[Bug] `Failed to perform the action switch/turn_on. Error writing register: Error writing register at address` when enabling `Remote EMS Dispatch`

[reedy]

Integration version

1.1.9

Describe the bug

Trying to enable Remote EMS Dispatch as per #73 (comment)

Failed to perform the action switch/turn_on. Error writing register: Error writing register at address 41500: ExceptionResponse(dev_id=1, function_code=134, exception_code=2)

Logs

home-assistant_sigen_2025-09-24T19-46-54.988Z.log

Diagnostics file

config_entry-sigen-01K5XQWT25ZJBZFNW21AMCZ4FC.json

Checklist

• I searched existing issues and discussions.
• I attached logs and/or diagnostics.
• This is not a support request; it describes a reproducible bug.

[reedy]

I seem to be able to put the inverter in Remote EMS Mode via the app, and then when the new controls come up... I seem to be able to control things.

Remote EMS Dispatch still shows as being Off in HA. But "Remote EMS (Controled by Home Assistant)" is on, and I seem to be able to then set the system back into self consumption mode..

[TypQxQ]

Sorry, can't help with the 41500, Remote EMS Dispatch. I don't control my Sigenergy through another provider and I don't think it's intended to be turned on/off by end user. Might actually hurt the system.