I see such your use as appropriate, however even that is massively subsidized. To date all such solar investments get massive tax payer subsidies. I could be wrong but I would guess your 10 year return would have gone past and useful time, for return of investment, if the government subsidies were not available.
Know several people who went your route and ALL of them stated unequivocally, “if not for the government subsidy it would have been unfeasible.” These are people in the Nuclear Power field just like myself.
Using tax dollars to prop up a failing business model is just another thing killing this country.
So, in other words, the solar system I bought would have been just as affordable without the tax credit as it was with the tax credit.