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Choose a calculator and replace the tested example values with your own equipment ratings.

Battery Runtime Calculator

Estimate ideal, typical, and conservative battery runtime from voltage, amp-hours, load, discharge depth, and efficiency.

Estimate the amp-hour capacity needed for a target load and runtime.

Estimate portable power station runtime while accounting for usable capacity and converter losses.

Estimate how inverter efficiency and standby draw change battery runtime.

Estimate appliance energy use and electricity cost from watts, daily use, and your utility rate.

Convert watt-hours to amp-hours at a specified nominal voltage.

Estimate daily solar production from array watts, peak sun hours, and system losses.

Estimate solar battery amp-hours from daily energy, autonomy days, voltage, discharge depth, and efficiency.