The bottom of the webpage linked to by the QR code has this: "The Green Home Scheme is a third-party marketing company that acts on behalf of its partners".
What does the small print at the bottom of the page say?
There doesn't appear to be a company of that name registered at Companies House. Starting to look dodgy!!
There have been other folk searching for "green homes scheme scam" One of the search results was:
The statement that it will not affect your FIT payments might not be true either and I'm pretty sure you're not going to gain any 10p per kwh. My FIT agreement lists all the components with their serial numbers. I'd love to change out my 250w panels for 400's but 1) it would push my array over 6kw generating and 2) I'd have to change both of the inverters which are liste don the agreement.