Fronius inverters

Fronius commenced operation in 1945 as a family business in Austria, producing welding transmitters and battery chargers. Since then, they have grown into a global enterprise. In 1995, they added solar inverters to their suite of premium products. Fronius inverters are warrantied for a minimum of five years, but can be up to twenty years depending on the original installer.

The Fronius range includes the following models (the first two are no longer produced but many are still in service):

  • Fronius IG
  • Fronius IG Plus
  • Fronius Galvo
  • Fronius Primo
  • Fronius Symo

Our experience of Fronius is that they produce exceptionally reliable inverters. We rarely see a faulty Fronius inverter. In the unlikely event of a fault, contact us for assistance.

Fault codes

State 104, 302 or 443 – these codes may indicate a faulty circuit board

State 4657 or 461 – these codes may be resolved with a simple software update

Other codes or even a blank screen are also possible.

Solar PV repair enquiry form

Complete the fields below as fully as possible and this interactive tool may provide an instant diagnosis. The more information you provide, the more effective it is.

If you know you require a visit from a service technician then please be aware that we are in Lancashire and can only travel within Lancashire and neighbouring counties.
Please note that we are a small company and can only offer a call out service within a reasonable travelling time from Chorley, Lancashire. We can send spare parts and replacement inverters via courier anywhere within the UK.
e.g. Are there any fault codes or messages on the inverter screen? Any unusual noises or smells?
If your inverter is at fault then we will definitely need to know what panels are connected to it. Many companies installed a poor choice of inverter the first time round. If we know what your panels are then we can get you the right one.
Please select an option. If not known then please choose 'Unknown'. If not listed please choose 'Other'
Your inverter model number and serial number can usually be found on a label on the side or underside of your inverter.
If it's around 5 years, is it over or under? This is important as most inverter warranties are 5 years.
Why do we ask this? Certain companies made consistently the same mistakes/short cuts with their installations and this often gives us a clue as to what might be wrong.
A picture speaks a thousand words! If you have any photos or other documents that can help us understand your installation then please upload them here. Particularly useful are photos of the inverter model number sticker, the connections into the inverter and an overall picture of the inverter area showing all isolators etc.
I acknowledge that RED Electrical normally offers call-out services within Lancashire and neighbouring counties only and further distances are discretionary.

I understand that the standard fee for a local site visit for diagnosis or repair services is £90 inc VAT.