Entity has no relation to a switch, number, light, etc

Configuration
1

I have an entity that I can control using Developer Tools.
This entity has no relation to a switch, number, light, or whatever.
With this entity I can send a value to my solar panel installation.
I want to create an automation that can control this entity, but I don’t know how to do this.

What I have is below:

value: <between 10 - 100>
entity_id: set_power.<panel_ID>

As I said, if I enter this directly in Developer Tools it works.

Can someone help me with this?

2

You can’t do that with a made-up entity domain, there’s no automation service to set that.

Where did that come from, and how did it come to send values to your solar installation?

Can values be sent to your solar installation through a different entity, like a helper?

3

Thanks for your answer.
I tried all the helpers, but none of the helpers could help me.
In the meantime, I contacted the developer of the integration and asked him for a solution.