Thanks @Ultron for the kind words! Yes @Coe123 we'd be very happy to give you a free quote to compare with what you've got, just click on that link. Our quotes include a full breakdown of every single component with individual prices so there's nothing hidden. And just FYI, our standard pricing for scaffolding is £660, though of course complex roofing arrangements will cost more.I paid £6k in Feb 2019 for 14 high end 300w Italian panels and a "Solar Edge" Optimiser system that deals with a tiny shading issue in high summer, but is very very efficient. And this still in the FIT Era.
Contact Tanjent Solar , @Trevor Larkum runs it along with another great guy Jason. They did an excellent job for me. If you want a basic 4kw panels / invertor system not high end fancy i suspect they will get close to £4k now and certainly should be able to beat £3.7k for just 8 panels.
Solar & Battery Installed Together - Tanjent Energy (tanjent-energy.com)
I'm sure Trev will be along to say hi too.