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The development and hosting of this web site was made possible by a U.S. Department of Energy Million Solar Roofs Initiative Grant, #DE-FG51-00R021160

HELCO's Residential Efficient Water Heating (REWH) Program

There has never been a better time to buy a solar water heater. If you are a year-round Hawaii resident and have an electric resistance water heater, or are building a new home, you can save money and help to conserve valuable natural resources. HELCO's REWH Program helps take the guesswork out of buying a solar water heating system.

  • HELCO provides $1000 towards the purchase of your qualified system.
  • You may qualify for a 35% Hawaii State Energy Tax Credit.
  • You can save up to 90% on your water heating costs - about $6 to $12 per person per month with solar.
  • HELCO has a list of Participating Contractors and Authorized Marketing Representative that have agreed to comply with rigorous standards regarding equipment use and installation.
  • A post-installation inspection will be performed by HELCO to ensure your system was installed to HELCO's stringent standards.

Safety Notice!

In using hot water producted by any kind of heating system, especially a solar system, basic safety precautions should be followed. HELCO recommends that you always turn on the cold water faucet first, and then slowly add hot water until the desired temperature is reached.

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