Verify the inputs
Measure or document each input. If a value is only an estimate, record its source and test a conservative alternative.
Electrical power/ CALCULATOR
Battery runtime from a steady load
Estimate ideal runtime from nominal energy, usable fraction, inverter efficiency and load.
FROM ESTIMATE TO ACTION
Use the result, not just the number.
Keep the calculation traceable
Save the input link or copied result together with the date, units and assumptions. A number without its inputs cannot be checked later.
Confirm the decision
Compare the estimate with the related guide, current product data and requirements that apply at your location before buying or building.
Inputs to verify
- Nominal battery capacity (kWh)
- Use the rated energy capacity of the battery bank.
- Planned usable capacity (%)
- Keep the intended reserve outside this fraction.
- Steady AC load (W)
- Average load during the runtime period.
- Conversion efficiency (%)
- Combined delivery efficiency for this estimate.