Wiring BMS CL 12/100 with Orion XS 12/12-50A DC-DC battery charger and Lithium Battery Smart 12,8V

Q&A and troubleshooting
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1

Hello everyone,

I have the following three main components:

  • Orion XS 12/12-50A DC-DC battery charger
  • BMS CL 12/100
  • Lithium Battery Smart 12,8V

The only output is a 12V fusebox linked to some small equipment: lights, tap/pump, sockets, fridge. The current wiring looks like this:

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I have been struggling understanding the way I should wire these three main components. Below is my current understanding of how it should be wired.

Orion XS

  • In = linked to + from alternator/started battery
  • Out = linked to BMS “Alternator / start battery”?
  • GND = to ground/chassis

BMS CL 12/100

  • BMS cables x2 = linked to battery
  • Alternator / start battery = linked to DCDC?
  • LI-ION+ = linked to fuse box?

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Battery

  • Positive = linked to LI-ION+??
  • Negative = to ground/chassis
  • BMS cables x2 = linked to BMS

Is this correct?

Looking forward receiving your view!

Tanks in advance.

2

Normally you would not have an Orion XS and a BMS CL 12/100 at the same time because you are putting 2 alternator controllers in series with each other. You could put a 125A fuse in the BMS so that it did not provide any regulation as the Orion would limit to 50A max. I am still not 100% sure if they would work together or not. Normally you connect direct from your starter battery to the BMS alternator terminal. If your alternator voltage is too low the BMS does not charge as well so the Orion will boost the voltage.

Your connection scheme will work, put a 125A fuse in the BMS, but I can not guarantee perfect charge control.

As you have an Orion XS, consider another alternative.

Orion XS

  • In = linked to + from alternator/started battery

  • Out = linked battery+

  • GND = to ground/chassis

  • Remote terminal connected to BMS ATC

BMS CL 12/100

  • BMS cables x2 = linked to battery

  • Alternator / start battery = not connected

  • LI-ION+ = linked to fuse box

  • BMS ATC connected to Orion remote terminal

Battery

  • Positive = linked to LI-ION+ and Orion+

  • Negative = to ground/chassis

  • BMS cables x2 = linked to BMS

In this case, the BMS is only providing safety control, no alternator charge control. All charge control is by the Orion. For safety the ATC on the BMS must shut down the Orion so needs wiring to the remote terminals. I do not know exactly how to do this, you may need a remote inverting or non inverting on/off cable, look in the Orion or BMS manuals.

3

Thank you very much! I’m going to give a shot to one of these!

4

I have a similar installation with a dc to dc charger connected to the vehicle battery/alternator and then to a bms 12-100. The bms is connected to the lithium battery. The problem is that the bms remains off until the vehicle is started and the battery protect and inverter which is controlled by the bms only work when the engine is running.I tried wiring a power supply from the lithium battery to the input terminal of the bms ( through a diode) but it is still not working. It is a dumb idea from Victron to power the bms from the car battery and not from the lithium battery. My only solution is to disconnect the load controls from the bms and remove the battery protect units from the dc output.

5

Correction to my previous post: connecting the bms input terminal to the lithium battery does work and the installation is working with the engine switched off .

There is an additional wire (not shown) from the lynx distributer positive to the input terminal of the bms though a fuse and diode to provide power to the bms

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