Quick Installation Guide for Parallel System

1.1 System Diagram

This section outlines the system connections. Only cables marked with capital letters are detailed in this manual. Other cable connections are not described.

• A: EPS connection between Inverter and parallel box (refer to Part 2).
• B: Grid connection between Grid Distribution Box and parallel box (refer to Part 2).
• C: EPS Load connection between EPS load and parallel box (refer to Part 2).
• D: Earth connection between parallel box and external earth bar (refer to Part 2).
• E: Earth connection between parallel box and EPS Load (refer to Part 2).
• F: Communication connection between parallel box and Master Inverter (refer to Part 2).
• G: Communication connection between Inverters (refer to Part 3).
• H: Communication connection between Master Inverter and SOLAX meter (refer to Part 3).

1.2 Packing List

The following components are included:

• Expansion bolt * 4, Gasket * 4
• Cold-pressed terminal (22-6) * 3, (22-8) * 5
• Cold-pressed terminal (5-5) * 28
• RJ 45 terminals * 1
• Communication terminal (green) * 1 (choose a suitable one when installing)
• Board marking paper * 1
• 4AWG European terminals (25-18) * 5
• M4 inner hexagon bolt * 1
• Ground terminal (length, 250mm) * 1
• Natural line (Black) * 1 (For Australia)
• Ground terminal (length, 30mm) * 1 (For other areas)

1.3 Cable Preparation

This section details the preparation of various cables and connectors.

Connectors:

• EPS Connection: R/S/T/N EPS Connector (6 pairs)
• Grid Connection: R/S/T/N Grid Connector (2 pairs)

Grounding:

• Ground terminal (length, 250mm)
• Ground terminal (length, 30mm)
• Natural line (Black) for Australia

Other:

• Switching communication connection

1.4 Mounting

The following steps describe how to mount the unit:

1. Use the provided attachment bag to drill four [drill] 8 holes in the wall. The depth should be at least 80mm.
2. Tighten the expansion tubes into the drilled holes.
3. Pass the expansion screws through M6 washers, then screw them into the expansion tubes. The recommended [torque] is [torque 8.0 Nm].

Note: Affix the empty cabinet on the wall first. It is dangerous to move the cabinet after it is fitted with the switch, as it may exceed the cabinet handle's bearing limit.

After mounting the cabinet, remove the safety bezel. The recommended [torque] for internal connections is [torque 2.0 Nm].

2.1 Connection Overview of Parallel BOX

This section provides an overview of how the Parallel BOX connects to hybrid inverters. The system supports multiple slave inverters (up to 6) connected to a master inverter.

Important Warning! Every cable must be connected according to the correct line sequence (R-R, S-S, T-T, N-N). Any small misoperation may cause the system to fail.

Connections detailed in this part include:

• 2.3 EPS Connection
• 2.4 Back-up Load Connection
• 2.5 GRID Connection
• 2.7 Communication Connection

2.5 GRID Connection

Connection of Parallel Box side:

Make Grid cables:

1. Remove 18mm insulation from cable ends.
2. Insert the stripping terminal and press the terminal head with the blank holder. [crimp]

Screw cables:

1. Screw cables through the GRID port on the bottom of the BOX to the corresponding Load ports (R-bar, S-bar, T-bar, N-bar, G-bar) using a screwdriver. The recommended [torque] is [torque 4.0 Nm].

Grounding Note:

• For users in most countries: Find a ground cable from the accessories and short-circuit the N-bar of EPS with PE.
• For Australian users: Find a Natural line (Black) from the accessories to connect the N terminal of the Grid Connect with the N-bar of EPS.

Connection of Grid distribution box side: Grid port connection depends on field wiring conditions and is not described in detail here.

2.7 Communication Connection

Connection of Parallel Box side:

Make communication cables:

• For X3-Hybrid/Fit G2 inverter: Remove 4mm insulation from cable ends. Insert the cable into the green terminal in the accessory bag, then use a screwdriver to tighten the cable and insert it into the corresponding port. Recommended [torque] is [torque 0.2±0.1 Nm].
• For X3-Hybrid G4 inverter: Use a common network cable. Remove 4mm insulation from cable ends. Insert the cable into the RJ45 terminal in the accessory kit, then use diagonal pliers to tighten the cable and insert it into the corresponding port.

Connection of Inverter side (refer to Inverter User Manual for details):

1. Prepare a connector and two communication cables.
2. Unscrew the nut of the connector on the bottom of the inverter and insert two communication cables through it.
3. Disconnect the insulation layer of the communication cable. Insert one side of the cable corresponding to the GND and EPS port into pin 5 and pin 6 holes of the 8-pin positive terminal in the accessory bag. Recommended [torque] is [torque 0.2±0.1 Nm].
4. Insert the positive terminal into the corresponding negative terminal block inside the inverter and screw it tightly. Recommended [torque] is [torque 0.4±0.1 Nm].

Note for X3-Hybrid G4: It is recommended to connect the CAN port on the left of "Master" to the X3-Parallel Box and the CAN port on the right to "Slave".

2.6 Ground Connection

1. Find a longer ground cable from the attachment.
2. Connect the ground terminal inside the cabinet and the ground terminal of the chassis using the ground cable and tighten the screws.

Finally, install the upper cover of the machine and tighten the screws.

2.3 EPS Connection

This section is referenced in the overview but the detailed steps are not provided in the OCR text for this specific subsection number.

2.4 Back-up Load Connection

This section is referenced in the overview but the detailed steps are not provided in the OCR text for this specific subsection number.

CAN-CAN Connection:

Insert one side of a CAT7 cable into the CAN port of the first inverter and the other side into the CAN port of the next inverter.

RS485-Meter Connection:

Insert one side of a CAT5 cable into the RS485 port of the meter and the other side into the CAN 1 port of the first inverter or the CAN 2 port of the last inverter.

Note: The inverter connected with the meter will be the Master Inverter and must be connected to a battery.

Work Modes:

• Free mode: All inverters are in free mode if no inverter is set as "Master".
• Master mode: The inverter set as "Master" enters master mode. Master mode can be changed to free mode.
• Slave mode: Once an inverter is set as "Master", all other inverters automatically enter slave mode. Slave mode cannot be changed from other modes via LCD settings.

"Master Inverter" Setting in LCD Display:

1. Locate the inverter connected to the Solax meter.
2. Navigate to the setting page on the inverter's LCD screen.
3. Click on "parallel settings" and select "master control".
4. Enter the "resistance switch" setting and set it to "ON".
5. Find the last slave inverter in the parallel system.
6. Enter its LCD setting page and set its "resistance switch" to "ON".

Note: Once an inverter is set as "Master", all other inverters will automatically enter "slave mode".

Exiting the Parallel System:

1. Disconnect all network cables from the CAN port.
2. Disconnect all power cables (R/S/T/N/PE) connected to the X3-Parallel Box.
3. Enter the setting page, click "parallel setting", and choose "Free".

Main Display:

When the inverter enters the parallel system, "today yield" is replaced by "Inveter Class". Parallel-related faults have higher priority and are displayed first.

• Example Display: Power: 5688W, Today: 20.5KWh, Battery: 67%, Status: Normal
• Parallel Display (Master): Power: 5688W, Parallel: Master, Battery: 67%, Status: Normal
• Parallel Display (Slave): Power: 5688W, Parallel: Slave1, Battery: 67%, Status: Normal

Status Display:

All status data can be obtained from the master inverter. System power and individual slave inverter power are visible in the master inverter's status display.

Navigation: Menu > Status > Parallel Status > All / Grid / Solar / Load

Note: "Slave1", "Slave2" indicate the total number of online inverters.