Standby Power Battery Sizing Constant Power Discharge Calculation Example

Constant Power Discharge Tables

Because the YHP19 gives greater than requirement it is possible to reduce the number of cells as follows -  Try 186 cells: Minimum Cell Voltage: 306 / 186 = 1.645 volts Watts per Cell Required: 355.6 x 1000 / 186 = 1912 Watts From the data sheets for Constant Power discharges to 1.65 volts for 15 minutes YHP19 gives 1944 watts for 15 minutes to 1.65 volts 186 YHP19 cells therefore meet the duty. Similarly - Try 180 cells: Minimum Cell Voltage: 306 / 180 = 1.70 volts Watts per Cell Required: 355.6 x 1000 / 180 = 1976 Watts From the data sheets for Constant Power discharges to 1.70 volts for 15 minutes YHP19 gives 1773 watts for 15 minutes to 1.70 volts 180 YHP19 cells therefore do not meet the duty!