Connecting Orion XS to Smart BMS 12/200

DIY
, ,
1

In my Fiat Ducato I installed a Multiplus, a Smart Battery and the Smart BMS 12/200. Works well, the only problem is that the alternator is charging the Smart Battery only with 10 to 20A. Therefore I bought the new Orion XS DC-DC-converter. Is it possible to connect the Orion to the alternator-side of the Smart BMS 12/200? Or is it better when I connect the Orion directly to the Smart Battery?

2

You could connect it directly to the battery, but then the ATC (allow to charge) contact on the BMS would need to connect to the remote port on the Orion to stop it charging if there was a problem. The manual shows an MPPT in this configuration.

https://www.victronenergy.com/media/pg/Smart_BMS_12-200/en/installation-and-configuration.html

3

Ok, but it would be easier in my setting to connect the Orion to the alternator-port of the Smart BMS. Does that work as well?

4

I do not know if anyone has done this. You would need to make the fuse larger than the Orion and set the Orion to maybe 14.4V rather than 14.2V to compensate for the extra resistance of the BMS, you would need trial and error here. If the BMS stops charging the Orion output will be stopped but it might spike in voltage for a second or two. It should work

5

Ok thanks. The Orion is charging with a maximum of 50A, so a 60A fuse should be fine, is that right?

6

Yes, that should be OK.

7

Thank you!

8

I´d like to step in, because I have kind of the same question, but do have schematic views of my campervan´s installation.
I installed my electric in the van something like this:
VICTRON_Schaltplan_1.6KVA-12V-MultiPlus-230-Volt-system-example-4-PIN-VE-Bus-BMS-Lithium-Orion-Tr.pdf (1.0 MB)

For some reason the charge disconnect is not working properly (anymore). It worked, but stopped, I don´t have a clue why. Narrowing down the problem it could be the Cyrix OR the BMS.
I would like to update the system with a new Smart BMS 12/200.
Therefore I updated the schematic like this:

CCV_ElektrikDiagramm_UpdateNewBMS.pdf (1002.4 KB)

My question is: Can I leave the Orion like this or do I have to connect the positive Out with the left side (Alternator) of the new BMS?

And: the new Smart BMS has no VE-Bus Connection. Is this a problem?

Sorry for the nooby questions, but I am stuck and need some help with this rather complex installation…

…thanks in advance, Daniel