A pump, usually your existing pool pump, pushes water through a filter to strain leaves and debris. Water is then pumped into a Heliocol solar panel mounted on your roof, porch, fence, or other location with good sun exposure (optimally south facing in North America). The water is substantially heated as it moves through the panel, and it flows back into your pool, warming the water. Unlike solar water heaters for indoor use, solar pool heaters do not require a storage tank. Your pool provides all the storage needed.
To learn more about solar pool heating, explore our blog.