Federal Investment Tax Credit:
The Investment Tax Credit (ITC) is currently a 30% federal tax credit claimed against the tax liability of residential and commercial investors in solar energy. The residential ITC can be used when homeowners purchase solar systems outright. It allows the homeowner to apply the credit to his/her personal income taxes. For the commercial ITC, the business that installs, develops and/or finances the project, claims the credit.
The Maryland Energy Administration (MEA) encourages Maryland homeowners and businesses to invest in clean energy by providing grants for solar PV and solar water heating systems among other technologies
For More Information:
The U.S. Department of Energy has created a website called DSIRE (Database of State Incentives for Renewables and Energy), which includes summaries of all federal, state, and local tax and other incentives for each state.