Hmm, yes. I’ve overread it. So it is the same as with the MultiPlus 800 without C.
The multiplus itself looks like is allready prepared to proceed the NS protection. As understood only the second relay is missing. If this is the cause it is possible that the Multiplus/Cerbo/energymeter kombination with an additional relay (german Installationsschütz) with a additional helping switch attached could give all the needed parts to get the certificate. The MultiPlus itself should switch on and off the addional relay and the cerbo should register with the energy meter that after a power failure the energy is back on wire.
Or is there another cheap way to add an external NS Protection only for the Victron MultiPlus 800 especially for a 1 phase connection, best in one device? All devices I found are for 3 phase. I found a finder device which looks like can detect over/undervoltage also frequency shifts. Also phase shifts could registered so it could be possible to disconnect the MultiPlus with adittional relais if a PowerFailure and other issues are detected. But it is not the same as a as NS Protection declared device. Does anybody knows a cheap 1 phase ns protection they is welcome to inform me.
But I mean the easiest way is Victron builds a limited MultiPlus II to 800 W for easy creating a Balkonkraftwerk. By the way how get I Victron to make it?