The Feed-in Tariff (FiT) pays a high rate for each kWh being generated from renewable energy. The rates vary between sizes of installation and between technologies.

Plug Into The Sun's scheme works by allowing investors to purchase a solar PV installation on a roof in Cornwall. The investor then gets the FiT payment, and the roof owner gets free electricity, plus 3p/kWh for any electricity that is exported to the grid.