The Feed in Tariff (FIT) scheme gives guaranteed payments to households that produce their own electricity using renewable technologies like solar panels and wind turbines.
The Cost savings are:
Generation Tariff which pays on the amount of electricity generated.
Export Tariff which pays on the amount of electricity exported back to the national grid because you have not used it this is usually deemed as 50% of electricity generated.
Savings on your electricity bills because you are generating a portion of your household electricity.
The Tariff is payable for up to 20 years and tax free paid each quarter, payments are index linked.