Back SG-15-17-20-RT Three-Phase Inverter Sungrow Datasheet e Manuals DATASHEET_SUNGROW_SG15_17_20RT_EN.pdf QUICK_INSTALLATION_GUIDE_SUNGROW_SG3.0-20RT_EN_IT.pdf USER_MANUAL_SUNGROW_SG3.0-20RT_EN.pdf Warranties and Deductions WARRANTY_SUNGROW_EN.pdf