Maximum Heat Output With Space Saving Footprint! Free CLEAN ENERGY From The Sun - Increases Pool Temperatures Up To 5 Degrees in 4 Days! HIGH TECH DESIGN! Unique, Contoured Clear Cover Creates "Greenhouse" Effect To Maximize Solar Collection. ADAPTERS FOR INTEX POOLS INCLUDED! EFFICIENT SOLAR GATHERING! Sturdy Legs Keep Panel At An Angle To Maximize Sun Exposure And Effectiveness SOLAR GRID SYSTEM WITH BYPASS REQUIRED FOR IN-GROUND POOLS AND PUMPS 1.5 HP OR GREATER. The most innovative passive solar product design delivering maximum pool heating performance is the Solar Grid Solar Panel. Extend your swimming season by using the energy from the sun. Solar Grid Solar Panel features sturdy legs to keep panel at an angle and maximize sun exposure. Clear cover creates greenhouse effect for improved pool heating. Unique, contoured surface design maximizes solar collecting area. Easy as 1, 2, 3 with the Solar Grid Panel! 1. Sun warms water running through panel. 2. Water runs from pool through filter. 3. Sun-warmed water is returned to pool. Solar Grid Panels are: Effective at increasing pool temperature up to 5 degrees in 4 days. A Great Value with unbeatable price performance ratio. A great tool for making your swim season last longer. Easy to install with simple DIY hookup. Very Compatible, works with most above ground and in-ground pools. Compact No large unsightly flat mats. Easily Expandable, just connect multiple heaters to increase efficiency and warmth. Easy to drain and store. An EcoFriendly pool heating choice. Adaptors for Intex pools included. Please Note: Operation requires filter/pump (not included). Bypass Kit (Item #8420, sold separately) is required for connecting Pool Heater(s) to pumps 1.5 HP or greater or in-ground pools.