Device battery runtime calculator
Runtime is energy divided by average power; peak power matters only if it changes the average or trips protection.
Wh
W
%
Estimated runtime
5.00hours
- Estimated runtime
- 300 minutes
- Usable energy
- 500.00 Wh
Show the working
- Battery energy = 500
- Average load = 100
- Usable battery energy = 100
- Usable energy = 500*100/100 = 500
- Estimated runtime = 500/100 = 5
- Estimated runtime = 5*60 = 300
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- runtime = usable watt-hours / average watts
Battery-management cutoffs, inverter idle draw and changing loads can shorten real runtime.