Energy Credits after 2016
Nonbusiness Energy Property Credit.
This credit applied to improvements such as adding insulation, energy efficient exterior windows and doors and energy-efficient heating and air conditioning systems.
It expired as of the end of 2016.
Residential Energy Efficient Property Credit.
This nonrefundable energy tax credit will help individual taxpayers pay for qualified residential alternative energy equipment, such as solar hot water heaters and solar electric systems. The credit is equal to 30 percent of the cost of qualified property.
Find details on qualification criteria at Energystar website