kWh measures the amount of renewable electricity generated by a solar panel system over a year.
Wind turbine systems with a higher kWh output generate more renewable electricity.
Families use up to 9,000 kWh to power lights, electronics and appliances over a year.
Electricity generated by a wind turbine system can be used immediately or stored in batteries.
An alternative to storing electricity is to feed excess electricity into the grid.
There are two main types of wind turbine; horizontal axis and vertical axis.