What is the difference between a kilowatt (kW) and a kilowatt hour ( kWh)?
A kW is a thousand watts and a unit of power. A kWh is the amount of work done, or energy used when a kW of power works for one hour. We use Watts (W), kilowatts (kW) and kilowatt peak (kWp) to measure power when sizing a system to ensure that all of the different components will work efficiently and safely together when connected. We use kilowatt hour (kWh) and kilowatt hours (kWhrs) to measure how much usable power will be generated and or available for export/sale. Conventional electricity bills are measured and payable based on kWhrs.
