Eligibility for energy efficient credits
This credit allows you a 30 percent reduction in tax liability for whatever you spent buying and installing environmentally-friendly equipment in your home. To qualify, you have to install the new equipment before the end of 2017.
Qualifying equipment includes solar-powered units that generate electricity and hot water in the home, energy-producing wind fans and geothermal heat pumps. The credit is only available for improvements you make to your primary home. If you are adding solar panels to your summer house, you won’t get a tax break for it.