100W Solar Expansion KitThe Xantrex Solar 100W Expansion kit features solar panels 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.The Xantrex Solar 100W Expansion kit includes a 30A charge controller and system hardware that is designed for a fast & easy installation, including PV cables & battery cables with a built-in fuse and ring terminals, built-in ferrule terminations for quick connections to the charge controller and mounting brackets. Easily customize and extend your solar system using our expansion kits.Features:100W Output15% smaller and lighter*Best in class 18% module efficiency*PERC Technology**5 year product warranty5 busbar technology****Xantrex 100W rigid panel specs and performance compared with 100W models of other popular brands**competitor panels do not currently use PERC technology***Most brands use 2-4 busbars, more busbars means better efficiency & durabilitySpecifications:Expansion Kits - Includes solar panels, mounting hardware and a pair of male and female branch connectors to connect solar panels in parallel.