What is the Difference Between a Kilowatt and a Kilowatt Hour?

The difference between a kilowatt (kW) and kilowatt-hour (kWh) is the most misunderstood topic while trying to understanding electricity and how we measure power and consumption/production. Both concepts are referenced when talking about a photovoltaic solar system and important to understand before buying a solar PV system. A kW measure power, it represents the actual [...]