Told the housekeeper to just carry on during loadshedding, let’s see what happens…
The Fronius does not like an iron toggling on and off, that much is true. Took its ball and went home.
Adding the 2kW geyser actually helps, since then it doesn’t overshoot and turn off every cycle. Weird.
Edit: Actually wasn’t the iron… The DVCC setting “Limit Charge Current” was limiting it via grid frequency. Lots of talk in the manual regarding AC-in, but seems to apply to AC-out as well. Too bad.
@plonkster, is this a bug?