There are two main ways you can power electrical devices on the campsite. The first is to use a leisure battery, which is like a car battery and provides a 12V supply, and the second is an electric hook-up, which provides a 230V supply as you would find at home.

How many volts can a 20-amp breaker support?

120-volt 20-amp 120-volt circuit: 20 amps x 120-volts = 2,400 watts.