Multiplus 12/1200/50 parallel configuration rj-45 splitter

Q&A and troubleshooting
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1

Hello,

I’m brand new here. My apologies for redundancy and all other worldly issues.

I’m trying to configure two 12/1200/50 inverters in parallel for single phase 120v.

For ve.bus configuration, how are you supposed to route the cat5 cables with only one port on each inverter? The software shows in-and-out, the manual for this product shows in-and-out, and the forums say in-and-out… but that’s not possible.

My mk3 ve.bus (also one rj45 jack) to usb will communicate with each inverter individually, but if you work through the parallel ve.bus configure steps to >>turn on master, >>turn on slave… putting an rj-45 splitter in the mix makes nothing detectable.

Is the victron splitter proprietary?

Thank you, GB

2

for additional clarification,

I can run and change settings in VE configure when connected directly with the mk3 to one inverter. This applies to both inverters and their respective patch cables.

I can establish communication in VE.bus quick configure for a parallel 120v single-phase setup up to the point where I am to turn on the second/slave inverter, only if I am still directly connected to one inverter. It all falls apart if I try to connect the second inverter.

If I try to run VE.bus quick configure or VE configure with a generic RJ-45 splitter (I tried with multiple splitters), I am unable to detect any inverter. This is regardless of if only one inverter is plugged in to start, or both are plugged in.

The diagram sticker on the actual victron splitter available on their products page depicts generic splitter wiring, but is there another reason it would work where a generic RJ-45 splitter doesn’t?

3

What splitters did you try?

Most ones split the 8 pin IN to 2x 4pin OUT.

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You need one that splits all 8 pins.

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4

That’s very useful information, Matthias. Thank you!

5

This should be the right.

6

I was able to confirm that the splitters I was using were not splitting all 8 pins. I’m not even sure it was splitting 8-4-4. :sweat_smile:

I bought a victron brand splitter, which has a week lead time. I will update the thread with any progress after it arrives.

7

Early Update!

The victron splitter came earlier than expected and was the direct solution for my issue. Don’t use generic splitters!

VE.bus configure worked seamlessly to parallel my two 12/1200/50 charger inverters. From plugging in to configuration completion took about a minute.

Output worked well on the cerbo gx as well.

Thanks again, Matthias.