Watt: Watt is the unit used to measure electric power. It represents one joule of energy transferred per second.
Kilowatt-hour (kWh): Kilowatt-hour is a unit of energy commonly used to measure electricity consumption over time. It represents the amount of energy consumed when using one kilowatt for one hour.
Efficiency: Efficiency measures how effectively electrical energy is converted into useful work or output in a system, often expressed as a percentage.