I have a Multiplus-II-48/5000/70. My solar panels are connected to the UPS side. I like my solar invertor to reduce output when batteries are full and grid is nog available to dump extra energy. So i use the "pc invertor support" assistent to change the Multiplus-II output freqency to signal to the solar-invertor to reduce power (frequency modulation).
The specifications for the solar-convertor are:
It starts reducing output power at 50.40 Hz. Output power will be reduced to zero at 50.72 Hz. Disconnect freqeuncy of solar-invertor is 52 Hz.
I have this problem: The multilplus raises the freqency to fast for the solar-invertor to react (or maybe it raises it to disconnect freqency immediately. Not sure because it goes very fast).
Result is that the soloar-invertor is switching off and on all the time.
The solar-invertor is a fox-ess. They Fox-Ess say that the "derating speed" of the solar-invertor is set to 20. They ask if they should make the threshold wider. But i do not exactly know what they mean by derating speed and threshold. Neither can i gave them any new values for these settings.
How to solve. Can anyone help?
