Hardware description 23
Hardware description
Chapter contents
• Unit overview (p. 23)
• Layout drawing (p. 25)
• Block diagrams (p. 26)
• Features (p. 28)
• Model identification label (p. 29)
• Type designation label (p. 30)
• Accessories (p. 31)
• Connections and interfaces (p. 31)
Unit overview
The PRO-33.0-TL transformerless string inverter converts the direct current (DC)
from the photovoltaic arrays into a three-phase alternating current (AC). This AC is
fed to the public electricity grid or to a load circuit which is connected to the public
electricity grid.
The inverter is targeted for medium and large photovoltaic (PV) systems.
The inverter is IP65 rated and you can install it outdoors.
The inverter has three variable-speed fans which operate as needed: Two external
fans on the sides of the inverter blow air to the heat sink. An internal fan prevents
heat pockets in the unit. The exhaust vent is at the top rear of the unit.
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