SolarCity came knocking in 2013 to put up panels (without battery storage) in a leaseback arrangement (no money out of pocket).
The electricity generated by the panels reverse meters my utility electricity usage. SolarCity gets the tax break and collects what I would have otherwise paid as a utility "distribution charge". My net saving come from the reverse metering rolling back the number of kWH I have to pay for to the utility company.
At the time, I calculated average $50/month savings. That calulation has changed for a couple of reasons:
1.) Trees were cut dow, so my panels get more sun than originally estimated.
2.) MA electricity prices have become obscene. So, that means my $/kwh savings could have increased to my favor.
In 2013, I was reading articles about all the coal, nuke, and natural gas plants that were being shutdown for the Global Climate Change nonsense - decreased generation supply. I was also reading about the natural gas and electricity transmission projects being blocked by NIMBY's - constrained generation supply and distribution supply.
So for me, it wasn't about "savings" so much as cost avoidance. Every dollar I save is worth $1.60 in earned income. Cost avoidance is also not taxed. So, the whole scam provided me with more disposable income (money I wasn't paying to the utility) without incurring the payroll taxes for the gross income equivalent.
Cost-avoidance allows me to increase my net disposable income without getting the tax man involved.
A $1.00 saved is $1.60 earned.