Energy Efficiency FormulaThe energy efficiency formula is based on energy output and input.energy efficiency = (energy output / energy input) × 100Energy output is the useful energy offered by an item such as the light generated by a light bulb.
Example 1A solar module produces up to 320 watts of power from 1500 watts of sunlight. energy efficiency = (320/1500) × 100 = 21.3%
Example 2An electric car consumes 20 kWh of power on a drive and transfers 10.5 kWh of power to the wheels.energy efficiency = (10.5/20) × 100 = 52.5%
Example 3A gasoline burning car consumes fuel with an equivalent of 60 kWh of energy on a drive and transfers 11 kWh of power to the wheels.energy efficiency = (11/60) × 100 = 18.3%
Similar MeasurementsThe energy efficiency formula is a technical measurement that isn't always useful in comparing real world efficiencies. A large number of alternative measurements are commonly used. For example, energy per passenger mile is a common way to calculate efficiency for transportation.
|Overview: Energy Efficiency Formula|
A method of calculating the efficiency of energy production and consumption.