurements.
The small space heater is estimated at 1,500 W and 6,000 Wh per day from 4 hours of daily use at a 100% duty cycle. Applying the stated 0.88 inverter efficiency, 0.9 usable-fraction assumption, and 1.15 reserve margin produces a nominal battery target of about 8,712 Wh.
The inverter should support at least 1,500 W, matching the listed startup demand. Exact energy use and runtime remain uncertain by approximately ±10%; evidence is insufficient for a model-specific runtime estimate without measurements or manufacturer data.
- Choose capacity: Target about 8,712 Wh nominally for the stated one-day profile.
- Check power: Use an inverter rated for at least 1,500 W of demand.
- Verify actual use: A plug-in power meter or manufacturer energy label can replace the baseline estimate with appliance-specific data.
Using the default load profile, small space heater consumes about 6000 Wh/day. A conservative one-day battery target is about 8712 Wh nominal capacity, while the inverter should cover at least 1500 W of startup demand.
Assumptions behind the calculation
- Running draw: 1500 W
- Startup/surge: 1500 W
- Default use: 4 h/day
- Duty cycle: 100%
- Usage uncertainty: ±10% 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 | 0.2 h at continuous draw | 0 default-profile days |
| 500 Wh | 0.3 h at continuous draw | 0.1 default-profile days |
| 1000 Wh | 0.5 h at continuous draw | 0.1 default-profile days |
| 1500 Wh | 0.8 h at continuous draw | 0.2 default-profile days |
| 2000 Wh | 1.1 h at continuous draw | 0.3 default-profile days |
| 3000 Wh | 1.6 h at continuous draw | 0.4 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.