The Feed In Tariff was brought in by the Government to help increase the level of renewable energy in the UK.
Feed-In Tariffs (also known as FITs) are part of the Clean Energy Cashback Scheme, which pays people for creating their own "green electricity".
There is also a Renewable Heat Incentive Scheme, for heating.
What are the main benefits?
A large portion of the energy your solar panels produce will be exported back to the grid.
In standby mode 90% of the electricity you generate could be exported.
It is assumed that you export 50% of what you generate and this is what you are paid for by your energy supplier at around 5 pence per unit regardless of how much energy is actually exported.
Your energy supplier will then sell it back to you at a much higher rate (typically 12 pence per unit) when you require more energy than you are generating.
It makes sense therefore to harness this energy, prevent it from going back to the grid and use it yourself.
Battery storage enables you store your excess generation for you to use later when your consumption is higher than your generation.