I have twelve 2 volt batteries set up in a configuration to make 12 volts. This charger "seems" (the key word is seems) to be charging all of them equally. It maxes out at 25 amps and I'm not sure if I need more considering the high amp output of my twelve batteries. I'm sill not 100% sure if this is the right charger for my application, however if it isn't, I won't regret purchasing it because of the great price and the so many other applications it offers.