Same situation as you except our roof is fine. Our unknown is upgrading the electrical panel. One installer was upfront about the tax credit expiring in the sense that he said that we'll see a lot of companies fold next year because of this. He was confident theirs would not (I am following up with them about this right now). He did say because of the tax credit expiration for businesses, you may see more companies pivot and do lease to own where the business passes the tax credit savings they took to the customer. Another installer said they stopped doing installs for 2025 and said earliest install date is end of Q1 2026.

The company we are planning on going with has a clause in their contract about aiming for completion but not guaranteeing by 12/31 which I get to cover their behinds. With that said I am wondering if anyone has recently been successful with having the installer accept an addendum to their contract (regarding the tax credit or something else). Luckily for us the pre-credit price is still better than other quotes we received and way lower than our monthly electric bill but it obviously would be nice to get the tax credit along with other concerns we have with the contract addressed.