I have heard they are all shocking... From drilling multiple times through cladding and flashing to find the shortest way instead of using the existing roof space as told by the owner. That was experience from my concreter but no first hand experience from me.
I looked into prices for a co-worker, he got quoted $80k for a 30kw system for his farm (mangoes and castle / walk in fridges etc.). He would get a $20k rebate. Installation cost in the quote was$3k. I could get all the parts for $55k and he would set everything up and get an electrical contractor to make the connections. The problem is you only get the rebate if you have the signature from a certified solar installer which means he would pay the same whether he installs it himself or gets it installed. The only one making profit 20k plus margin on the parts because i think they get better prices than i do are the solar companies.
My 2c...
