Most of the companies still MCS registered are the bigger national outfits that employ subbies. As demand is so high, they are using lots of new subbies who don't fully understand PV.
When the FiT system was designed, the government did try to prevent that sort of thing, with codes of conduct, standards etc etc, but like anything where there's money to be made, the charlatans got around it. Lots of companies were formed and quickly dissolved again to avoid any longer term comeback on them. It all looks wonderful with so many logos on your company headed paper - think I had at least 6. The original intention was that PV would become regular work, the FiT scheme was designed to end over the course of about 10 years having encouraged people like myself to train and invest in this line of work. The scheme finished after 6 years having met some target. In my opinion MCS should have been dismantled at the same time, but as a private company quango, they have kept themselves in a job and are trying to get control of other tech like EV charging. The cost of MCS registration is around £3k, so lots of small companies like myself left the industry, which just left the big players in the market, the ones that BS a lot and use subbies. This is why I'm quite happy to encourage people to install their own systems. I do still install a system of two for friends, and do repairs - not many companies will take on a repair.
