RATECONNECTOR
UPS Battery Backup Calculator
Input Parameters
Load Power (Watts)
500 W
Supply Voltage (V)
110 V
120 V
220 V
230 V
240 V
UPS Efficiency (%)
90%
Battery Voltage (V)
6 V
12 V
24 V
48 V
Battery Capacity (Ah)
50 Ah
100 Ah
150 Ah
200 Ah
250 Ah
300 Ah
500 Ah
Depth of Discharge (%)
80%
Desired Backup Time (hours)
Batteries in Series
Batteries in Parallel
Calculate
Auto-Size
Reset
Calculation Notes
Backup time is estimated based on inverter efficiency and usable battery capacity (DoD)
Auto-size computes parallel strings needed for desired backup time
Always include 10-20% safety margin for practical applications
Consider temperature effects on battery performance
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