Understanding Solar Rebates & Credits
Federal Tax Credit
The Federal Tax Credit, currently at 30% is available to all California residents who purchase their photovoltaic solar system, with no upper limit. This applies to all existing and new construction homes. (Homeowner must have a federal tax liability to take advantage of the solar investment tax credit.)
The Federal Tax Credit is a one-time credit, but may be carried forward (and possibly back). The IRS current federal tax form for the investment credits is Form 3468.
There is currently no state solar rebate program. The California Solar Initiate (CSI) reached its 10th and final tier in April 2013, exhausting all its funds.