> Pretty sure it's all tax funded.

That's too simple of a statement. Sure, govt grants are involved in subsidies for installation and the loan interest. But that thing is then generating electricity, which is what saves them the money.

So it's not "all" tax funded. Some of it is the sun's energy, and that was the whole point.

Similarly my friend swaps electric cars every couple of years (Volt -> Bolt -> Equinox) bragging about all the discounts and subsidies he's gotten. Maybe it's still beneficial through the used car market but it doesn't feel like an effective subsidy for the government to be handing out.

Where do you live? There should still be price competition on types of inverters, aesthetics, focus on highest ROI, etc.

I live in a heavily subsidized state and quotes ranged from (after subsidies/incentives) 5-6 year ROI to 20-25 year ROI.

> Pretty sure it's all tax funded

Yes. I’m very happy my taxes are spent on things that improve the lives of everyday people rather than endless wars.

Either spend it on productive things, or have zero taxes.

It ALWAYS happens.