Compare inverter input and output power to find efficiency and losses.
Peak efficiency is quoted on datasheets but weighted efficiency across the load range matters more, because inverters spend most time well below full output. Two percentage points of inverter efficiency compounds into hundreds of kWh a year on a typical domestic array.
Inverter Efficiency
Efficiency = output power ÷ input power × 100
Efficiency = output power ÷ input power × 100 Peak efficiency is quoted on datasheets but weighted efficiency across the load range matters more, because inverters spend most time well below full output.
Two percentage points of inverter efficiency compounds into hundreds of kWh a year on a typical domestic array.
This calculator takes 4 inputs: Output power, Input power, Operating hours per day, Energy value per kWh. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.