Solar pool heaters are a game-changer for pool owners looking to extend their swimming season without high costs or environmental impact. By using the sun’s free energy, these systems maintain comfortable water temperatures, even in cooler months, allowing you to enjoy your pool for weeks or months longer than with unheated pools or costly traditional heaters. In many climates, pool use is limited to warm months, but solar heaters can extend this period significantly. They work by circulating pool water through solar panels, where it’s warmed by sunlight before returning to the pool. This process keeps water at a pleasant 75–85°F, even as air temperatures drop, making swimming enjoyable well into spring or fall. In sunny regions, year-round swimming is often possible. Unlike gas heaters, which burn $500–$1,500 in fuel annually, or electric heat pumps , which cost $300–$700, solar heaters have no operating costs. Their initial cost of $3,000–$7,000 is offset by these savin...