Description The Renogy Wanderer-Li is a 30A PWM solar charge controller that integrates efficient PWM charging to increase battery life and improve system performance. Designed with a simple interface for ease of use, the controller uses multiple LED indicators to notify users of charge status and battery information. This newly improved model has two advanced features: an RS232 port and Lithium battery charging. With the addition of the RS232 port, users can now connect and communicate with the Renogy BT-1 Bluetooth module . By adding the BT-1 to the Wanderer-Li, you can now use the smartphone app, DC Home, to monitor and adjust your solar system remotely. With the inclusion of the Lithium Battery Mode, the 30A negative-ground controller is now capable of charging various 12V battery types and banks, including most 12V lithium models available on the market. Installation Notes: The default starting position of the Wanderer controller terminal hatches are closed (in the UP position) that could mistakenly look like an open wire hatch. Make sure to FIRST lower each terminal hatch by screwing the terminals counterclockwise to expose the wire terminal hatch to the open position. THEN secure each cable by rotating the screws clockwise to the closed position. Simple Install: Fully open the hatch (CCW), insert the appropriate wires, and completely close the hatch (CW). If you have any questions regarding this product, please call us at 1 (909) 287-7111 or email support@renogy.com . Key Features Optimized for a 12V system; Deep cycle Sealed, Gel, Flooded, and Lithium battery option ready. Smart 4 Stage PWM charging (Bulk, Boost, Float, and Equalization) and temperature compensation increases battery life and improves system performance. Intelligent protection against reverse polarity, overcharging, short-circuit, and reverse current. Multiple LED indicators for easy to read charge status and battery information. Integrated RS232 port allows communication with BT-1 Bluetooth module and usage of DC Home smartphone app. Package Includes Renogy Wanderer Li 30A PWM Charge Controller 1 x