ITEM NAME:15A PWM Solar Panel Battery Regulator Charge Controller 12V 24V Auto Switch J9H6 15A PWM Solar Panel Battery Regulator Charge Controller 12V 24V Auto Switch J9H6 PWM solar charge controller PWM10-60: Compared with normal solar charge controller, this PWM controller could increase efficiency by 10%-30%. This controller can charge and discharge at the same time. This PWM controller has perfect SOC function, control charge current, and supply power to the loads. Always keep the battery on fill voltage.Prevent the battery from reverse charging to solar panels during nights. Reverse Polarity Protection for Solar Panels.