Are you ready to investigate solar hot water for your home? Find an installer that serves your community.

What is Solar Hot Water?

Solar hot water, or solar thermal, systems capture energy from the sun and use it to heat your home’s hot water tank, providing up to 80% of your hot water for free!

Hot Water Tank

Solar Collectors

The Technology

How It Works

  • Solar energy heats liquid circulated through collectors on your roof or on the ground.
  • Heat from the liquid is transferred to a solar storage tank or boiler through a heat exchanger.
  • Hot water is provided to your home. When needed, a backup source of heat will provide supplemental hot water.

Why Should I Consider Solar Hot Water?

If you are looking for an affordable way to go solar, solar hot water can be an excellent investment to reduce costs.

Lower Greenhouse Gas Emissions

Reduce greenhouse gas emissions from water heating by up to 80%


Lower costs than heating water with oil, propane, or electric resistance

See MassSave’s HEAT Loan

Less Expensive Solar

Installing solar hot water is a fraction of the cost of installing solar photovoltaic (electricity) systems


Solar hot water systems can be paired with any source of back-up water heating

Things to Consider

Is solar hot water right for me?

Solar hot water provides 80% of your hot water for free, dramatically cutting your home hot water heating bill.

Solar hot water requires good sun exposure for at least 5 hours a day for optimal production.

Solar hot water will reduce rental property utility bills by making spikes in tenant hot water usage less expensive.

Solar hot water pool heating systems are an environmentally friendly and economical way to keep pool water heated to a comfortable temperature.

After incentives, solar hot water’s net cost is approximately $4,500, much lower than solar electric (PV) systems. The 0% interest Mass Save® HEAT Loan will enable you to start saving money from day one.

Your Guide to Solar Hot Water for Your Home

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We’re In This Together

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Let's work together to reduce greenhouse gas emissions from our homes and build a clean energy future for Massachusetts.