... quality CharacteristicsMaximum Power Point Tracking :( MPPT) 99%Easy-setting with LCD display panelVarious ways of communication interface.Optional parallel operation mode ... ), AFI (VDE0126-1-1), AFI (VDE0126-1-1)System SpecificationDisplay: LCD, LCD, LCDStandard communications interface: RS485, RS485, RS485Optional communications interface: GPRS/Ethernet ...