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Power · Calculator
Estimate battery runtime from watt-hours, load, efficiency, and a user-selected reserve.
Working calculator
Enter the known values. ShowSide validates them before running the calculation.
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Result
Enter battery energy, connected watts, efficiency, and reserve.
Transparent math
Confirm UPS VA/watt ratings, manufacturer runtime curves, battery condition, ventilation, transfer behavior, grounding, and required shutdown time. Do not open or service energized battery systems unless qualified.