1)solar controller used PWM technology 2)12V,24V,48V,96V 3)10A, ... ,30A,60A,100A 4)Short circuit prtection 5)lower price solar controller specification:1) MCU control charge and discharge by the state ... over-charged, low voltage and high voltage, unloading protectionsAlarm signalTurbine/solar cell/over load/fail systeminterfaceRS232/IPCooling typeAuto cooling & fanWorkingContinuous and ...