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PSU-12 Delivery Scope Instruction Manual POWER SUPPLY UNIT FOR THE ON-GRID SUPPLY OF THE PHOTOVOLTAIC WATER HEATER (PSU-12,PSU-18) IMPORTANT! Please read these operating instructions carefully before installing and commissioning the power supply unit! Specifications Unit  PSU-12  PSU-18  Input voltage range VAC 100–240 100–240 Input frequency … Read more