Firstly, let me assure you that installing a PV system is not a gamble. The industry is very well regulated and the technology is well proven to be a good investment as roof tops up and down the country now show.
The MCS is a mandatory accreditation that both technology manufacturers and installers have to adhere to to operate in the UK. This shows consumers that they have a minimum competency and standards in terms of manufacture and installation process.
IWA is a deposit protection and guarantee insurance.
REAL is a voluntary consumer code run by the Renewable Energy Association. Any installer worth their salt will be a member, and it makes sure that consumers are dealt with in a responsible manner throughout the sales and installation process.
I wouldn’t give the time of day to any solar company without this accreditation.
Welcome to the solar panelled century.