Fronius Gradual Voltage Dependent Power Reduction Service Message
STATUS CODE 4 or 567 – what does it mean?
Firstly, your Fronius Inverter is doing exactly what it was design to do, the inverter is communicating to you that there it is doing something that it is unusual to every day production.

In this case it is telling you that there is a 4 or 567 or Gradual voltage dependent power reduction (GVDPR) has been activated. Essentially, the inverter is receiving a high AC voltage reading from the distribution network (grid). According to the Australian Standard (AS 60038-2012), the grid should be kept at 230V -6% / + 10%. So the highest it should get is 253V.

When inverters receive high AC voltage from the grid they usually turn themselves off until the grid returns to a normal level (not good!), however, Fronius inverters will continue to operate with reduced power output. This way the inverter will reduce the voltage rise (keeping the grid normal) and still power your home. This mode must be enabled by default in accordance with the new standard.

GVDPR and Solar Web
Using your solar web account, you can see the impact the GVDPR is having on your system. You will be able to see the solar feeding your home with some limited feed in to the grid. In extreme cases (below) it will look like the below flat line in others it may be difficult to see.


I hope this fact sheet assists you in understanding what this status code means for you and your solar system! If you do not want to receive any of these messages we can disable them, please let us know if you would like us to do this.

If you need any further information, please do not hesitate to contact National Renewable Group (NRG) on 1300 858 160.