[Intelligent Charge & Maintain] Built-in intelligent MPPT charge controller chips, generates at least 10%-20% more power than traditional controller. The smart 3-stages charging algorithm is improved to better charge and maintain 12v battery, keep it topped off in all seasons. [Full Protections] Prevent battery from over charge, over voltage, discharge and short circuit, reversed polarity protection, waterproof and sparkproof, battery is fully protected. [Upgraded Z Brackets] The brackets allows to mout the solar panel easier than traditional Z brackets, durable and strong, well built for years usage, maintenance free & easy installation. [Visual Monitor] The colorful LED indicator helps to visually monitor the working status, better understand battery conditions-flash in green, output normal; flash in Red, Charging normal; solid green, battery is full; solid red, errors; indicator off, no output. [Free Maintenance] Durable aluminium frame and tempered glass, well built for years. Come with 3 piece SAE cable kits, plug and play, easy to use. No electricity cost, free maintenance for outdoor use. Backed by extended 12 months warranty and lifetime technical supports.