Understanding the distinction between kW and kWh is crucial in grasping solar energy systems. A kilowatt (kW) represents power, indicating electricity's capacity for work, used to measure both consumption and production. Solar installations are typically measured in kW, reflecting their power output potential. Conversely, a kilowatt-hour (kWh) denotes energy, representing the amount of electrical power consumed or generated over time. Solar systems are rated in kWh, reflecting their energy production capacity. Both kW and kWh are integral in planning solar installations, aiding in determining system size based on energy consumption, available space for panels, and potential energy production.