Solar pool heaters provide a useful advantage over other types of heating solutions, in that they don’t require any fuel. Once you’ve bought and installed the unit, all of the energy used to heat your pool is free! This can make a solar pool heater by far the cheapest option for heating a pool.
The downside, of course, is its dependence on the time of day and on seasonal weather patterns. For this reason, if your pool sees frequent use, it’s often best to pair a solar pool heater with a gas heater. That way, when the sun’s not out, you won’t have to dive into an ice-cold pool. This method can give you the best of both worlds, being cheaper than running a gas or electric heater alone while still offering the same dependability.