Victron Solar MD SS4074 & Logger V2 Integration Setup Guide

Key Takeaways

• A Victron GX device is essential for CAN-bus communication with Solar MD batteries, requiring specific firmware versions.
• The Solar MD LOGGER V2 manages battery communication and receives automatic software updates when connected to the internet.
• Properly size your Solar MD battery bank to your solar array to prevent over-current alarms and ensure system stability.
• Always confirm all Victron and Solar MD component firmware versions are up-to-date before system integration to avoid communication issues.

How do I set up Solar MD SS4074 batteries with Victron systems?

Setting up Solar MD SS4074 batteries with Victron systems primarily involves establishing a CAN-bus connection between the Solar MD LOGGER V2 and a Victron GX device. This integration ensures proper communication of critical battery data, such as charge and discharge limits, error codes, and state of charge, which is vital for system stability and battery longevity. The first step is to verify all component firmware versions meet the minimum requirements.

Diagnosis and Troubleshooting Steps

When integrating Solar MD SS4074 batteries with Victron equipment, communication and detection issues are common. Follow these steps to diagnose and resolve problems.

1. Check GX Device Connection:

• • Observation: The Victron GX device is not detecting the Solar MD battery or is showing communication errors.
  • Meaning: The CAN-bus connection might be faulty, or the GX device firmware is outdated.
  • Action: Ensure the CAN-bus cable is securely connected between the Solar MD LOGGER V2 and the Victron GX device. Verify the GX device is running minimum firmware version v2.15 or later.

2. Verify Inverter/Charger Firmware:

• • Observation: The inverter/charger (Multiplus, Quattro, EasySolar) is not interacting correctly with the battery, or charging parameters seem off.
  • Meaning: The inverter/charger firmware may not be compatible with the Solar MD integration.
  • Action: Confirm that your Victron inverter/charger has a minimum firmware version of 422. These units must also be connected to the GX device via the VE.Bus connection port.

3. Inspect MPPT Firmware and Connection:

• • Observation: Your MPPT solar charge controller is not charging the battery, or displays error #67.
  • Meaning: MPPT firmware is outdated, or the GX device is disconnected from the MPPT. Error #67 specifically indicates "no BMS" communication.
  • Action: For MPPTs with a VE.Direct port, ensure the MPPT firmware is v1.39 or the latest available version. For MPPTs with a VE.Can port, the firmware should be at least version 2.05. Reconnect the GX device to the MPPT if it was disconnected.

4. Check LOGGER V2 Firmware and Internet Connection:

• • Observation: The Solar MD battery is not detected, or communication is intermittent, despite correct physical connections.
  • Meaning: The LOGGER V2 firmware might be too old, or it lacks an internet connection for automatic updates.
  • Action: The minimum Solar MD LOGGER V2 firmware version required is 6.13_15-Mar-2017. All software updates for Solar MD equipment are performed remotely and automatically as soon as the LOGGER V2 has an internet connection. Ensure your LOGGER V2 is connected to the internet to receive necessary updates.

Common Causes and Fixes

This table outlines specific symptoms, their likely causes, and recommended fixes for Solar MD SS4074 battery integration with Victron systems.

System Integration and Configuration

Successful integration of Solar MD SS4074 batteries with Victron systems relies on correct component selection, firmware versions, and communication setup.

Essential Components and Firmware Requirements

A Victron GX device is essential for the CAN-bus connection with Solar MD batteries. This connection provides the keep-alive signal and facilitates the communication of charge and discharge limits, error codes, and state of charge.

• Victron GX device: Minimum firmware version v2.15.
• Victron Inverter/Charger (Multiplus, Quattro, MultiGrid): Minimum firmware version 422. These units must connect to the GX device via the VE.Bus port.
• Victron MPPTs with VE.Direct port: Recommended for proper operation. GX device firmware v2.15 or later, and MPPT firmware v1.39 or the latest available version.
• Victron MPPTs with VE.Can port: Firmware at least version 2.05. When using VE.Can MPPTs, it is recommended to use the Venus GX (VGX) instead of the Color Control GX (CCGX).
• Solar MD LOGGER V2: Minimum firmware version 6.13_15-Mar-2017. All software updates for Solar MD equipment are done remotely and automatically as soon as the Logger V2 has an internet connection.

Minimum Battery Modules for SS4074 (7.4kWh)

The following table outlines the minimum number of 7.4kWh Solar MD SS4074 battery modules required for various Victron inverter/charger configurations, depending on the system's phase and application (self-consumption or off-grid).

For more detailed information on configuring your Victron Energy Storage System (ESS), consult Victron's official ESS documentation.

Safety: Lithium Battery Considerations

Solar MD batteries are lithium-ion batteries and incorporate an integrated Battery Management System (BMS) for safe operation. However, general safety practices for lithium systems must be followed.

• Temperature Management: Temperature effects on charge rates should be considered in the design stage, especially in extreme hot and cold climates. Operating outside recommended temperature ranges can reduce battery life and performance.
• No Disassembly: Never attempt to open the battery enclosure. Lithium batteries contain sensitive electronics and chemicals. Opening the unit can expose you to hazards and will void the warranty.
• Short Circuit Prevention: Use insulated tools when working near battery terminals. A spanner across a battery bank can short hundreds of amps, causing severe burns and equipment damage. Always disconnect power sources (PV, AC, battery) before working on connections.
• BMS Protection: The integrated BMS protects the battery from overcharge, over-discharge, over-current, and extreme temperatures. Do not attempt to bypass or modify the BMS.

When to call a technician instead

While many setup and troubleshooting steps can be performed by the user, certain situations require professional assistance to ensure safety and maintain warranty validity.

• Persistent Communication Errors: If, after verifying all connections and firmware versions, the Victron GX device still fails to communicate reliably with the Solar MD LOGGER V2, a technician may need to diagnose deeper CAN-bus or hardware issues.
• Internal Battery Faults: Any indication of an internal battery fault, such as unusual smells, swelling, or persistent error codes not related to communication, requires immediate professional inspection. Do not attempt to repair internal battery components yourself.
• Complex System Expansion: For large-scale system expansions or modifications involving multiple battery modules and inverters beyond basic setup, a certified installer can ensure optimal configuration and safety.
• Warranty Concerns: Attempting unauthorized repairs or modifications to the Solar MD battery or LOGGER V2 will void the manufacturer's warranty. If you suspect a hardware fault, contact Solar MD or your installer.