Standby Power Battery Sizing
Constant Current Discharge Calculation Example
Constant Current Discharge Tables Previous Page Back to Menu
DUTY: 200 Amps for 2 hours
Nominal voltage: 48 volts
Minimum battery discharge voltage: 44.4 volts
Maximum battery float voltage: 54 volts
Temperature: 25° Centigrade
Maximum number of cells:
Maximum Battery Float Voltage / 2.25 volts (nominal cell float voltage)
54 volts / 2.25volts = 24 cells

Minimum cell discharge voltage:

Minimum Battery Discharge Voltage/Maximum Number of Cells
44.4 volts / 24 cells = 1.85 volts
From the data sheets for Constant Current discharges to 1.85 volts
YHP13
YHP15
FHP15  
8RCT800
gives 199 Amps for 2 Hours to 1.85 Volts
gives 232 Amps for 2 Hours to 1.85 Volts
gives 245 Amps for 2 hours to 1.85 Volts
gives 216 Amps for 2 hours to 1.85 Volts