I have already installed a Feller rotary dimmer. Can I install the Shelly Dimmer 2 there afterwards and then switch it both by rotary dimmer and by app? Is the voltage set in the rotary dimmer "looped" through the Shelly or does the Shelly then have its own brightness? Thank you very much!

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Answer

No, that's not possible.

The "stupid" Feller dimmer and the Shelly dimmer do not communicate with each other. That is why a combination of both devices is not possible. Either no Shelly dimmer or you have to remove the Feller dimmer.

If the Shelly dimmer is used, it is the only device that is allowed to influence the voltage in terms of dimming for the corresponding lamp(s).

https://shelly.cloud/knowledge-base/devices/shelly-dimmer-2/
https://shelly.cloud/documents/user_guide/shelly_dimmer_2_multi_language.pdf

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Question about Shelly dimmer 2

I have already installed a Feller rotary dimmer. Can I install the Shelly Dimmer 2 there afterwards and then switch it both by rotary dimmer and by app? Is the voltage set in the rotary dimmer "looped" through the Shelly or does the Shelly then have its own brightness? Thank you very much!