UPS Battery Calculator
Estimate how long your tower sites and server rooms stay online during an outage, based on load, voltage and battery capacity.
6.3 A draw • 2400 Wh stored
System Configuration
Runtime assumes an 85% efficiency factor for inverter, wiring and battery aging. Lead-Acid / AGM should not discharge below 50% to preserve lifespan.
Estimated Runtime (100% discharge)
- Safe Runtime (50% DoD)
- 6h 48m
- Current Draw
- 6.3 A
- Total Energy Storage
- 2400 Wh
Know before the power drops.
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Create free accountUPS Runtime Calculation for WISPs
Ensuring adequate battery backup for your tower sites is crucial for maintaining uptime during power outages. This calculator helps you estimate how long your equipment will stay online based on the battery bank capacity.
How it works
The formula used is: Runtime = (Battery Voltage × Battery Ah × Efficiency) / Load Watts.
We use a standard efficiency factor of 0.85 to account for inverter losses, wiring resistance, and battery aging.
50% Depth of Discharge (DoD)
Standard Lead-Acid and AGM batteries should typically not be discharged below 50% capacity to maximize their lifespan. Deep cycle (Gel/LiFePO4) batteries may allow for deeper discharge (80-100%).
