Solar water heating systems include solar collectors and hot water storage tanks. In most installations, an antifreeze solution is circulated through solar collectors to extract heat, which is delivered to the storage tank. A solar hot water system that can meet a household’s water needs during summer months may need to be supplemented with a conventional backup system for periods of limited sunlight or high usage.
Panels are most effective when they are installed facing south with full sun exposure. Consult a NABCEP certified solar professional listed on our vendor locator tool to find out more about what kind of system would meet your domestic hot water needs.
- Low-cost hot water – A solar hot water system can significantly reduce hot water costs because the energy to heat the water comes from the sun.
- Reduced environmental impact – A solar hot water system gets its heat from the sun, a renewable resource.
- No combustion – A solar hot water system presents no risk of fuel or combustion gas leaks.
- Requires solar exposure – Not all buildings or roofs are good candidates for solar hot water systems. The most cost effective installations are on southern-facing roofs with few obstructions or shading.
- Requires back-up – Solar water heating systems always require a backup system for cloudy days and times of increased demand.
Homeowners interested in finding out more about solar hot water systems should contact local certified installers and can click here to go to the Department of Energy’s guide to solar systems.