Connecting The Battery Bms-Ac Terminal; Connecting Communication Cables; Battery Communication Connection - Growatt WIT 50K-A User Manual

Procedure for connecting the main battery power:
1. Connect the ground cable to the battery power ground bar, as shown in Fig 6.6;
2. Strip 18-20 mm of the insulation layer of the DC cables;
3. Crimp the battery cables and the battery terminals using crimping pliers, and then
tighten the insulation sleeve;
4. Connect the battery cables to the battery terminals on the inverter, as shown in Fig 6.6;
5. After connecting the main battery power cables, bind power cables at the reserved
position, as shown in Fig 6.6.
Route the cable
1
2 Strip the cable
19±1mm
3 Crimp the cable
4
Tighten the terminal
Fig 6.6 Position of the battery terminals
NOTE:
1. Connect the ground cable before connecting the battery cable; the ground point is
shown in Fig 6.6.
2. Bind the battery power cables at the designated place after connecting them to the WIT
Inverter.
3. Lock the right cover plate after connecting the cables.

6.4.2 Connecting the Battery BMS-AC Terminal

NOTE: Perform operations according to on-site requirements.
Procedure for connecting the battery BMS-AC terminal:
1. Open the cover plate on the right side of the inverter, the position of which is shown in
Fig 6.6;
2. Find the corresponding terminal from the accessory kit. Refer to Table 6.3 to connect
the terminal;
3. Remove the dustproof cover from the BMS-AC terminal, insert the terminal that has
been crimped with the cables to the BMS-AC terminal, and tighten it.
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5 Connect to the terminal
6
Tighten the clamp
1 Route the cable
2 Strip the cable
11±1mm
3 Secure the cable
A B
A B
A-A B-B
4
Tighten the terminal
Fig 6.7 BMS-AC termina
Table 6.3 Definitions of BMS-AC terminal
BMS-AC terminal port definition
Number Definition of signal
1 L
2 N
3 PE
NOTE:
1. Do not touch or remove the dustproof cover if the BMS-AC terminal is idle.
2. Reinstall the battery protective plate and the right cover plate after the cable
connection is completed.
6.5 Connecting Communications Cables

6.5.1 Battery Communication Connection

The BMS-COM terminal of the WIT 50-100K Inverter is a 16-pin connector. The matching
male terminal are delivered with the package.
1. Connect the communication cables to the corresponding terminals as required. For
details, see Table 6.4;
2. Remove the dustproof cover from the BMS-COM terminal, insert the 16-pin terminal
(the client side) to the corresponding position, and ensure that it is tightly connected;
5 Connect to the terminal
Note
Supply power to the BMS
Grounding
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