(Note* if you are running AC devices, you will need to figure out the DC amperage using our AC to DC calculator). Other DC devices should be rated in amperage. This is typically found on the device you are running for light bulbs it will be in watts and you need divide by the voltage you are running in-typically 12 volts. The first Field to enter information into is labeled “Load Size”. (Note** if you are using Gel batteries in temperatures below 0 deg F but above -60 Deg F, there is no need to check the box.) (Note* if you are running AC devices, you will need to figure out the DC amperage using our DC to AC calculator). If you find a battery with at least this many rated Amp Hours Your Load will run for the desired amount of time at a safe 50% discharge level.
Load SizeĮnter in your application's load in terms of Amperage *Įnter the time, in hours, that you want your load to be poweredĬheck if Battery Temp is Over/Under 0-85 ☏ **Ĭheck if Battery is more than 6 months oldīattery Needed is rounded to nearest whole number, and is rated in AH at a 20 Hour rate. Keep in mind if you are using an power inverter you will first need to convert the AC Amps to a DC Amps before using this calculator. This calculator is designed to provide a properly sized AH (Amp Hours) rated battery without excessively discharging the battery. If you know how much power your application takes to run, and the time you would like to run it, we'll recommend a 12-volt battery. Do you have a 12v device you need to power, but don't know what 12-volt battery you need? This calculator is designed to help you find a deep cycle battery when a continuous 12-volt load is applied.