PDACPA
Member
Definitely do it it soon. Some portion of that roof + Powerwalls is eligible for the 26% fed tax credit this year. Which goes to 22% in 2021, 10% in 2022(?).
But to get the credit you must be "installed" in the calendar year. Your interpretation on what "installed" means.
PS. I would add at least one additional powerwall. 2 more would be even better given the size of your system. Each powerwall add stroage, but more importanly adds 5 Kw of power you can draw at any one time. So if you want to cover A/C in addition to lights you want at least two. The cost for an additional PWs is about $6,500 per PW. And a lot of the costs of installing PWs is built into the costs of installing the first one.
I totally agree on the need for more Powerwall's. The roof cost is just so high and adding multiple Powerwalls is going to put me at a break-even point around 25-30 years. My initial thought was get one powerwall and have the electrical and everything set up so I could add more down the road and just pay cash for them.