I was griping before about having to have some certified person install systems to get a tax break. Here is something I just ran across in my travels of dsireusa.org:
Solar, Wind & Biomass Energy Systems Exemption
Here are the requirements:
ELIGIBILITY REQUIREMENTS
Ownership Requirements: None.
Property Location Requirements: None.
Property Use Requirements: Property must contain a solar or wind energy system, an arrangement of solar or wind energy equipment designed to provide h....

Do It Yourself Solar