1. Note that:
1. Multiple inverters cannot share one circuit breaker. Loads cannot be connected between inverters and circuit breakers.
2. The total number of SG25-50CX and SG110CX without feed-in limitation inverters in parallel cannot exceed 30.
3. The total number of SG110CX and SG125CX-P2 inverters with feed-in limitation in parallel cannot exceed 25.
4. If the number of inverters, connected in parallel via RS 485 exceeds the number of 15, it is necessary to configure RS485-dip switch (SW1) to ensure the communication quality. The shielding layer of the communication cable should be grounded at a single point and the length of the RS485 cable should be less than 1200m.
2. How to set the parallel mode of SGCX inverters
Communication wiring SG30-50CX
For multi-inverter communication via RS485 cables of < 15 inverters in daisy chain, follow the indications from the pictures:
For multi-inverter communication >= 15 inverters in daisy chain, include a 120 Ohms resistance to the first logger and follow the indications from the pictures to ensure communication quality:
Communication wiring SG110CX
The communication wiring board of the SG110CX model looks such as:
where the RS485 communication wiring board for the SG110CX inverter. For multi-inverter communication < 15 inverters in daisy chain, follow the indications from the pictures:
For multi-inverter communication >= 15 inverters in daisy chain, include a 120 Ohms resistance to the first logger and follow the indications from the pictures to ensure communication quality:
Communication wiring for SG33-50CX-P2
For further information on how to assemble the COM connecter please follow the detailed instructions in UM section 5.8.3
Communication wiring SG125CX-P2
The RS485 communication wiring board for the SG125CX-P2 inverter:
Note: RJ45 and terminal block are two types of RS485_1 interface with same functions and different wiring methods. Choose one of the interfaces for wiring
The communication wiring is done as followed:
For further information, please download the user manual for:
This manual is intended for professional technicians who are responsible for installation, operation, maintenance and troubleshooting of inverters, and users who need to check inverter parameters. The inverter must only be installed by professional technicians.
The professional technician is required to meet the following requirements:
Know electronic, electrical wiring and mechanical expertise, and be familiar with electrical and mechanical schematics.
Have received professional training related to the installation, commissioning and troubleshooting of electrical equipment.
Be able to quickly respond to hazards or emergencies that occur during installation, commissioning and troubleshooting.
Be familiar with local standards and relevant safety regulations of electrical systems.
Read this manual thoroughly and understand the safety instructions related to operations.