Optimize your solar setup and extend battery life with the Renogy Wanderer-Li 30A PWM solar charge controller. This device is engineered to enhance your system's performance through efficient PWM charging, all while providing a simple, user-friendly interface. Multiple LED indicators keep you informed of charge status and battery health at a glance. This upgraded model includes advanced features like an RS232 port, allowing you to connect the Renogy BT-1 Bluetooth module (sold separately) for remote system monitoring and adjustments right from your smartphone via the DC Home app. Now equipped with a lithium battery charging mode, the Wanderer-Li is a versatile powerhouse, capable of safely charging a wide variety of 12V batteries, including most 12V lithium models on the market.