Victron Cegasa Battery Compatibility: Setup and Settings Guide

Key Takeaways

• A Victron GX device is essential for communication between Victron inverters/chargers and Cegasa eBick LV batteries.
• Correct VEConfigure settings for charge parameters and inverter cutoffs are critical for system stability and battery health.
• Adhering to minimum battery sizing recommendations is important for system performance and manufacturer support.
• Ensure all Victron components, especially the GX device and inverter/charger, are running the minimum required firmware versions.

How do I set up Victron inverters with Cegasa eBick LV batteries?

Setting up Victron inverters and chargers with Cegasa eBick LV batteries primarily involves establishing proper communication via a GX device and configuring the correct parameters in VEConfigure. The most common issues arise from incorrect wiring of the BMS-Can connection or misconfigured settings, leading to communication errors or improper battery charging/discharging. The first step in troubleshooting or setting up is to ensure your GX device is correctly connected and running the minimum required firmware.

Diagnosis and Setup Steps

Follow these steps to diagnose communication issues or correctly set up your Victron-Cegasa eBick LV battery system:

1. Verify GX Device Requirement:

• • Check: Confirm you are using a Victron GX device (e.g., Cerbo GX).
  • Meaning: A GX device is essential for BMS-Can communication with Cegasa batteries. This communication transmits charge and discharge limits, error codes, and state of charge. Using a CCGX is not recommended as it only has a single VE.Can port.
  • Action: If no GX device is present, install one.

2. Check Firmware Versions:

• • Check: Verify the firmware version of your GX device and Victron inverter/charger.
  • Meaning: The minimum supported firmware version for the GX device is v2.22. The minimum supported firmware version for the inverter/charger is 469.
  • Action: Update firmware if necessary.

3. Configure Cegasa BMS:

• • Check: Access the Cegasa EViewer WebApp.
  • Meaning: You need to configure the inverter type within the Cegasa BMS.
  • Action: Follow Cegasa's instructions within the EViewer WebApp to set the inverter type.

4. Connect BMS-Can Cable:

• • Check: Ensure a CAT5e or CAT6 network cable is connected between the Cegasa BMS and the BMS-Can port of the GX device.
  • Meaning: This cable facilitates the critical BMS-Can communication.
  • Action: Securely connect the cable.

5. Install VE.Can Terminator:

• • Check: Confirm a VE.Can terminator (supplied with the GX device) is connected to the other BMS-Can port of the GX device.
  • Meaning: The terminator is required for proper CAN-Bus network operation.
  • Action: If missing, install the terminator.

6. Verify GX Device Recognition:

• • Check: Power on the GX device and navigate through its menus.
  • Meaning: The Cegasa battery should appear in the GX device menus, indicating successful communication.
  • Action: If the battery does not appear, recheck wiring and firmware.

7. Configure VEConfigure General Tab:

• • Check: Access VEConfigure software for your Victron inverter/charger.
  • Meaning: Specific settings are required for proper battery management.
  • Action:
  • • Check the "Enable battery monitor" function.
    • Set the battery capacity to the total capacity of your battery bank (e.g., 280Ah times the number of battery modules).
    • Set the Charge Efficiency to 95%.

8. Configure VEConfigure Charge Parameters:

• • Check: Ensure correct charge settings are applied in VEConfigure.
  • Meaning: These settings dictate how the Victron system charges the Cegasa eBick LV batteries.
  • Action: Apply the following settings:
  • • Battery type: Lithium
    • Charge curve: Adaptive
    • Absorption voltage: 52.2 V
    • Float voltage: 52 V
    • Absorption time: 8 Hr
    • Charge Current: 140A per battery module

9. Configure VEConfigure Inverter Parameters:

• • Check: Ensure correct inverter settings are applied in VEConfigure.
  • Meaning: These settings protect the battery from excessive discharge.
  • Action: Apply the following settings:
  • • DC input low shut-down: 44V
    • DC input low restart: 48V
    • DC input low pre-alarm: 45V

Common Compatibility Issues and Fixes

Victron-Cegasa eBick LV System Configuration

Proper configuration of your Victron system with Cegasa eBick LV batteries involves ensuring all components are correctly sized, connected, and programmed. This section details the essential settings and compatibility considerations.

Minimum Battery Sizing for eBick LV Modules

The number of Cegasa eBick LV modules required depends on your Victron inverter/charger model, system phase, and whether it's an Energy Storage System (ESS) or Off-grid application. This table specifies the minimum number of 13.5 kWh eBick LV modules. For eBick LV 15 modules (15 kWh), the same minimum module count applies.

VEConfigure Settings for Charge and Inverter Parameters

These settings are crucial for the safe and efficient operation of your Cegasa eBick LV batteries with Victron equipment. They must be applied using the VEConfigure software.

VEConfigure Charge Parameter Settings

VEConfigure Inverter Parameter Settings

Communication Protocol

The Victron system communicates with Cegasa eBick LV batteries using the BMS-Can protocol. This requires a Victron GX device to act as the interface. The GX device receives critical information from the Cegasa Battery Management System (BMS), such as charge and discharge limits, error codes, and the battery's state of charge. This ensures the Victron inverter/charger operates within the battery's safe parameters.

Safety Considerations

Working with high-voltage battery systems requires strict adherence to safety protocols. Lithium-ion batteries, while generally safe, can pose risks if mishandled.

• Battery Sizing: Using very large solar arrays with battery banks that are too small can exceed the limits of the batteries' ability to charge. This can lead to the BMS triggering over-current alarms and system shutdowns. Always ensure your battery bank is adequately sized for your solar input and load requirements.
• Off-Grid Systems: For off-grid systems, it is strongly recommended to ensure there is a minimum of DC-Coupled PV (i.e., an MPPT Solar Charger) in the system, not only AC-Coupled PV. Both Cegasa and Victron may be reluctant or refuse to give support to systems that are not sized according to the minimum battery configuration table.
• Temperature Effects: Temperature effects on charge rates should be considered in the design stage, especially in hot and cold climates. Extreme temperatures can impact battery performance and lifespan.
• Electrical Safety: Always disconnect all power sources (PV, battery, AC grid) before making or breaking electrical connections. Use insulated tools to prevent accidental short circuits, which can cause severe damage or injury. A spanner across a battery bank can short hundreds of amps, leading to extreme heat and fire.

When to call a technician instead

While many setup and configuration tasks can be performed by a competent DIY installer, there are situations where professional assistance is necessary.

Call a qualified solar technician if:

• You are unsure about any wiring diagrams or electrical connections.
• You encounter persistent communication errors that cannot be resolved by following the steps above.
• The system exhibits unusual behavior, such as unexpected shutdowns, alarms, or charging/discharging irregularities, after verifying all settings.
• You are installing a complex multi-inverter or three-phase system, as these require advanced knowledge of system design and commissioning.
• You are unable to update firmware or access the necessary configuration software.

Attempting to diagnose or repair complex electrical issues without proper training and tools can be dangerous and may void your warranty. Both Cegasa and Victron will be reluctant or even refusing to give support to systems that are not sized according to the minimum battery configuration table, or if unauthorized modifications are made.