The Grape Solar 100-Watt Off-Grid Solar Panel Expansion Kit is perfect for adding to existing Grape Solar Off-Grid Kits. Whether you need more power for your existing items, or want to run more items off of solar power, the Expansion Kit is the way to go! Made with high-efficiency crystalline solar cells, this solar kit makes it easy to add panels to your system and is virtually maintenance free. An anodized aluminum frame and a sealed junction box make the panel weatherproof for outdoor use. A two-diode bypass minimizes power drop caused by shade. This system will add approximately 300-watt/ hours or 25 amp/ hours of charge per day to your existing 12V system. This kit includes: 1x Grape Solar GS-Star-100W polycrystalline solar module, a 10-amp inline MC4 panel fuse, a pair of MC4 T-Branch Connectors, a pair of 16-inch MC4 extension cables, and an installation manual.