Metric Republic / Building Physics & Energy / Battery Backup Runtime Calculator

Battery Backup Runtime Calculator

Estimate usable stored energy and backup runtime from battery capacity, depth of discharge, efficiency and load.

How it works

Estimate usable stored energy and backup runtime from battery capacity, depth of discharge, efficiency and load.

Formula:
Usable energy = capacity × DoD × efficiency; runtime = usable energy / load.

Before you use the result: Do not use simplified thermal or moisture estimates as a substitute for a complete building-physics assessment.

Practical use

Use verified material data and project geometry. Treat results as planning estimates and compare them with the energy/thermal requirements that apply to the project.

Keep units consistent with the source information.
Use project-specific densities, pack sizes and coverage rates where provided.
Round purchasing quantities to supplier packaging and delivery rules.

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