How Long Will 12v Battery Last Calculator. If you intend to power the power inverters using AGM or Gel-Cell lead-acid batteries for at least 30 minutes rule of thumb is to use 12V batteries with the capacity in Amp-hours 10x lesser than the power of the inverter given in watts. Just as we added up the 120-volt shore power needs in watt-hours we will add up the needs of 12-volt battery-powered appliances in amp-hours.
If you intend to power the power inverters using AGM or Gel-Cell lead-acid batteries for at least 30 minutes rule of thumb is to use 12V batteries with the capacity in Amp-hours 10x lesser than the power of the inverter given in watts. This is because the 18 Ah rating of the battery is likely measured at the 20-hour dis. You can estimate this by calculating the average time of power cut your area gets.
Choose the amount of energy stored in the battery.
Just as we added up the 120-volt shore power needs in watt-hours we will add up the needs of 12-volt battery-powered appliances in amp-hours. When using a deep cycle battery across multiple days it is important to consider the amount of power youll need to put back into the battery to ensure continued operation. Get the Battery You Need Today. Here is the formula.
