XtremepowerUS Panels are built from extremely high-grade materials that are proven to last in all types of weather Pools pump and filter system circulates pool water through the SOLAR PANELS when it is heated & then returned to your pool. Once installed, these panels are cost effective, produce no greenhouse gases, and need low to no maintenance. Extend your swimming this year at a low cost with the help from the sun! System is designed to be used on above-ground or in-ground pools. Each kit is made of - 2' x 20'ft panels. Each panel is made of lightweight, flexible, durable black polypropylene. The panel tube construction creates a larger surface area which optimizes heat transfer from the sun to your pool Quantity of these solar panels needed is dependent on the pool size and the location, which may estimate by some websites. Diverter kit may be required for pumps 1.5hp and greater. Sold separately under item number B01FNE41HA