What is battery Amphere-hour? How the battery back up time
period is calculated?
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Answer Posted / shivaleela
Ampere Hour=(Watts/DC Voltage)*(1/Inv.Efficiency)*
(1/Batt.Efficiency)*No.of Hours
Ex:W=500W V=12V Inv eff.=0.9 Batt.eff=0.7 Time=1hour
Then Ah=(500/12)*(1/0.9)*(1/0.7)*1
=66.13
It means for 1 hour backup we can use 65Ah Battery for
500W/12V Inverter.
Similarly,for 2 hours Ah=65*2=130Ah
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