RioRand (TM) VS4024N 40A PMW pv battery charge controller with LCD Display RioRand ViewStar series solar controller is new generation controller for off-grid solar system, such as street light, solar home system or small power station etc. It has LCD display, reliable battery charging, full electronic protection, programmable parameters and other features and powerful function. Adopt graphics dot-matrix LCD screen and HMI (human-machine interface) with 4 buttons, integrated menu displaying and operation 32 bit MCU with high speed 12 bit A/D high-precision sampling to ensure accuracy Excellent EMC design High efficient Series PWM charging Use MOSFET as electronic switch Widely used, automatically recognize day/night Humanized design of browser interface, undertake every operating conveniently Full control parameters setting and modification, diversified load control mode Gel, Sealed and Flooded battery type option Adopt temperature compensation, correction algorithm for charging and discharging parameters automatically