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mrsteve avatar image
mrsteve asked

Smart BMS 12/200 to Multiplus 12/2000 for camper system

Hello,


I would like to get some feedback of the schematic i made for a small camper system.

The Smart BMS 12/200 looks like a nice "all in one" solution for alternator charging and BMS.

I used 80A fuses on the alternator side for a 60-70A charge..

The smaller DC loads and MPPT wil be connected to the System +, the Multiplus 12/2000 will be

on the battery side and disconnected in case of BMS alarm with the special cable:

https://www.victronenergy.com/cables/cable-for-smart-bms-cl-12-100-multiplus


I have read a lot of info here (not much info available for the Smart BMS 12/200) and seen webinars on alternator charging.. i think this setup should work fine.

A couple of questions:

1. If the "special" cable is connect from BMS to the remote port in Multiplus do i need to program

something extra in the Multiplus to make Charge or Discharge disconnect work?

2. Does the Smart BMS 12/200 work with all alternators? I have read Euro 6 with smart alternators

have a to low voltage to let the BMS charge full amp output say a 60-70A?

3. Some may say i need a (more expensive) BuckBoost DC/DC 50A, but i can't see the point in this if i can use the Smart BMS 12/200 as a "all in one" unit for this small installation?

Why would a BuckBoost be much better?

4. Could you guys check my drawing below for errors i may have made in this design.


Thanks much for your time and answers!

Steve



vanlifesystem20.png
MultiPlus Quattro Inverter ChargerLithium BatteryBMSalternator
vanlifesystem20.png (2.2 MiB)
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out-to-sea avatar image out-to-sea commented ·
Were you able to figure out how to connect the load and charge disconnect cable from the Smart Bms 12/200 to the 12/2000?

I have been struggling mightily with this question.

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greg-2 avatar image greg-2 out-to-sea commented ·

You need the https://www.victronenergy.com/cables/cable-for-smart-bms-cl-12-100-multiplus cable. I am assuming the 12/100 disconnect will work the same as the 12/200 as the connectors all look identical.

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Neo Nos avatar image Neo Nos commented ·
Why is the MultiPlus not connected to the System + Terminal on the BMS? Does your usage go beyond the AMP rating of the BMS? I am currently setting up a very similar system for my van and I was thinking to use the battery protect feature of the BMS I would put it on the System +. Any advice would be appreciated.
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Matthias Lange - DE avatar image Matthias Lange - DE ♦ Neo Nos commented ·
That BMS works similar to the BatteryProtect and because of that I would not recommend to connect a big inverter to it.

The manual shows it like that but I would not recommend it.


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Neo Nos avatar image Neo Nos Matthias Lange - DE ♦ commented ·

Thank you. Do you then recommend I get the "Cable for Smart BMS CL 12/100 to MultiPlus" or something? Do I need a battery protect sperate for Multiplus then or it is built in?

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Neo Nos avatar image Neo Nos Matthias Lange - DE ♦ commented ·
But then if I connect the MultiPlus to shore how will it charge the battery? Charge without respect to the BMS? I thought any current comming into the battery must go through Battery Management System.
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himmo avatar image
himmo answered ·

Did you get it up and running? Connecting with the Remote Switch on the Multiplus is not working

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