@mhjlyle wrote:
Did you ever get an answer to this question for a California system? We're also adding another/second system to our home. It's not an expansion of the existing system....it's a new system. The solar installer said we couldn't get the rebate....but that they could? Bizarre. Trying to find out if we'd get the 30% Federal Solar Tax Credit on the second system. We got some kind of credit 15 years ago when we put the first system on. Thanks!
This was answered above. There is nothing in the law that limits the solar credit to a "first" installation. The law simply says
"The term “qualified solar electric property expenditure” means an expenditure for property which uses solar energy to generate electricity for use in a dwelling unit located in the United States and used as a residence by the taxpayer."
You can't get a credit twice for installing the same property (solar equipment). You can't claim the same equipment twice, and you can only claim in when it is placed in service (installed, inspected and turned on, regardless of when it was contracted or paid for). But there is nothing in the law that says you can only claim the credit once per house or once in your lifetime.
https://www.law.cornell.edu/uscode/text/26/25D
