That does sound about right, and part of that cost relates to the redundancy needed to ensure that when 'on' it supplies what they advertise.

Then there are people like Cernovich who are pushing people to get into solar installations as a career option with high earning potential. He got pissed off when I mentioned that the only reason people save money is because of taxpayer money going in, and the manufacturers get tax money to be able to pay out that much, but that it's all just scams, and that while I have the skills to do it, my integrity would not allow me to make money like that where there's no expectation of benefit for the buyer.

Was one of the few times he responded to me, and essentially gave that argument a "that's out of context" level of counter argument.