specifically recommends against kWh "to avoid possible confusion".
* In 2014, the United States official fuel-economy window sticker for electric vehicles used the abbreviation kW-hrs.
* Variations in capitalization are sometimes encountered: KWh, KWH, kwh, etc., which are inconsistent with the International System of Units.
* The notation kW/h for the kilowatt-hour is incorrect, as it denotes kilowatt per hour.

The hour is a unit of time listed among the non-SI units accepted