Forget the Technical

The most basic analogy I always use to explain electricity is comparing it to water. Voltage can be compared to pressure. Amperage can be compared to flow. When you multiply amperage and voltage, or flow and pressure, you get energy, in the case of electricity, watts. Also similar to water, increasing the amperage, flow, you need to increase the diameter of wire, or in the case of water, the diameter of pipe. You can run huge voltages and pressures through thin wire or hose respectively but only can run so much current or flow. If we double the voltage/pressure, we can half the current/flow and get the same amount of energy resulting in half the wire diameter. This is one of the most basic principal of electricity.

Amps*Volts=Watts

AmpHours*Volts=Watt Hours

1000 Watt Hours (1kwh) will power a 1000 watt load for one hour.