Fronius Wattpilot Flex (22 kW) disconnects after several minutes

[HardiUndSo]

Describe the bug

Hi,

I can connect my fronius wattpilot flex to EVCC, but after several minutes it disconnects. After the disconnect I can see the status in the wattpilot app "not connected".

The charger is in another vlan than my server, but I've set all firewall rules.

Steps to reproduce

Try to connect the Wattpilot Flex to OCPP and wait several minutes.

Configuration details

network:
  schema: http
  host: evcc.local # .local suffix announces the hostname on MDNS
  port: 7070

log: debug
levels:
  cache: error

# unique installation id
plant: XXX

interval: 30s # control cycle interval

sponsortoken: XXX

# sponsors can set telemetry: true to enable anonymous data aggregation
# see https://github.com/evcc-io/evcc/discussions/4554
telemetry: false

meters:
- type: template
  template: fronius-vertoplus
  usage: grid
  host: 10.10.3.92
  port: 502
  name: grid1
- type: template
  template: fronius-vertoplus
  usage: pv
  host: 10.10.3.92
  port: 502
  name: pv2
- type: template
  template: fronius-vertoplus
  usage: battery
  host: 10.10.3.92
  port: 502
  name: battery3

chargers:
- type: template
  template: ocpp-goe
  stationid: XXX
  name: wallbox4

loadpoints:
- title: Einfahrt
  charger: wallbox4
  mode: off

site:
  title: Mein Zuhause
  meters:
    grid: grid1
    pv:
    - pv2
    battery:
    - battery3

Log details

[lp-1  ] ERROR 2025/11/10 16:05:56 charge voltages: timeout

[lp-1  ] ERROR 2025/11/10 16:05:56 charge total import: timeout

[lp-1  ] ERROR 2025/11/10 16:05:56 charger status: timeout

[site  ] DEBUG 2025/11/10 16:06:08 ----

What type of operating system or environment does evcc run on?

Docker container

External automation

• I have made sure that no external automation like HomeAssistant or Node-RED is active or accessing any of the mentioned devices when this issue occurs.

Nightly build

• I have verified that the issue is reproducible with the latest nightly build

Version

0.209.7

[andig]

but after several minutes it disconnects

Open ticket with Fronius...