Victron Freedom Won Battery Compatibility Guide

Key Takeaways

• A Victron GX-device running Venus OS is essential for communication with Freedom Won LiFePO4 batteries.
• Freedom Won LiTE batteries communicate with Victron systems via a CAN Bus protocol.
• Correct voltage settings, including float, bulk, and cut-out, are critical for system stability and battery longevity.
• Always adhere to the maximum kVA values and inverter sizing specified for each Freedom Won LiTE model to maintain warranty and prevent overload.

How do I ensure compatibility between Freedom Won LiFePO4 batteries and Victron systems?

Ensuring compatibility between Freedom Won LiFePO4 batteries and Victron systems primarily involves correct setup of communication via a Victron GX-device and proper configuration of voltage settings. The integration has been extensively developed and tested and is certified and supported by both companies.

Setting up Freedom Won LiFePO4 Batteries with Victron Systems

This section outlines the necessary steps and considerations for integrating Freedom Won LiFePO4 batteries with Victron energy systems.

1. Verify GX-device and Firmware:

• • Check: Confirm that a Victron GX-device running Venus OS is installed in your system.
  • Meaning: In all cases a GX-device running Victron's Venus OS is required to receive, process, and transmit the commands and information communicated by the battery to the Victron system.
  • Action: Ensure the latest available firmware should be installed on the Victron devices. If firmware updates are needed for Freedom Won LiTE batteries, contact support@freedomwon.co.za for assistance.

2. Confirm CAN Bus Connection:

• • Check: Ensure the Freedom Won LiTE battery's Battery Management System (BMS) is connected via a CAN Bus protocol to the Victron GX device.
  • Meaning: The Freedom Won LiTE batteries contain an advanced battery management system (BMS) that communicates via a CAN Bus protocol with the Victron GX device. This is crucial for the battery and inverter to exchange data and operate safely.
  • Action: Verify the physical CAN Bus cable connection. For more details on CAN Bus communication, refer to our guide on understanding CAN Bus in solar systems.

3. Configure Voltage Settings:

• • Check: Review the charge and cut-out voltage settings configured in your Victron system, ensuring they match the Freedom Won specifications.
  • Meaning: Incorrect voltage settings can lead to undercharging, overcharging, or premature battery cut-off.
  • Action: Adjust your Victron inverter/charger settings according to the table below. For 48V systems, the Adaptive Maximum Charge Voltage Limit Set-point (CVL) varies from 54.8V to 55.8V depending on the state of balancing on the particular LiTE.

4. Parallel Battery Configuration (if applicable):

• • Check: If using multiple Freedom Won LiTE batteries in parallel, confirm the master/slave configuration.
  • Meaning: All Freedom Won LiTE models can be connected in parallel with other models of the same capacity, where one LiTE (Master) communicates with the GX device as well as all the other LiTE’s in the system (Slaves). The eTower can be paralleled up to 16 units.
  • Action: Ensure one LiTE is designated as the Master and communicates with the GX device, while others function as Slaves. For eTower, note that the recommended limit is 4 batteries in parallel because systems that require more than 20kWh are usually better accommodated by the Freedom Won LiTE range of high performance batteries.

5. eTower Specific Compatibility:

• • Check: If using Freedom Won eTower batteries, verify your Victron system's CAN bus speed.
  • Meaning: Systems that use a 250kbps CAN bus cannot be used with eTower, for example where they include the older VE.Can MPPTs (box-type).
  • Action: Ensure your Victron components are compatible with the eTower's CAN bus requirements.

Freedom Won LiTE and eTower Settings for Victron Integration

The following table provides key voltage settings for Freedom Won LiFEPO4 batteries when integrated with Victron systems. These values are critical for proper operation and battery health.

Communication and Firmware Considerations

Effective communication between your Freedom Won batteries and Victron system is paramount.

• CAN Bus Protocol: Freedom Won LiTE batteries utilize an advanced Battery Management System (BMS) that communicates via a CAN Bus protocol with the Victron GX device. This allows for real-time data exchange and control. For troubleshooting communication issues, refer to our Victron GX device troubleshooting guide.
• Victron GX-Device: A GX-device running Victron's Venus OS is required in all cases to process and transmit information between the battery and the rest of the Victron system.
• Firmware Updates: It is essential that the latest available firmware should be installed on the Victron devices. For Freedom Won LiTE batteries, contact support@freedomwon.co.za for assistance with updating firmware.

Safety: Protecting Your System and Warranty

Adhering to safety guidelines and manufacturer specifications is crucial for the longevity of your system and to maintain warranty validity.

• Correct Configuration: Freedom Won battery warranties require that you have configured the battery correctly. Incorrect setup can void your warranty.
• Inverter Sizing: Do not exceed the maximum kVA values provided in the specification sheet for each respective model. It is not permissible to install an inverter larger than stated in the LiTE specification sheet regardless of whether the "Limit DC Discharge Power" ESS feature in the GX-device is used. For instances where the grid is not available this power limiting feature will not operate and the battery could thus be overloaded, causing it to trip.
• Discharge Power Limits: The LiTE will also not be able to limit discharge power in the absence of a grid connection. This means that without a grid connection, the battery's protection mechanisms for discharge power may not function as expected, potentially leading to overload if an oversized inverter is used.
• Protection Circuit Breaker: The LiTE contains a protection circuit breaker that is only rated to handle the power-up inrush current of the inverter for up to the capacity stated in the specification sheet. This breaker is not designed for continuous overload protection beyond the specified limits.

When to call a technician instead

While this guide covers essential compatibility and setup, certain situations warrant professional assistance.

• Persistent Communication Errors: If you cannot establish or maintain CAN Bus communication between your Freedom Won battery and Victron GX device despite following the setup steps, a technician can diagnose complex wiring or software issues.
• Unusual Battery Behavior: Any unexpected battery behavior, such as abnormal voltage readings, rapid discharge, or failure to charge, should be investigated by a qualified technician.
• Warranty Concerns: If you are unsure about any configuration step or believe your system might be operating outside of warranty requirements, consult with a certified installer or contact Freedom Won support directly. Attempting unauthorized modifications or exceeding specified limits can void your battery's warranty.
• Firmware Update Difficulties: If you encounter issues updating firmware on either your Victron or Freedom Won devices, especially for the Freedom Won LiTE batteries where support@freedomwon.co.za should be contacted, a professional can ensure the process is completed correctly.