This product provides an efficient and cost-effective way to heat your swimming pool using the power of the sun. Our solar pool heating system utilizes the free energy from the sun to warm your pool water, allowing you to enjoy your swimming pool for longer periods of time. Our system is easy to
From Wikipedia
Solar water heating (SWH) is heating water by sunlight, using a solar thermal collector. A variety of configurations are available at varying cost to provide solutions in different climates and latitudes. SWHs are widely used for residential and some industrial applications.