The Grape Solar 600-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 include bypass diodes. The system has a theoretical capability of collecting 2.4 KWH, or 200 AH (for a 12-Volt battery) of energy in merely 4-hours under direct sunlight. The kit includes: 3 x GS-STAR-200-Watt solar panels, a 40 Amp Grape Solar Comet PWM charge controller, a XANTREX PROWATT 2000-Watt DC TO AC PURE SINE WAVE INVERTER, cables and manual. 12-Volt deep cycle battery not included.