Ve.Bus configuration on Cerbo GX MK2 for using several MultiPlus II in different configuration

[MMoeschter (MatzeM)]

Guten Tag Allerseits, ich habe ein Mieterspromprojekt in der Umsetzung in dem ich mit 7 Multiplus 6 Wohneinheiten und den Allgemeinstrom versorgen will. Der Allgemeinstrom soll auch als Einspeiseanlage in Deutschland angemeldet werden. Die 6 Wohnungen sollen als Nulleinspeiseanlagen konfiguriert werden.

Nach meinen und Chat GPT Recherchen lässt sich der VE.Bus in 2 Segmente aufteilen. Ist das Möglich und gibt es dazu ein Beispiel was einzustellen ist? Softwarestand MP2 ist aktuell V3.67, Cerbo ist auch aktuell.

Danke für eure Unterstützung

Hello everyone, I am implementing a project for tenants in which I want to supply 7 Multiplus 6 residential units and the common electricity. The common electricity is also to be registered as a feed-in system in Germany. The 6 apartments are to be configured as zero feed-in systems.According to my research and Chat GPT, the VE.Bus can be divided into 2 segments. Is this possible and is there an example of what needs to be set up? The software version MP2 is currently V3.67, Cerbo is also up to date.

Thanks for Help.

[lxonline (LX)]

No. That is incorrect.
For ESS to work it will have to be be a symmetrical design.
I am going to preface by saying that i don’t think you have the experience nor the training to handle this kind of set up, if these are questions being asked. (And chat gpt definitely lacks the experience in this as well.)

It is best to be in contact with a local authorised dealership for further design help and supply.

I am not totally familiar with German regulations/codes but have a few questions regarding set up as we have installed several systems similar to the one you are proposing.

Are the houses all singe phase fed and on different phases? Or are all the houses three phase?

It will be a three phase parallel set up (6 units or 9). How this is accomplished depends on what size inverters you are using.

If it is under 5kVa then you can parallel them. See the datasheets.
If over then you have to use the external transfer switch application.

[Meine_Energiewende (Jens Rehpöhler)]

Ganz klar : nein … das geht nicht. Du kannst zwar z.b. ein MK3 Interface anschließen und somit einen separaten VE.Bus erzeugen. Der daran angeschlossene Wechselrichter kann aber nur beschränkte Aufgaben ausführen (z.b. Ladegerät zur Anbindung eines Generators). Ein zweites ESS ist damit nicht möglich. Da hilft dann nur den MP2 GX zu kaufen.

Viele Grüße

Jens

[MMoeschter (MatzeM)]

@lxonline

Hello, as you can see in the setup “singe phase fed” per flat, 6 flats are in the house. The first ve.bus segement for supply of the common electricity is allready running and yes I feel capable of designing such a setup.

The question remains: what is needed to get the data from the 6 apartment converters into the VRM? Thanks to Jens, I understand that a new bus line can be opened via the MK3 interface or a separate MP2 GX(first device other 5 normal once). The first would then be the bus master and the other five slaves would implement a zero feed on the corresponding phases. This can be set up easily via the VE-Bus system configuration, so I have no concerns there.

Can the 6 MP2 devices be operated without receiving information about the MPPT charge controller or the Pylyontec battery?

kind regards

Mathias