Tax Credits for Solar Water Heaters A federal tax credit makes energy-efficient solar water heaters a more affordable and sustainable option for many homeowners. Read Tax Credits for Replacing Heating and Cooling Systems Upgrading to an energy-efficient heating and cooling system can save hundreds on your utility bills and earn you a tax credit worth as much as $1,500. Read Tax Credits for Replacing Your Roof Replacing your roof with a qualifying energy-efficient metal or asphalt roof can cut your cooling bill and earn you a $1,500 tax credit. Read Tax Credits for Adding or Replacing Insulation A federal tax (1 comments)