S6-EH3P 10K Generator Function

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S6-EH3P 10K

 Generator Function

Introduction

In off-grid conditions, maintaining a stable and continuous power supply is crucial for the smooth operation of your critical loads. The S6 10 K 3 Phase inverter models are designed to seamlessly integrate with generators, ensuring that your essential devices remain powered even during extended outages. This guide will walk you through the process of connecting a generator to your S6 10 K inverter. By properly setting up the generator port, the inverter can automatically start the generator and manage the power distribution to both your loads and battery system. Follow these steps to ensure that your power setup is reliable and efficient, keeping your operations running smoothly under all conditions.

Content

• Hardware requirements
• Wiring  
• Communication Cable Connection 
• App configuration
• Generator application scenario 
• Generator using precautions 

 Hardware Requirements 

1. S6 3P10K Hybrid Inverter + Battery + PV + Smart Meter
2. 3-Phase Generator (with remote start function)
3. 1-Phase Load or 3-Phase Load
4. ATS (if applicable)
5. Distribution Cabinet
6. Any Other Necessary Equipment

Wiring 

Since the 10k model does not have a dedicated generator port, we will use the grid port for this function. It's necessary to isolate the generator from the grid or use an ATS (Automatic Transfer Switch) to manage the connection.

Below is the wiring diagram for different scenarios:

Scenario 1: Grid and Generator Isolation Wiring Diagram

Scenario 2: Grid and generator wiring diagram with independent ATS equipment

The difference between Scenario 1 and Scenario 2 is the degree of automation when starting the generator.

Scenario 1: Manual Operation

• After a power grid shutdown, the user needs to manually switch the PDC to the generator.
• The user must then set the generator button in the APP to start the motor, provided the generator starting conditions are met.

Scenario 2: Automated Operation with ATS

• When the power grid is powered off, the ATS automatically switches the connection from the power grid to the generator and sends a signal to the inverter.
• In this scenario, the APP will send a fault notification to the customer.
• The customer can then operate the generator setting via the web or local terminal to start the generator, again ensuring that the generator starting conditions are met.

Communication Cable Connection

The generator must be equipped with a remote start function to enable automatic startup. In this case, you need to connect the generator to the machine using the DI/DO communication port.

The ports definition as below:

• Pin 1&Pin 2：ATS24V
• Pin 3&Pin 4：GND_ATS24V
• Pin 5&Pin 6：Remote control signal A
• Pin 7&Pin 8：Remote control signal B

Scenario 1: Using Remote Start Signal A and Remote Start Signal B

• There's no need to distinguish between the positive and negative poles of A and B.
• Connect both signals directly to the remote start port of the generator.

Scenario 2: Using All Signals

• Connect ATS24V and GND_ATS24V to the communication ports of the independent ATS.
• Connect the remote start signal to the generator's remote start port.

App configuration 

After connecting all the hardware devices, it's essential to configure the inverter via the Solis APP. Failure to do so may result in the inability to start the generator and access other functions normally. In order to configure the inverter you need to be connected to the inverter locally via Bluetooth. On the APP interface, choose the smart port, then select GEN setting. Configure other selections such as Dry contact, Grid port powered by GRID/Generator, Gen charge power, Start charging SOC,

Step 1 – Open the Generator Settings: 

 Step 2 – Configure the settings according to your needs: 

1. You just need to choose the Generator control and ignore the second option.

2. – Choose generator 

3. Fill in the rated output power value of your configured generator onsite.

4. Fill in the start SOC value. When the battery SOC value is lower than this, the generator will start automatically.

5. Fill in the stop SOC value. When the battery SOC value is higher than this, the generator will stop automatically.

Generator application scenario

The  Logic of Generator Start:

After completing the hardware and software configuration of the system, two conditions are required to start the generator. The main start conditions are:

1. BMS communication failure.
2. Battery SOC value < start charging SOC.

When either of the above conditions is triggered, the generator will start.

• Condition 1: If there is a BMS communication failure, the generator will not be ordered to stop by the system unless the battery BMS communication is restored and the battery SOC is greater than the generator stop SOC.
• Condition 2: If the battery SOC value is less than the start charging SOC, the generator will start. When the battery SOC is greater than the generator stop SOC, the system will send a stop command to the generator.

The Logic of Generator Stop:

After the power grid is restored to normal, you should set the generator to stop and switch the PDC (Power Distribution Cabinet) switch to the power grid side to remove the generator usage scenario. The specific setting steps are as follows:

1. Go to the GEN setting interface on your APP.
2. Set the grid as the power source to power the grid port.
3. Manually switch the PDC switch to the grid side (Scenario 1), or the ATS will automatically switch to the grid side after detecting that the grid is stable (Scenario 2).

Generator Usage Precautions

1)

The generators corresponding to Scenario 1 and 2 are equipped with remote start function, enabling generator start and stop control. If you are connecting to a generator that does not have remote start capability, you must start the generator manually. When stopping the generator, follow the generator stop logical steps.

2)

Since the generator port and grid port share the same port on the bottom, the inverter cannot distinguish whether the port is connected to the generator or grid. When using the generator, ensure to set the grid port powered by selecting "Generator" in the settings. This allows the inverter to recognize the generator connection. Failure to do so may result in feeding generator power into the inverter, causing damage to the generator.

3)

If you need to manually switch the state of the port connection and it is not controlled by an ATS onsite, ensure that the generator is shut down. Do not switch operations while the generator is running.

4)

For AC Load, whether the power grid is offline or the generator is switched over to the power grid, the Load is not powered. If uninterrupted power supply for AC Load is critical, ensure that the total load of each single-phase does not exceed 3.3 kW, and the total load of three-phase does not exceed 10 kW. Connect the AC load equipment to the backup port to ensure continuous power supply.

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