How does it work?

Solar panels produce a direct current of electricity (DC), this then needs to go to an inverter which changes the current to usable power, alternating current (AC). The inverter then sends the power to the household appliances which provides electricity to them (think dishwasher, washing machine, fridges etc.) and any excess power goes back to the grid, which you get a small credit – anywhere between 5 & 12c per kW exported.