Grape Solar GS-100-EXP Off-Grid Solar Panel Expansion Kit, 100W Ideal for adding additional panels to your Grape Solar GS-100-KIT, GS-200-KIT, GS-300-KIT or GS-400-KIT Polycrystalline panel with anodized aluminum frames and tempered glass for outdoor use and superior performance MC4 T-branch connectors allow for a safe and simple parallel connection of PV-modules Extension cables feature double-insulated black #10 AWG PV wire, UV and moisture resistant