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Solar PoolSolar pool heating systems provide free heat by circulating pool water through a solar collector, often on a nearby roof.

Certain solar pool heating systems installed in your Oregon home may be eligible for a Residential Energy Tax Credit.

RETC Qualifications

A solar pool, spa, or hot tub heating system must meet certain qualifications to earn a Residential Energy Tax Credit​ up to $2,500, depending on the system installed and its first-year energy yield. See the RETC Rate Chart for more information.

Qualified solar pool heating systems must:

  • Be new and come with a 10-year warranty or better.
  • Be certified by the Solar Rating and Certification Corporation , Florida Solar Energy Center , or other body approved by the Oregon Department of Energy.
  • Have a minimum Total Solar Resource Fraction (TSRF) of 75%. TSRF is the fraction of usable solar energy that your system should collect, based on shading and the tilt and orientation of the collector.

Qualified solar spa or hot tub heating systems must:

  • Have a design approved by the Oregon Department of Energy.
  • Have controls to maintain safe temperatures.
  • Have a minimum Total Solar Resource Fraction (TSRF) of 75%.
While not required, we recommend that you have an Oregon Department of Energy certified solar tax credit technician verify your system's performance. 

RETC Program Sunset

The RETC program ended on December 31, 2017. 

To qualify for a 2017 tax credit:
  • RETC devices must have been purchased by December 31, 2017;
  • Devices must be operational by April 1, 2018; and
  • ODOE must receive your application no later than June 1, 2018.
Solar photovoltaic​ applications must be initially input into PowerClerk​ by a tax credit technician on or before December 31, 2017.​​

If you plan to transfer your tax credit, ODOE must receive the pass-through application on or before June 1, 2018. Please review the RETC Administrative Rules for more information about program eligibility and requirements.​


Ask your installing technician to complete the technical sections in the RETC application. Your technician should also complete the Solar Site Assessment worksheet, which is attached to the application.

Complete the rest of the application, listing any other incentives you are receiving. Send it to the Oregon Department of Energy with a copy of your receipt listing the date, model, and price you paid for the system (minus labor and permits).​

(instructions and application)

Other federal, local, or utility programs may also offer incentives .


2016/17 RETC Application for Solar Pool Heating
2017 RETC Rate Chart ​​​​​​​​​​​​​
2016 RETC Rate Chart ​​​​​​​​​

​​​​​​​​​​​​​​​​​​​​​​ Oregon Climate Zone Map ​​​​​​
​​​​​​​​​​​​​​​​​​​​​​​ Become an Approved Solar Technician​​​​

​​​​​​​​​​ RETC Administrative Rules​​​​​​

​​​​​​​​​​​ Incentives Ending in 2017 ​​​​​
​Contact the RETC Team: