Adventurer Li 30A PWM Flush Mount Charge Controller w/ LCDDescription Meet the Renogy Adventurer Li, newly improved with two advanced features. Thanks to its programmable Lithium charging voltage, the 30A PWM solar charge controller is now capable of charging most Lithium batteries available on the market. The second addition to the controller is the RS232 port, used to connect and communicate with the Renogy BT 1 Bluetooth module. By adding the BT 1 to the Adventurer Li, you can now use the smartphone app,