The using time depends on the capacity of
the battery. According to the formula: working voltage = battery voltage *
battery capacity *0.8*0.9/rated power of loads
For example: a 12V60AH battery works with a
220V 100W device
Working
time=12V*60AH*0.8*0.9/100=5.184(hours)
Note: 0.8 is the discharge rate of battery
(constant), 0.9 is the inverter efficiency (constant). The real using time is
also effected by the newness of your battery
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