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5. Grid (Utility) Connection
5-1. Preparation
NOTE: The overvoltage category of the AC input is III. It should be connected to the
power distribution.
NOTE2: The inverter is built in a 63A/400V breaker to protect the inverter from AC
power damage.
WARNING! It's very important for system safety and efficient operation to use
appropriate cable for grid (utility) connection. To reduce risk of injury, please use the
proper recommended cable size as below.
Suggested cable requirement for AC wire
Conductor cross-section (mm
2
)
5-2. Connecting to the AC Utility
Overview of AC Connection Socket
Step 1: Check the grid voltage and frequency with an AC voltmeter. It should be the
same to “VAC” value on the product label.
Step 2: Turn off the circuit breaker.
Step 3: Remove insulation sleeve 13 mm for five conductors.
Step 4: Thread the five cables through pressure dome
(A), clip (B), sealing nut (C) and protective element (D) in
sequence.