Growatt WIT 50-100K-US - Page 30

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● Each WIT Inverter must be equipped with an AC circuit breaker. Multiple WIT
Inverters cannot connect to the same AC circuit breaker (not applicable to off-grid
mode).
● Please do not connect loads between the WIT Inverter and the circuit breaker.
● If the cable is thick, do not shake the cable terminals after tightening them.
Otherwise, the loose connection may cause overheating that will damage the device.
Ensure that the terminals are properly connected before starting the WIT Inverter.
● After connecting the cables, apply the fireproof mud evenly on the waterproof
silica gel pad inside the AC junction box to prevent water from entering into the
box.
Preparation:
1> Ensure the grid voltage and the grid frequency are within the acceptable range;
2> Disconnect the DC switches and the breakers on the AC side and the battery side.
The circuit breaker on the AC side:
A circuit breaker needs to be installed on the AC side, ensuring a safe disconnection between the
WIT Inverter and the upstream input when an exception occurs.
1. Recommended circuit breaker specifications for WIT 50-100K-A-US and WIT
50-100K-H-US models
Device type
Rated voltage of the circuit breaker
Rated current of the circuit breaker
WIT 50K-A/-H-US
480V
150A
WIT 63K-A/-H-US
480V
150A
WIT 75K-A/-H-US
480V
200A
WIT 100K-A/-H-US
480V
200A
2. Recommended circuit breaker specifications for WIT 50-100K-AE-US, WIT
50-100K-AU-US, WIT 50-100K-HE-US and WIT 50-100K-HU-US models
Device type
Rated voltage of the
circuit breaker
Rated current of the circuit
breaker on the load side
Rated current of the circuit
breaker on the grid side
WIT 50K
-AE/-AU/-HE/-HU-US
400V
300A
150A
WIT 63K
-AE/-AU/-HE/-HU-US
400V
300A
150A
WIT 75K
-AE/-AU/-HE/-HU-US
400V
400A
200A
WIT 100K
-AE/-AU/-HE/-HU-US
400V
400A
200A
Recommended power cable specifications:
1. Recommended AC power cable specifications for WIT 50-100K-A-US and WIT
50-100K-H-US models.