Size uninterruptible power supply batteries for critical solar system loads including inverter and BMS power.
Input Parameters
Results
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Energy Required
Wh
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Battery Capacity
Ah
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Battery Size
kWh
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Discharge Current
A
Note: UPS batteries should be sized with 80% aging factor for end-of-life capacity. Replace batteries when capacity drops below 80% of original.
Reference
Energy (Wh) = Load x Minutes / (60 x UPS Eff)
Design Wh = Energy / Aging Factor (0.8)
Battery Ah = Design Wh / Battery Voltage
Discharge Current = Load / (Voltage x Efficiency)