Networking and infrastructure
UPS runtime estimator
Estimate battery runtime from nominal battery energy, efficiency and load.
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How it works
Uses nominal watt-hours × efficiency ÷ load. Real runtime varies with battery condition, discharge rate, temperature and inverter behavior; treat this as a rough estimate.
Example
A 12 V, 9 Ah battery at 80% efficiency and 100 W load estimates about 0.86 hours.