The Renogy Wanderer is a 30A PWM charge controller. This advanced negative-ground controller is designed for off-grid solar applications and can be used with a 12V battery or battery bank. Integrating highly efficient PWM charging, the Wanderer increases battery life and improves system performance. The controller comes equipped with fully comprehensive self-diagnostics and electronic protection functions to prevent damage from installation mistakes or system faults. Negative grounding controller ensures the broader off grid applications and safety, especially to be used on a vehicle which has battery negative on the chassis. A little extra investment on the right charge controller will generate a much higher return and prevent system failure.