330W Solar Max Flex Slim PanelThe 110W Xantrex Solar flex kit features a flexible solar panel with 5 busbars and PERC (Passivated Emitter and Rear Contact) mono-crystalline cells, a special cell technology that increases module efficiency significantly over standard solar cells. Designed with a highly protective top-layer called ETFE (Ethylene-Tetra-Fluoro-Ethylene), this allows for better light transmittance, corrosion resistance, stain-resistance, weather resistance, and overall superior durability over a wide temperature range, compared to non-ETFE semi-flexible panels.Easily customize and extend your solar system using our expansion kits.Benefits:Up to 30 degrees of flexibilityPERC technology*5 busbar technology**ETFE Protection***2-year product warranty*Competitor panels do not currently use PERC technology**Most brands use 2-4 busbars, more busbars means better efficiency & durability***Ethylene-Tetra-Fluoro-Ethylene - extends the lifespan of the panel compared to non-ETFE panelsThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.