SunHeater® S120U DIY Solar Pool Heater Kit, One 2′ x 20′ Panel

The SunHeater® S120U is an easy-to-install DIY solar pool heater designed to help pool owners extend their swimming season using free energy from the sun. This complete solar heating kit connects to your existing pool pump and filtration system, allowing you to warm pool water naturally without increasing utility bills. The durable 2' x 20' solar collector captures solar energy and transfers that heat directly into your pool, helping raise water temperatures by up to 6–10°F under ideal conditions.

Perfect for above-ground pools and many inground* pool applications, the SunHeater S120U can be mounted on the ground, a rack, fence, or rooftop, making it one of the most versatile DIY solar pool heater solutions available. Its patented tube-web-tube design maximizes heat transfer while providing years of reliable performance.

Whether you're looking to reduce heating costs, swim earlier in the spring, or keep your pool warmer in the fall, the SunHeater S120U offers an affordable, environmentally friendly alternative to gas and electric pool heaters.

* IMPORTANT: For rooftop installations or inground pool applications, SunHeater should be connected to your pool equipment with rigid 1-1/2" Sch. 40 PVC piping, not cuffed pool hose. The S120U kit includes adapters for connecting to cuffed hose; in order to adapt to PVC, two 1-1/2" MPT x Slip adapters (not included) will be required.

Contact our technical support team if you are unsure which SunHeater kit is best for you.