Energy fundamentals
Why Inverter Efficiency Changes Runtime
See how conversion loss and inverter standby draw reduce AC runtime.
The essential idea
An inverter changes battery DC into AC and releases some input energy as heat. Efficiency varies with model and load.
How to apply it
Standby power matters most at small loads because it remains an additional draw. Use a manufacturer efficiency curve or measurement when available.
A practical decision
Runtime estimates should include both conversion efficiency and idle consumption instead of applying a single unexplained reduction.
Use this in a calculator
Browse all home energy calculators and replace the examples with measured or manufacturer-provided values.
Last reviewed: August 6, 2026