Integrating Victron Energy and SolarEdge Inverters for AC-Coupled Systems

Key Takeaways

• SolarEdge HDwave inverters require "Alternative Power Source mode" (APS) for AC-coupling with Victron Energy systems.
• Specific firmware versions (e.g., 4.8.24 for SetApp) are mandatory for APS mode functionality.
• Configuration involves setting frequency-power droops (P(f)) and communication protocols like Modbus TCP and SunSpec.
• For safety and optimal performance, ensure all settings match between Victron and SolarEdge, and consult a professional for complex setups.

How to Integrate Victron Energy and SolarEdge Inverters for AC-Coupled Systems

Integrating Victron Energy inverter/chargers with SolarEdge inverters allows for robust AC-coupled systems capable of continuous solar production during grid outages or in off-grid scenarios. This setup also enables zero feed-in to the grid when operating in On-Grid mode. The key to this integration is SolarEdge's "Alternative Power Source mode" (APS), which facilitates communication and power management between the two systems.

Compatibility and Initial Checks

Before beginning the integration process, verify the compatibility of your SolarEdge inverter and ensure necessary components are in place.

1. Verify SolarEdge Inverter Model and Type

The integration feature is available for SolarEdge HDwave inverters. This APS feature is only available for 3-phase and 1-phase HDwave inverters.

2. Check SolarEdge Firmware Version

Specific firmware versions are required to enable the Alternative Power Source mode:

• For SetApp (screenless) inverters: Firmware 4.8.24 or higher is needed.
• For LCD inverters: Firmware 3.25xx or higher is needed.
• Note on US models: US models currently lack Frequency Control, and are therefore not compatible with this integration method.

3. Essential Hardware for Integration

• Dry-contact: A dry-contact is required for sensing the grid supply. Victron’s auxiliary Dry-Out can also be used for this purpose.
• SolarEdge grid meter: A SolarEdge grid meter is required for Zero feedback functionality, especially when aiming for zero export to the grid.

Configuring SolarEdge Inverters for APS Mode

The following steps detail the configuration required on your SolarEdge inverter to enable Alternative Power Source (APS) mode and ensure proper communication with a Victron Energy system.

1. Configure Alternative Power Source Mode

This setting enables the inverter to operate with alternative power sources.

• For SetApp (screenless) inverters: Navigate to Commissioning -> Communication -> GPIO -> Power Reduction Interface (RRCR) Mode -> Alternative Power Source.
• For LCD inverters: Navigate to Communication -> GPIO Conf -> Device Type -> Alternative Power Src.
• • When integrating multiple SolarEdge inverters, configure this setting on the master inverter. It will automatically apply to slave inverters.

2. Set P(f) (Frequency-Power) Droop Settings

These settings define how the inverter reduces power output based on grid frequency, crucial for off-grid operation.

• For SetApp (screenless) inverters: Go to Power Control -> Alternative Power Source -> P(f). Edit P0 to 50.2Hz, 100% Power and P1 to 51.2Hz, 0% Power.
• For LCD inverters: Go to Power Control -> Alt Power Src-> P(f). Edit P0 to 50.2Hz, 100% Power and P1 to 51.2Hz, 0% Power.
• • The Victron Energy VE.Bus Config is designed to reduce its output power at 50.2Hz, reduce output to a minimum at 51.2Hz, and disconnect above 51.5Hz, aligning with these SolarEdge settings.

3. Configure Modbus TCP Port

This enables communication between the SolarEdge inverter and the Victron GX device.

• For SetApp (screenless) inverters: Navigate to Communication -> Modbus TCP port -> Modbus TCP. Edit the port to 502.
• For LCD inverters: Navigate to Communication -> LAN Conf -> Modbus TCP -> TCP Port. Edit the port to 502.

4. Set Up SunSpec Protocol

SunSpec is a standard protocol for monitoring and control of PV systems.

• For SetApp (screenless) inverters: Go to Communication -> RS481 -> Protocol -> SunSpec (Non-SE Logger) -> Device ID. Edit the Device ID to 126.
• For LCD inverters: Go to Communication -> RS481 -> Device Type -> Non-SE Logger -> Device ID. Edit the Device ID to 126.
• • After completing the SunSpec setup, you can re-configure RS485-1 for your SolarEdge Grid meter. The SunSpec setting will remain in the memory of the SolarEdge inverter. The SolarEdge meter is still required for a zero export setup.

5. Enable Grid Control (for multiple inverters)

If you have multiple SolarEdge inverters, enable Grid Control on all of them.

• Navigate to Power control -> Grid Control -> Enable.

6. Set a Static IP Address for the SolarEdge Inverter

It is advised to edit the SolarEdge inverter’s IP address to a static IP by disabling DHCP. Edit the desired IP address for your SolarEdge inverter and then search for the IP address on your DX Device. The SolarEdge inverter will appear on your GX device screen.

7. Multiple SolarEdge Inverter Integration

When integrating multiple SolarEdge inverters:

• The inverters need to be interconnected via RS485-1, with a Leader, follower configuration.
• Only the Leader SolarEdge inverter requires the dry-relay contact connection.
• Only the Leader SolarEdge inverter requires the GPIO setting to Alternative Power Source configuration.
• Setup the frequency shifting bandwidth for all the SolarEdge inverters on site.
• Each inverter requires its own TCP connection and IP address with the same SunSpec setting for each inverter.

Configuration Steps Overview

Safety: Working with Inverter Systems

Working with solar inverters and battery systems involves high voltages and currents. Always prioritize safety.

• Isolate Power: Before performing any physical connections or disconnections, isolate all power sources including PV, battery, and AC breakers.
• Wait for Discharge: Allow sufficient time for capacitors to discharge after isolating power.
• Insulated Tools: Use only insulated tools when working with electrical connections.
• Personal Protective Equipment (PPE): Wear appropriate PPE, including safety glasses and insulated gloves.
• Authorized Service: Opening the inverter enclosure or replacing internal components should only be performed by authorized service personnel.

When to call a technician instead

While this guide provides detailed steps for integrating Victron Energy and SolarEdge inverters, complex installations or persistent issues may require professional assistance.

• Unresolved Errors: If you encounter error codes or system behavior not covered in this guide, or if troubleshooting steps do not resolve the issue.
• Advanced Configurations: For systems with unique requirements, complex load management, or advanced grid-tie interactions.
• Warranty Concerns: Improper installation or configuration can void product warranties. If you are unsure about any step, contact a certified installer or the manufacturer's support.
• US Models: Remember that US models currently lack Frequency Control and are therefore not compatible with this specific AC-coupling method. Attempting to force this integration may lead to system instability or damage.