Have you ever left a garden hose lying in the sun and turned the water on? What happened? The water left in the hose came out hot, right? Solar heating works from the same concept.
Solar collectors (or panels) are usually placed on the roof of your home. Lines that carry the water both in and out of the pool are attached and connected to your existing pool pump. The panels collect the thermal energy from the sun, which in turn heats the water as it passes through the series of collectors. The heated water is passed back to the pool through the return lines, exchanging cool water for warmer water. During the course of the day, the water in the pool can be “turned over” or exchanged at least one time, depending on the size of your pool and pump.