The Grape Solar 400W Off-Grid Solar Panel Kit is ideal for a variety of applications, including RVs, boats, 12V 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. This system will provide approximately 1,200W Hours or 100 amp Hours of charge per average day. The kit includes: 4pc Grape Solar GS-Star-100W 100W polycrystalline solar panels, a 35 amp Xantrex PWM charge controller, 1,800W Xantrex inverter with two outlets and 1 USB port, cables and manual.