The Grape Solar 540-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 solar cells with high module conversion efficiency and long term output reliability, this solar kit is easy to install and virtually maintenance-free. An anodized aluminum frame and a sealed junction box makes the panel weatherproof for outdoor use. Panels have blocking diodes to prevent reverse current flow. This system will provide approximately 1,620-Watt hours or 135 Amp hours of charge per average day. The kit includes: a 3-piece 180-Watt mono crystalline solar panel kit, a 40 Amp charge controller with mobile monitoring, a 1,800-Watt pure sine inverter with two outlets and a USB port, flat surface mounting brackets, cables and a manual.