We're paying ~$19.5k for solar panels + installation. After the tax credit, that's $13,650 in cost. We spend ~$960/yr on electricity right now. The solar ins

We're paying ~$19.5k for solar panels + installation. After the tax credit, that's $13,650 in cost. We spend ~$960/yr on electricity right now. The solar installation will cover all those needs, plus pay us $711/yr. So we're saving $1,671/yr. Pay off is thus ~8 years. The panels are good for 25 years. That's $28k in savings by the time the warranty runs out. They'll probably last longer. The batteries are a different matter. I believe net meter makes them irrelevant, so the equation stays the same for most "sane" people. For me, I want to be off-grid, so I'm happy to pay a premium for batteries. That said, SGIP makes them roughly free if we get lucky. We'll see what happens.