I search in the community but didn't get the correct answer.
Main Point is to activate an electrical heater for the Boiler so store the sun power into water.
I found some "leading edge dimmer / 3-phase thyristor" like this: https://www.pohltechnik.com/de/thyristorsteller-3x-phasenanschnitt
Just some Thyristor for 3 phase system to fade electrical power from 0 to 100% with 0kw to 9kW for example.
Does the multiplus recognize this load also at 50% or 10% for example and try to hold the grid-feed-in at 0W?
How do the multiplus measure the AC-current? Because the current is with the Thyristor only at a short part of the sinus, or does the multiplus calculate some average?
If the multiplus recognize this, it will be really cheap to fade the load from 0 to 100%. Dont't need fronius ohm pilot and so on!
Thank you!