Feed-in Tariffs (FiTs) are one of the government strategies for
providing financial support for RE generation in UK [58]. The aim
of FiTs is to provide a simple system to incentivize small domestic
and business renewables. FiTs are the most effective policy to
encourage the rapid and sustained development of RE [59,60]. The
scheme pays a tariff, which varies according to the technology and
the size of the installation, for every kWh generated and the
quality of resource. It also pays a small additional tariff for the
lifetime of the scheme, which is linked to the retail price index
[61]. Further details about the functions of FiT systems and the
evaluation criteria of different design options are described in
Refs. [58,62].