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Warn code 309 (Meter Reverse)

Updated

Before troubleshooting

For installations involving an inverter and smart meter:

  • Single-phase on-grid inverter.
  • Single-phase smart meter.

Prior to troubleshooting Warn code 309, please verify the following:

  1. Confirm that the wiring between the smart meter and inverter is accurately connected.
  2. Ensure the correct pin configuration on the smart meter.
  3. Check the plug and pins used on the inverter.
  4. Examine the connection integrity between the inverter and smart meter.

Root

The export power is higher than the solar power.

To enable communication between the meter and inverter, follow one of the following options:

  • Activate the communication on the OSS (Turn on the register for meter reading). OR
  • Set up the export limit on the inverter's screen.

Possible reasons of causing the fault

  • Wiring issue: The live and neutral wires of the meter are reversed. (But CT part is correct)
  • CT issue: The direction of the CT clamp is reversed. (But L&N line of the meter are correct)
  • CT issue: The two cables of the CT is reversed. (But L&N line of the meter are correct)
  • There is more than one inverter onsite.

Solutions

  1. Turn off the inverter and inspect the power reading on the meter; it should display a positive value. You can also turn on some appliances so that we can see if the data is changing on ShinePhone app. 
    1. Positive Value: Import from the grid. 
    2. Negative Value: Export to the grid. 
  2. Verify if there are multiple inverters onsite; if so, this warning code will likely occur because the export power exceeds the inverter generation.
  3. Ensure that the meter's L line and N line are correctly oriented.
  4. Confirm that the two wiring connections of the CT (Black and White Wires) are correctly positioned.
  5. Validate if the arrow inside the CT clamp is facing the correct direction.
  6. Contact Growatt Australia Engineering Team for Guidance. 

Contact Information:

Growatt New Energy Australia Pty Ltd

Terms and Conditions:

  • Licensed Electrician Requirement:

    • All electrical work, including but not limited to measurements, cable removal, plug handling, installation, and maintenance, must be conducted by a licensed electrician in Australia.

  • Warranty Claim Application:

    • A warranty claim application must be lodged before replacing the unit. The application should include detailed documentation and evidence of the issue (e.g., photos, error logs).

  • Replacement Unit Provision:

    • The replacement unit should be provided by Growatt New Energy Australia Pty Ltd. The replacement process should follow their guidelines and procedures.

  • Confirmation Before Application:

    • Confirmation must be granted by Growatt New Energy Australia Pty Ltd before lodging the warranty claim application. Ensure all steps for diagnosis and troubleshooting are followed as per Growatt's guidelines.

  • Safety Compliance:

    • All work must comply with Australian safety standards and regulations. Proper safety measures must be taken during the diagnosis, repair, and replacement process.

  • Documentation and Evidence:

    • Keep detailed records of all measurements, tests, and actions taken during the troubleshooting process. This includes voltage readings, error codes, firmware versions, and any communications with Growatt's support team.

  • Professional Conduct:

    • The licensed electrician must follow professional conduct standards, ensuring no damage to the system or property. All work must be done with care to avoid voiding the warranty.

  • Post-Replacement Testing:

    • After replacing the inverter, perform comprehensive testing to ensure the new unit is functioning correctly. Document the results and report them to Growatt New Energy Australia Pty Ltd.

  • Customer Communication:

    • Keep the customer informed throughout the process. Provide clear explanations of the issue, the steps being taken, and any necessary actions they need to follow.

  • Follow-up Support:

    • Offer follow-up support to the customer to ensure the problem is fully resolved and the system is operating normally. Provide contact information for any future issues or questions.

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