This controller uses the most advanced MPPT technology to ensure high efficiency (>95%) of your solar system. Significantly outperforms standard PWM controllers. Comprehensive set of electronic protection functions e.g. stops reverse current at night (from the battery back to the solar panel), automatic cut off to prevent over-charging and deep discharge, solar panel over voltage, over load, short circuit and reverse polarity protection. Inbuilt backlit LCD screen displays key charging parameters. Multiple connectivity options for the controller (remote meter, mobile app, PC software - see below) enable the user to personalise each charging stage, set charging parameters for Lithium batteries, create a user-defined battery type with specific parameters and access exclusive settings Suitable for solar panels up to 390W (12V battery or battery bank) or 780W (24V system). Current limiting function (30A) allows possibility of adding more solar panels in the future. Scroll down to Product Description for more information about this product