355W RV Solar Kit Expansion Pack Expand your RV Solar Kit with a Longi 355 Watt Solar Panel, cable joiner, and Z Bracket Mounting Kits. Contact us directly for a shipping quotation. 1 x Longi 355 Watt Solar Panel Black framed 1 x MC4 RV cable joiner pair (two into one Y adapters) 1 x Z bracket Mounting Kit(4 x Z brackets)