Fronius username password

[BrettLHolmes]

openHAB 5.03
Raspberry Pi 5 8GB Ram

Fronius Primo 6 Software version 1.39.5-1

The other Topic for this was solved so thought i would start a new one

I am having an issue with authentication to a Fronius 6

I get this error - I am using the same password as used by the App (not app password) and i have ensured it has been changed on the Bridge as well

Can anybody advise how to trouble shoot further.

2026-01-28 14:28:01.210 [DEBUG] [s.internal.api.FroniusConfigAuthUtil] - Sending login request to get authentication challenge ...
2026-01-28 14:28:01.213 [DEBUG] [s.internal.api.FroniusConfigAuthUtil] - Got login response. Parsing authentication challenge ...
2026-01-28 14:28:01.213 [DEBUG] [s.internal.api.FroniusConfigAuthUtil] - Got authentication challenge.
2026-01-28 14:28:01.215 [DEBUG] [s.internal.api.FroniusConfigAuthUtil] - Logging in ...
2026-01-28 14:28:01.219 [WARN ] [al.action.FroniusSymoInverterActions] - Failed to execute battery control action: Invalid username or password

[sihui]

@BrettLHolmes

issue with authentication

@BrettLHolmes

I am using the same password as used by the App

For your interverter you will need the customer password for local control, not the web api (solarweb) password nor the app password for your wattpilot.

There were recent changes in the Fronius api regarding authentication, most probably you will also need to change your inverter customer password, then disable the Thing and reenable it.
After that you may change the password back to the old one if preferred.

Fronius Binding: "Invalid username or password" after firmware update?

I have now created [fronius] Fix config API authentication for firmware >= 1.38.6 by florian-h05 · Pull Request #19344 · openhab/openhab-addons · GitHub to address the changes and fix support. It keeps backwards compatibility by selecting the appropiate hashing algo based on the firmware version. I will make sure this gets backported to 5.0.x, and best even for 4.3.x.

Fronius Binding: "Invalid username or password" after firmware update?

Okay, I found a solution, at least for my setup: login to local ip of the inverter change customer password add new password to Fronius bridge Thing disable/enable inverter Thing Thing actions are working Even changing back to the old password is possible, all good now, thanks

[BrettLHolmes]

Hi @sihui thanks I have changed the Customer password - I put the new password in and restarted the Bridge and the thing still get the same - is there any way to test the authentication

[BrettLHolmes]

@sihui and I have logged in via the web page with that username/password pair and it works (HTTP as well NOT HTTPS)

[sihui]

@BrettLHolmes

restarted the Bridge

I think you need to restart the inverter Thing.

[BrettLHolmes]

Hi @sihui

thank you for responding. Turns out that there were two issues

1. The password (hash/update needed) and needing to change in on the inverter and restart the inverter Thing (not just the Inverter Bridge

2. the use interface in the app shows the user name as “Customer”: with a capital C but turns out i believe its actually “customer” with a lower case “c”