THERMAL HOT WATER

Using a well designed solar hot water system will have a dramatic effect on your home’s carbon footprint, and could help provide significant savings on your energy cost.

HOW THERMAL HOT WATER WORKS

A solar hot water heating system uses the radiant energy from the sun to heat water for use in one’s home. If you’re not familiar with this technology, you’ve likely seen it before on a roof and mistaken it for a solar photovoltaic (PV) system. Solar thermal, also known as solar hot water, similarly collects solar energy using roof-mounted panels or tubes, but rather than converting that energy into electricity as with solar PV systems, solar thermal systems store the energy in water, heating it. That heated water is then fed into the home and used for hot water in faucets, showers, and appliances. A well designed system typically displaces around 70% of energy used in heating hot water throughout the year.

FEATURES & BENEFITS

Generates warm water for your home using the sun’s thermal energy.
Can supplement your regular water heater.
Has the potential to eliminate your entire water heating bill.

Works well in cold climates– meeting the heating demands even on the coldest day.

Incentives for Thermal Hot Water

Mass Save HEAT Loan

If you’re installing a solar thermal hot water system, you may be eligible for a 0% interest HEAT Loan from Mass Save. You can finance up to $25,000 over the course of 7 years for home energy efficiency upgrades. Although fuel prices fluctuate, for most projects the energy savings will help cover the monthly loan payments. Find out more about Mass Save’s HEAT Loan program.

Alternative Energy Credits

Solar hot water system installations in Massachusetts qualify for the Alternative Energy Certificate (AEC) program. With this program, non-emitting renewable technologies generate certificates based on their energy production. These certificates are sellable to utility companies looking to meet state-mandated renewable energy goals. The revenue earned from these certificates will help you to further save on your solar hot water or air source heat pump installation. Learn more about AECs.

SOLAR THERMAL WORKS IN WINTER

Just like solar electric panels, your solar thermal panels will work during the wintertime. They will generate less hot water than in sunnier months, so you may have to use your backup water heater more often during cold weather. Any snow that is accumulated on the panels will typically slide off on its own when the sun comes back out. Solar thermal systems installed will also have freeze protection.

LITERATURE RESOURCES

Your Guide to Solar Thermal Hot Water

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