The Grape Solar 200-Watt Off-Grid Solar Panel Kit is ideal for a variety of applications, including RVs, boats, 12-Volt battery charging, small pumps, charging small electronic devices and operating LED lights. Made with high-efficiency crystalline solar cells for years of service, this solar kit is easy to install and virtually maintenance free. An anodized aluminum frame and a sealed junction box make the panel weatherproof for outdoor use. Two blocking diodes prevent reverse current flow. You can easily add up to three additional panels for more power. This system will provide approximately 600-Watt Hours or 50 Amp Hours of charge per average day. The kit includes: 2pc Grape Solar GS-Star-100W 100-Watt polycrystalline solar panels, a 35 Amp Xantrex charge controller, and 450-Watt Xantrex modified sine inverter with two outlets, cables and manual.