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Battery Runtime Calculator

Estimate runtime from battery capacity, load current and depth of discharge.

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Runtime is an estimate; inverter and converter losses are applied separately.

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Assumptions and limits.
  • Constant load and a simple efficiency factor; no Peukert effect.

Runtime estimate

t ≈ (Ah × DoD × efficiency) / I. High currents reduce usable capacity in real batteries.

Frequently asked questions

Why is my measured runtime shorter?
Age, temperature, Peukert losses and increasing internal resistance all reduce real runtime.
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