This intelligent,multi-purpose solar charge and discharge controller has a very friendly interface of fixed LCD display. Various control parameters can be flexibly set, fully meet your various application requirements. Feature: 10A 20A 30A 50A 60A solar charge controller Microcontroller digital accurancy, all bult in LCD display. Simple button operation PWM 3 stage charging controller Multistage charging technology Automatic load reconnection Load disconnection depending on LVD Temperature Compensation, Night light function Common positive grounding on one terminal Has overcharge protection, Deep discharge protection, Short circuit protection, Open cricuit protection, Overload protection, reverse current protection at night.