Backup Power Battery Size Calculator
Use this for UPS, portable power station and battery-backup planning before checking surge and device-specific limits.
Backup battery size
Use this for UPS, portable power station and battery-backup planning before checking surge and device-specific limits.
This is a planning/compatibility calculation from the values you enter. DeviceOK does not claim to read charger protocols, battery health, cable electronics or mount certification from your browser.
Privacy: All values stay in your browser.
What this test tells you
This test checks
- Average load
- Target backup duration
- Entered delivery efficiency
How to read the result
Startup surge and inverter output limits must be checked separately.
Nominal Wh and usable delivered energy are not the same.