![]() ![]() Generally in home standard, only single 12V battery is used.īackup Time = ( 60 x 12 x 1 x 0.8 / 150 ) hoursįurther Reading: How Much Power Does My Laptop Really Use? Note: The inverter capacity is not used in backup time calculation. The battery backup time in hours can be calculated using following formula:īackup Time = Battery AH x 12V x N x Efficiency of Battery / Load in Wattsīattery AH = Ampere Hour Capacity of BatteryĮfficiency of Battery = Generally it is 0.8, which is the max. The performance of the inverter depends on the connected battery and vice-versa. Similarly, battery is an integral part of the inverter. So, you should prefer inverter of 250VA or more. ![]() If you want to run 200W of appliances then, Volts x Ampere x Power Factor = kW (Watts) The capacity of the inverter should be chosen based on how much watt of appliances you power at a time. Here is a quick guide on calculating inverter and battery backup time. ![]()
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