Hi There,
I have a very loud cycling humming sound with my MP2-5000. This is because of the NA-Protection (frequency shift=. After switching the internal NA off, the MP is quiet.
After searching for an external NA Protection I found this Item from enphase iq-relay-1p-datenblatt (enphase.com)
It is originally designed to work with their micro inverters, but the technical specs look like that it might also work as NA protection for the MP2-5000. It has VDE-AR-N 4105:2018-11 and a maximum switching power of 4.8kVA.
Any thoughts about this?
(of course, I could grab a Ziehl Device, but it costs more than 5x of this enphase device!)
