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Battery Runtime Calculator

Engineering calculator

Battery Runtime Calculator

Nominal energy, usable energy and estimated runtime.

Nominal voltage

V

Battery capacity

Ah

Usable capacity

%

System efficiency

%

Average electrical power

W

METHOD / ASSUMPTIONS

truntime = V·Ah·U·η ÷ Pavg

V: nominal voltage
Ah: rated amp-hours
U: usable capacity factor
η: estimated system efficiency
Pavg: average electrical power, W

Model boundaries

Average power must represent the route and duty cycle.
Battery age, chemistry and temperature change available energy.
BMS limits and voltage sag can end operation early.

Engineering reference

Calculators and selection guidance are provided for preliminary design reference. Actual performance and safety depend on the complete system, operating environment and validation requirements.

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