Sunna inverter

We service and repair Sunna inverters!

Does your Sunna inverter need fixing or servicing? Call Solargain for professional advice and quality repairs, and to get your solar power system up and running again fast.


Sunna models we service


  • Sunna 1500TL
  • Sunna 2000TL
  • Sunna 3000TL
  • Sunna 4000TL
  • Sunna 5000TL

Your inverter isn’t on this list? Contact us to find out what support we can provide.

Known issues with Sunna inverters

An Er22 fault indicates a relay failure. We recommend that you replace your inverter.

If the inverter is dead, it might still be repairable. Without any fault information, there is no way of knowing where the issue comes from. However, if you get one of our solar technicians to come to your property and inspect your unit, we’ll be able to either repair it or replace it.

Fault codes Er11, AL00, AL01, AL02 and AL03 suggest the alternative current is outside the inverter’s acceptable range (eg. your grid voltage). Some meters allow you to verify the voltage by scrolling down your power meter screen until you see a “U” appear on the left hand side. Showing on the right hand side, your voltage should be less than or equal to 255V. If it is a permanent fault, there might be damage to the internal fuse or AC board.

The Er10 error message means that the inverter is overheating due to a high ambient temperature. The manual recommends moving the inverter to a cooler place.

Errors AL08 and AL13 reflect utility issues. Start by checking your solar supply switch, which is generally found in the main switchboard or sub-board. If the switch is on, the issue could come from one of your isolators. If it is off, it may imply a damaged internal fuse or AC board. These faults can also reveal a surge, so they might have been caused by a storm or blackout. With certain home insurance policies, this is even claimable. Solargain can help you check if you are eligible, and write a statement for your insurance company, as part of our inverter health check.

Isolation Fault AL11 can signify that water infiltrated the top box or another part in the installation. If your screen shows this error, you should book a health check with a provision for a replacement.

Sunna inverter repair process

Unlike many other solar companies, Solargain has been around for over 10 years, so we have a solid knowledge of Sunna inverters even though the company has been placed into receivership several years ago. In addition, all our electricians are accredited by the Clean Energy Council, and Solargain was granted the ISO 9001 certification, proving its processes meet international quality and safety standards.

Our Sunna inverter service procedure is easy as 1-2-3:

  1. Visit your property and check your inverter.
  2. Source replacement parts and repair the faulty unit.
  3. Recommend a new inverter if yours is not repairable or if it works out cheaper.

Our high-quality standards coupled with our understanding of Sunna products enable us to provide great, fast inverter repairs and servicing at reasonable prices.

Claiming warranty on Sunna inverters

Sunna inverters originally came with a five-year warranty. However, since the company has gone out of business, there has been no support of their products.

Solargain offers solar health assessments: if your unit is repairable, it will be fixed during this site visit and, if it isn’t, you will be offered replacement options in order to get you up and running on the day.

About Solargain

Solargain is an Australian solar energy company, which provides superior, yet inexpensive, solar power installation and repair services to residential and commercial clients nationwide. With many branches and franchises all across the country, Solargain offers support to the entire Australian solar community.

Contact us

Contact Solargain on 1300 73 93 55 to have a chat to our service team about your Sunna inverter repair needs or fill out the form below.

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