Delta E09 No Grid Error on a RPI Home Solar Inverter

Delta E09 No Grid Error on RPI Home Solar InverterThe Delta E09 no grid error message on a RPI home solar inverter means that your inverter is not detecting any power from the grid and requires your attention as soon as possible.

There are typically two clear signs you have this fault. On the inverter the:

  • Red “Alarm”light will be flashing & the
  • Screen will display an “E09: No Grid” message

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What Does the Delta E09 No Grid Error on RPI Inverter mean?

The Delta E09 no grid message on a RPI home solar inverter indicates the inverter is not detecting any power from the electricity grid.

There are a few things you can check right away that might fix the error message:

  1. Make sure your Solar Supply Main Switch in the switchboard is set to ON (usually the up position). If your inverter is not located near your meter box it should have an AC isolator installed next to it, make sure that this is also in the ON position
  2. Confirm you are not experiencing a blackout at the time, as if you are this E09 message is normal
  3. Make sure the AC plug is firmly plugged into the inverter

If you have tried the above, and your inverter is still showing the E09 no grid message, you should contact a solar accredited electrician as further testing of your inverter will be required.

Get help with your A29 Relay Open message from Gold Coast Solar Power Solutions by filling out this solar inverter help form

What To Do About an Delta E09 No Grid Error on RPI Inverter

The Delta E09 error may be attributed to an issue with the circuit breaker, a cabling issue, or even damage within the inverter. An accredited solar electrician will need to attend your property to test the AC components and your inverter to ascertain the cause of the error.

If your inverter ends up being the problem then it may be covered under the manufacturers’ warranty. Delta RPI Home inverters are covered by a 5-year manufacturer warranty so if it’s still within this period you can make a claim. A warranty claim must be submitted to Delta for a replacement inverter.

Delta require the following when submitting a warranty claim:

  1. Model Number (such as RPI 5 kW)
  2. Serial Number (which should be visible on the side of the inverter)
  3. Proof of purchase (this can be your Tax Invoice, STC Form or paperwork showing the installation date and inverter)

If your inverter is over 5 years old, and therefore not under warranty, you will need to contact a solar accredited electrician to discuss replacing the inverter as soon as possible.

If you are in South East QLD, somewhere near the Gold Coast or Brisbane area, and require further assistance please complete the form above under the URGENT heading so we can help you further.

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E09 No Grid Error on Delta RPI Home Solar Inverter
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