Victron MPPT PV Short Relay Reset Procedure

Key Takeaways

• The PV Short Relay protects specific Victron MPPT models by shorting the PV input.
• Errors 80 to 87 indicate the PV Short Relay has triggered and the charger is not operating.
• A stable 12V power supply to the battery terminals is required for the reset procedure.
• Some older serial numbers of the SmartSolar VE.Can MPPT 250/100 may require professional assistance if the reset fails.

Why is my Victron MPPT showing an error and not charging?

If your Victron SmartSolar VE.Can MPPT 250/100 is displaying errors from 80 to 87 and is no longer charging, it indicates that the internal PV Short Relay protection has activated. This protection consists of a latching relay mounted across the PV Input. The relay can mistrigger if a higher battery voltage than configured in the Solar Charger is applied, and then the PV Array is connected.

Diagnosis

Follow these steps to confirm the PV Short Relay has triggered and to prepare for the reset procedure.

1. Check for Error Codes: Access your Victron MPPT's status via VictronConnect. Confirm that the charger is showing an error from 80 to 87. These errors signify the PV Short Relay has engaged.
2. Inspect PV Input Resistance: With the PV input disconnected, use a multimeter set to resistance mode. Measure the resistance across the PV input terminals on the MPPT. If the PV Short Relay is active, the multimeter will show a few Ohms or lower.
3. Verify MPPT Model and Serial Number: This protection is applicable to SmartSolar VE.Can MPPT 250/100 models with serial numbers HQ2150 and newer. Locate your unit's serial number to confirm it falls within the affected range.

Cause/fix table section

Reset Procedure for the Victron MPPT PV Short Relay

To reset the PV Short Relay, you will need a 12V power source and the VictronConnect application.

1. Disconnect the PV Input: Ensure all PV input terminals are disconnected from the solar charger. This is a critical first step to prevent further issues during the reset.
2. Power the Solar Charger with 12V: Connect a 12V battery or a bench power supply set to 12V to the solar charger's battery terminals. It is important that the voltage at the solar charger battery terminals remains under 15V, as the reset button is disabled in VictronConnect if the voltage is higher.
3. Verify Firmware and App Versions: The reset procedure requires firmware version v3.12 or later to be installed on the Solar Charger. You will also need VictronConnect v.580 or later installed on your device (phone, tablet, or computer). Update these if necessary before proceeding.
4. Initiate Reset via VictronConnect:

• • Open the VictronConnect application and connect to your MPPT.
  • Navigate to the settings menu within the app.
  • Locate and select the "Reset PV Short Relay" option.
  • Follow any on-screen prompts to complete the reset.

After the reset, you can reconnect your PV array. The charger should now operate normally without errors 80 to 87.

Safety

Working with solar power systems involves electrical hazards. Always prioritize safety.

• Disconnect Power: Before performing any work on your MPPT or PV array, ensure all power sources are disconnected. This includes the PV array, battery bank, and any AC connections.
• Insulated Tools: Use only insulated tools to prevent accidental short circuits. A spanner across a battery bank can short hundreds of amps, causing severe burns or equipment damage.
• Eye Protection: Always wear appropriate eye protection when working with batteries or electrical components.
• Correct Polarity: When connecting the 12V supply for the reset, double-check that the positive and negative terminals are connected correctly to avoid damage to the MPPT.

When to call a technician instead

While the PV Short Relay reset is a straightforward procedure, there are instances where professional assistance is necessary.

• Persistent Failure: If you have followed all steps precisely and the PV Short Relay continues to trigger, or the reset procedure does not clear the error, a deeper issue may be present.
• Specific Serial Numbers: For SmartSolar VE.Can MPPT 250/100 units with a serial number between HQ2150 and HQ2250, the reset procedure often does not work. In these cases, contact your Victron dealer for support.
• Uncertainty: If you are unsure about any step in the diagnosis or reset procedure, or if you are uncomfortable working with electrical components, it is safer to consult a qualified solar technician. Attempting repairs without proper knowledge can lead to further damage or personal injury.