Setting circuit max power via mqtt

[J1Buskens]

I use the circuit max power option to set the maximum power that is take from the grid, not due to my circuits actual max power limit, but rather because in Belgium you pay for your highest power peak each month. Therefor, my max power changes sometimes. Can we add an option to set the circuit max power value using mqtt?

[JanVanr]

I tried something similar: my Home Assistant keeps track of my max peak of the month.
If I manually enter that peak in evcc the system works great keeping my max power below that value.
It would indeed be super if that value could update automatically when a higher month peak was encountered in my home. (as I will get taxed for that higher peak for the month anyhow)

[RenatusRo]

I added this discussion to the Load management enhancements back log comments
#14261 (comment)
so it won't be lost ...

[RenatusRo]

You may join me in thanking @andig for instantly adding this nice enhancement: #16809

configuring the circuit like

circuits:
  - name: main
    maxPower: 6500
    GetMaxPower: 
      source: mqtt
      topic: sim/circuit/maxpower
    meter: grid
    parent:

will do the magic.
(GetMaxCurrent: works as well)

[JanVanr]

This does indeed work! Thanks @andig !
I can confirm it also works with http as source for getting the info out of Home Assistant.