... String ,Internal DC Switch ,Transformerless H6 Topology ,Bluetooth Technology ,Sound Control , Features: High field ... weight Easily accessible front wiring component5.Communication RS485 RS232 Bluetooth PV monitoring system Datasheet S1500Input Data Max. ... /MC4, H4)opt/yesAC connection: TerminalsyesLCD displayyesInterfaces: Bluetooth/RS485/RS232opt/opt/yesWarranty: 5years/10yearsyes/opt S series ...