Looking for a reliable solar charge controller for your RV? Look no further than the BougeRV 40 Amp Solar Charge Controller! Designed with a negative ground and advanced MPPT control algorithm, this controller can quickly track the maximum power point of your PV array. Compared to a PWM charging method, the MPPT control can increase the ratio of energy utilization in the solar system by 10%-30%.Whether you're using sealed, gel, flooded, or lithium batteries, the BougeRV 40 Amp Solar Charge Controller is the smart choice for efficient and weather-resistant charging.