Look, rooftop solar is a good thing. I'm not arguing with your facts, I'm arguing with your approach. The topic is irrelevant.
However, if it helps, let me put this out there. I'm cognizant of the fact that while my electrical bill is by use, the fairly obvious reality is that a connection to the utility and the maintenance of the utility has a very high fixed cost, which doesn't go away even if my net use is zero.
A cost-based scheme might be to bill every house $100/month for connection to the grid, and then substantially drop the price we pay (and are paid) for solar, but that hits the poor too heavily. Also, I think we can make a case that we *want* more solar than is optimal in an strictly economic sense.
In other words, there are arguments pro and con, and dismissing either pro or con means that society is denied the facts that it needs to make choices.
The dismissal of any recognition that rooftop solar, like almost *every single choice on the planet* has tradeoffs raised hackles. That any attempt to discuss such trade-offs was characterized as deceitful made them rise even further.
So, I apologize for the ad hominem nature of my post. But I stick with my basic claim: assuming bad faith on the part of your opponents harms society in general, and that unfairness towards any, individual or in the aggregate, is also harmful.
History is simply too full of examples of what can happen when people feel the rightness of their cause obviates their need for fairness.