HUAWEI Inverter + DEYE Parallels

Parallel Connection of Deye and Huawei Inverters through the Deye Inverter GEN Interface

In photovoltaic or energy storage systems, connecting inverters from different brands in parallel is a way to increase system capacity or achieve complementary functionality. In the case of inverters Deye y Huawei, it is possible to connect them in parallel using the GEN interface of the Deye inverter, allowing communication and coordination between both devices. The specific principles and steps are explained below:

✅ Operating principle

1. GEN Interface Function:

   • In Deye inverters, the GEN interface is used to synchronize communication with other power sources or inverters. It ensures that devices connected in parallel maintain the same phase, frequency and voltage, avoiding interference.

2. Huawei Inverter Connection:

   • The Huawei inverter connects via its communication interface to the GEN interface of the Deye inverter. This allows the Deye inverter to read information from the Huawei inverter, such as output power, voltage and current, thus coordinating the power supply for the connected loads.

3. Coordination after Parallel Connection:

   • The Deye inverter generally acts as the “Master” inverter, controlling the operating logic of the system. The Huawei inverter acts as the “Slave” inverter, adjusting its output power according to the instructions of the Deye inverter. This operating mode avoids conflicts between inverters and improves the efficiency and stability of the system.

Connection Steps

1. Power Cut: Make sure all equipment is turned off before making connections.
2. Connecting the Communication Cable: Use a suitable communication cable to connect the communication interface of the Huawei inverter to the GEN interface of the Deye inverter. Normally, an RS485 cable is used, paying attention to the correct matching of terminals A and B.
3. Configuring Communication Parameters:
   • Set the communication protocol and baud rate on the Deye inverter control interface to match those of the Huawei inverter.
   • Make sure the communication addresses of both inverters are different to avoid conflicts.
4. Verification of Electrical Parameters:
   • Make sure both inverters have the same output voltage and frequency, usually 220V/50Hz or 380V/50Hz, depending on the system configuration.
5. System Start-up:
   • Power on the Deye inverter first, then the Huawei inverter, ensuring that the master-slave relationship is established correctly.
6. System Test:
   • Check the stability of the parallel connected system and test operation under different load conditions to confirm that both inverters work in coordination.

Important considerations

• Compatibility: Although this form of connection is usually possible, it is recommended to check the compatibility of specific models, as some recent models may have differences in communication protocols.
• Communication protocol: Make sure both inverters use the same communication protocol, such as Modbus RTU.
• Load Distribution: The load must be properly distributed among the inverters according to their rated power to avoid overloads.
• Prevention of Circulation Currents: The parallel system must be configured correctly to avoid circulating currents between inverters, which could cause power loss or equipment damage.

✅ Applications

• Residential Solar Energy Systems:The parallel connection of Deye and Huawei inverters enables increased energy storage and supply capacity, meeting the demands of larger loads.
• Industrial and Commercial Systems:In large-scale photovoltaic plants or industrial power supply systems, connecting inverters of different brands helps to optimize investment costs and improve system redundancy.