Hi,

Can anyone pls help me to calculate the battery sizing. I have gone through various websites and have found different formulae and not able to decide which formula is effective. pls suggest a effective formula for battery sizing and also how to decide the system voltage.

The following are the formulae i have come across and i would appreciate it if anyone can verify them

Thank you,

Regards

Seshadri.A.V

Can anyone pls help me to calculate the battery sizing. I have gone through various websites and have found different formulae and not able to decide which formula is effective. pls suggest a effective formula for battery sizing and also how to decide the system voltage.

The following are the formulae i have come across and i would appreciate it if anyone can verify them

**Total KWhr load = Total No. of Load*Wattage of each unit*total No. of working hours**

**Solar PV Module Capacity = (Total KWhr Load)/4**Considering insolation to be 4 hours**Inverter Capacity = Solar PV Module Capacity****Effective Load = (Total KWhr Load)/(Inverter Efficiency)****Ampere hours per day = (Effective Load)/(System Voltage)**

Total Battery Bank Capacity = ((Total Module Capacity)*(No. of backup hours))/((System Voltage)*(Inverter Efficiency)*(Battery deep discharge))Total Battery Bank Capacity = ((Total Module Capacity)*(No. of backup hours))/((System Voltage)*(Inverter Efficiency)*(Battery deep discharge))

Thank you,

Regards

Seshadri.A.V

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