Wh ↔ Ah calculator
Convert battery energy and capacity. All values can be edited.
Nominal stored energy
1,280 Wh
Equivalent to 1.28 kWh. Formula: volts × amp-hours = watt-hours.
These are nominal ratings. Usable energy depends on depth of discharge, temperature, ageing, discharge rate and the battery management system.
Important: Estimates are educational, not professional engineering, installation or financial advice. Always follow manufacturers' specifications and applicable UK safety and electrical requirements.