For taxable years beginning on or after January 1, 2001, and before January 1, 2006, the California Personal Income Tax Law and the Corporation Tax Law allow a nonrefundable tax credit for certain approved solar or wind energy systems. The tax credit, known as the Solar or Wind Energy System Credit, can be used by taxpayers against their net tax in an amount equal to the lesser of 7.5 percent of the cost paid for the purchase and installation of a solar or wind energy system after deducting the value of any municipal, state, or federal sponsored financial incentives, or $4.50 per rated watt of the solar or wind energy system. For taxable years beginning on or after January 1, 2004, and before January 1, 2006, the credit percentage changed to 7.5 percent. The California Franchise Tax Board ("FTB") is charged with administering the tax credit in consultation with the California Energy Commission("Commission"). To qualify for the tax credit, solar and wind energy systems must satisfy a number of requirements as specified in the law. In addition, the law requires solar and wind energy systems to be certified by the Commission.
The Commission certifies eligible systems for this tax credit using a simple "self-certification" process. This process utilizes the Solar or Wind Energy System Credit Worksheet and lists of approved equipment, which taxpayers can use to determine on their own whether their systems are certified and eligible for a tax credit. The worksheet and equipment lists were developed in conjunction with the Franchise Tax Board and are intended to be used with the official tax form FTB 3508, titled "Solar or Wind Energy System Credit."
Further information is provided in FTB Form 3508, the Solar or Wind Energy System Credit Worksheet, which lists approved system components for the Solar or Wind Energy System Credit as well as sample calculations. Each of these documents may be located by clicking on the relevant link below:
For further information regarding FTB Form 3508 or other tax-related questions, please call the Franchise Tax Board at 800-852-5711. For questions regarding the worksheet or system certification, please call the Commission at 800-555-7794 (toll free in California).
California Franchise Tax Board |
California Energy Commission |
Commission Worksheet and Example
- Solar
or Wind Energy System Credit Worksheet
(PDF file, 4 pages, 80 kilobytes) - Worksheet
Example
(PDF file, 2 pages, 76 kilobytes) - Solar
or Wind Energy System Credit Fact Sheet
(PDF file, 2 pages, 416 kilobytes)
Forms/Information for 2005 Tax Year Only
- Franchise Tax Board (FTB) Form 3508 for 2005 Taxes (PDF file on FTB website)
- List of Approved System Components for the 2005 Tax Year
- 2005 List of
Approved Photovoltaic Modules for the Solar or Wind Energy System
Credit
(PDF file, 28 pages, 122 kilobytes) - 2005 List of
Approved Wind Turbines for the Solar or Wind Energy System
Credit
(PDF file, 1 page, 52 kilobytes) - 2005 List of
Approved Inverters for the Solar or Wind Energy System Credit
(PDF file, 3 pages, 68 kilobytes)
Forms/Information for 2004 Tax Year Only
- Franchise Tax Board (FTB) Form 3508 for 2004 Taxes (PDF file on FTB website)
- List of Approved System Components for the 2004 Tax Year
- 2004 List of
Approved Photovoltaic Modules for the Solar or Wind Energy System
Credit
(PDF file, 28 pages, 122 kilobytes) - 2004 List of
Approved Wind Turbines for the Solar or Wind Energy System
Credit
(PDF file, 1 page, 52 kilobytes) - 2004 List of
Approved Inverters for the Solar or Wind Energy System Credit
(PDF file, 3 pages, 68 kilobytes)
Forms/Information for 2003 Tax Year Only
- Franchise Tax Board (FTB) Form 3508 for 2003 Taxes (PDF file on FTB website)
- List of Approved System Components for the 2003 Tax Year
- 2003 List of
Approved Photovoltaic Modules for the Solar or Wind Energy System
Credit
(PDF file, 12 pages, 77 kilobytes) - 2003 List of
Approved Wind Turbines for the Solar or Wind Energy System Credit
(PDF file, 1 page, 46 kilobytes) - 2003 List of
Approved Inverters for the Solar or Wind Energy System Credit
(PDF file, 3 pages, 56 kilobytes)
Forms/Information for 2002 Tax Year Only
- Franchise Tax Board (FTB) Form 3508 for 2002 Taxes (PDF file on FTB website)
- List of Approved System Components for the 2002 Tax Year
- 2002 List of
Approved Photovoltaic Modules for the Solar or Wind Energy System
Credit
(PDF file, 12 pages, 77 kilobytes) - 2002 List of
Approved Wind Turbines for the Solar or Wind Energy System Credit
(PDF file, 1 page, 46 kilobytes) - 2002 List of
Approved Inverters for the Solar or Wind Energy System Credit
(PDF file, 3 pages, 56 kilobytes)
Forms/Information for 2001 Tax Year Only
- Franchise Tax Board (FTB) Form 3508, 2001 (PDF file on FTB website)
- List of Approved System Components for the 2001 Tax Year
- 2001 List
of Approved Photovoltaic Modules for the Solar Energy System Credit
(Adobe Acrobat PDF file, 8 pages, 23 kilobytes) - 2001
List of Approved Wind Turbines for the Solar Energy System Credit
(Adobe Acrobat PDF file, 1 page, 5 kilobytes) - 2001
List of Approved Inverters for the Solar Energy System Credit
(Adobe Acrobat PDF file, 4 pages, 16 kilobytes)



