Question: how many watts do i need to charge my rv battery?
Answer: So, for example, a current of 1 amp at a potential of 12 volts is 12 watts. A current of 8.33 amps at a potential of 12 volts is 100 watts. So remember the 100 watt standard solar panel? When it's feeding your 12 volt RV battery, it's producing a current of 8.33 amps.