kWha

kWha is not a recognized unit in standard electrical engineering or the SI system. In practice, it appears in some product labels or informal contexts, but it is typically a typographical error or nonstandard shorthand rather than a defined measurement.

Most commonly, sources that imply a meaning for “kWha” are actually referring to kilowatt-hours (kWh), the unit of energy. Kilowatt-hours measure the amount of energy transferred or stored when a device of a given power runs for a certain period. This is distinct from kilowatts (kW), which measure instantaneous power, and from watt-hours (Wh), another valid energy unit with the same meaning as kWh but on a smaller scale.

If you encounter the term on a label or in documentation, it is advisable to verify with the manufacturer or source. When dealing with energy storage or capacity, the standard and unambiguous unit to use is typically kilowatt-hours (kWh). If precise energy content is essential, rely on kWh rather than attempting to interpret kWha.

Conversion and context: 1 kWh equals 1 kilowatt sustained for 1 hour, or 3.6 megajoules. This relationship helps distinguish energy from power and clarifies any ambiguity that may arise from nonstandard labeling.

See also: kilowatt-hour, watt-hour, kilowatt, energy unit conversions.