the government feed in tariff pays you 43.3 pence for every kilowatt that you consume
and 46.4 pence for every kilowatt that you export back to the national grid
the payments are guaranteed for 25 years
the payments are tax free
the feed in tariff is index linked to keep up with inflation
It is quiet, clean and reduces electricity bills. (especially as electricity prices increase).
PV technology is mature, robust and reliable. It has no moving parts.