Introduction

The Nominal AC output power of X3-Hybrid G4 is restricted to 5.0-15kW, therefore, it can’t be applied to the scenarios where users require more power. Considering this, SolaX provide a solution -- X3-Hybrid parallel solution, which makes it to multiply the power range. In this solution, there are 2 methods to transfer between On-grid & Off-grid status:

1. Internal ATS (Up to 3 inverters parallel; External ATS should be set as Disable)
2. External ATS through EPS Parallel Box (Up to 10 inverters parallel, but switching time is longer; External ATS should be set as Enable)

Notes: Before operation, please make sure that the inverter meets the following four conditions.

1. The software version of all inverters shall be the same;
2. The power range of all inverter models shall be the same;
3. The type and quantity of batteries connected to all inverters shall be the same, or this function cannot be used.
4. X3 Matebox-advanced is not compatible to parallel solution.

Advantages

Robust backup capacity

More energy stored will make user deal with Off-grid situation more leisurely.

Flexible

Greater power range can meet more requirements, and be applied to more scenarios.

Configuration

Cable Connection

It is strongly required that every cable must be connected according to correct line sequence (R-R, S-S, T-T, N-N), otherwise any small misoperation may cause the system running failed. Incorrect line sequence will damage the inverter. To avoid the damage, the default “Disable” has been set to “Enable” in “External ATS” under "Advance Settings".

1. The system X3-EPS Parallel Box G2 (Internal ATS)

Please connect the cables strictly according to diagram below.

Up to 3 inverters can be connected in this solution.

X3-Hybrid G4 Parallel Solution —— Without X3-EPS Parallel Box

2. The system with X3-EPS Parallel Box G2 (External ATS)

Please connect the cables strictly according to Diagram below.

Up to 10 inverters/150kW can be connected with X3-EPS PBOX-150kW-G2;

Up to 6 inverters/60kW can be connected with X3-EPS PBOX-60kW-G2.

X3-Hybrid G4 Parallel Solution ——With X3-EPS Parallel Box

Power Cable Wiring

1. The system without X3-EPS Parallel Box G2 (Internal ATS)

Power Cable Connection —— Without X3-EPS Parallel Box

Note:

• The system requires five-core copper cable for grid connection and four-core copper cable for EPS connection between master and slave inverter connection.
• Master and Slave inverter’s terminal should be connected correspondingly: L1 to L1, L2 to L2, L3 to L3 and N to N. (For both Grid ports and EPS ports connection)
• All PE cable connects to the E-BAR nearby

2. The system with X3-EPS Parallel Box G2 (External ATS)

Power Cable Connection —— With X3-EPS Parallel Box

Note:

• The system requires five-core copper cable for grid connection and four-core copper cable for EPS connection between master and slave inverter connection.
• Master and Slave inverter’s terminal should be connected correspondingly: L1 to L1, L2 to L2, L3 to L3 and N to N. (For both Grid ports and EPS ports connection)
• All PE cable connects to the E-BAR nearby
• For X3-EPS PBOX-60kW-G2, it supports up to 6 inverters but the total system power should be below than 60kW. For example, for X3 Hybrid G4 15kW, only 4 inverters can use in this system. For X3-EPS PBOX-150kW-G2, it supports up to 10 inverters.

Communication Cable Wiring

1. The system without X3-EPS Parallel Box G2 (Internal ATS)

Communication Cable Connection —— With X3-EPS Parallel Box

Note:

• Use standard network cables for connection between Master inverter and Slave inverter.
• Master CAN2 connects o Slave 1 CAN1.
• Slave 1 CAN2 connects to Slave 2 CAN1; Other inverters are connected in such way.
• Meter connects to Meter/CT terminal of the Master inverter.

2. The system with X3-EPS Parallel Box G2 (External ATS)

Communication Cable Connection —— With X3-EPS Parallel Box

Note:

• Use standard network cables for connection between Master inverter and Slave inverter, and master inverter and X3-EPS Parallel Box respectively.
• Master CAN1 connects to the COM terminal of X3-PBOX device.
• Master CAN2 connects o Slave 1 CAN1.
• Slave 1 CAN2 connects to Slave 2 CAN1; Other inverters are connected in such way.
• Meter connects to Meter/CT terminal of the Master inverter.

3. X3 Hybrid G4 Pin Definition

PIN Definition (CAN1)

PIN Definition (CAN2)

PIN Definition (Meter/CT)

Setting & Commission

1. Parallel Setting

Setting path: Status

Main → Settings → Advance Setting → Parallel Setting → Parallel Setting.

There are 2 settings chosen:

Free

Master

Select Master on the master inverter (connected to the meter/CT directly), and other inverters will be slave inverters automatically.

Setting path: Resistance Switch

Main → Settings → Advance Setting → Parallel Setting → Resistance Switch

There are 2 settings chosen:

OFF

ON

Select ON on the master inverter and the last slave inverter in the parallel system.

Note:

If a slave inverter is set to Free mode but not disconnect the network cable, this inverter will return to Slave mode automatically.

If a slave inverter is disconnected with master inverter but not be set to Free mode, this slave inverter will stop working and prompt Parallel Fault.

2. Meter/CT Setting

Setting path:

Main → Settings → Advance Setting → Meter/CT Settings

As for Internal ATS solution, 200A CT (309301004800) is optional.

Please select 200 under Meter/CT Setting → CT Type.

As for External ATS solution with more inverters, a meter with CT is recommended.

Compatibility

Hardware version:

X3-Hybrid/Fit G4.1 X3-Hybrid/Fit G4.2

X3-Hybrid/Fit G4.3 X3-Hybrid/Fit G4.4

Software version:

ARM≥V1.18 DSP≥V1.19