How To Determine Amp Hours On A Battery. Ah WH V. This means that is supplies 268 amps in the duration of 5 hours without dropping off.
This is the chart I came up with after I studied the charging time data provided by Schumacher a battery charger manufacturer. So this one battery will provide 12 x 100 1200 Watt hours. The key is to use the watts you know to calculate the amps at the battery voltage.
With your multi-meter measure the voltage across the batterys two terminals.
For example if you have an appliance that draws 20A and you use it for 20 minutes then the amp hours used would be. Or 12 kWh kilowatt hours of energy. The C rating tells you how many amp hours the battery can provide for a very specific period of time. Battery Run Time Formula.
