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HS-T07Standalone tool

Battery runtime calculator

Estimate portable-power runtime from rated watt-hours, conversion efficiency, reserve, load, and duty cycle.

HS TOOL / 07

Estimate usable battery time.

Translate watt-hours into a bounded runtime scenario with efficiency, reserve, and duty cycle exposed.

Formula and assumptions: usable Wh = rated Wh × efficiency × (1 − reserve); average load = watts × duty cycle; runtime = usable Wh ÷ average load. The tool does not verify inverter surge limits, battery chemistry, temperature derating, or medical-equipment suitability.

RESULTEnter the measurements to calculate.
Source: U.S. CPSC power-outage safety guidance ↗