VS1024N Controller for Off-Grid Solar System -Adopt graphics dot-matrix LCD screen and HMI (human-machine interface) with 4 buttons, integrated menu displaying and operation -Electronic protection: Overheating, over charging, over discharging, overload, and short circuit. -Full control parameters setting and modification, diversified load control mode -High efficient Series PWM charging with temperature compensation -Use MOSFET as electronic switch, without any mechanical switch