Generating wiring diagram for an existing system

DIY
, , , , ,
1

Hello everyone,

I’m looking for some help determining if the wiring diagram I came up with makes sense.

I bought a 5th wheel RV with an existing Victron solar system already installed. Unfortunately, the previous owner didn’t have a wiring diagram.

I tried to trace as many of the wires as I could. This is what I have so far. I believe this is a Split Phase system where L1 and L2 coming from the grid, each has its own Inverter.

Does what I have shown in the schematic make sense?

Redwood RV Solar wiring diagram 2
Redwood RV Solar wiring diagram 21920×1157 162 KB

There is one components that I’m not sure where it goes, the 24-12/70 DC-DC converter circled in blue in the lower left corner of the schematic. I believe it supplies the 12VDC side of the breaker panel, but I can’t trace the wires to see where they go.

Can anyone offer ideas of how this may be connected to the system? There are 3 cables attached to it. See pictures below.

My best guess is that the positive 18-32V input & the negative cable, come from the Lynx Distributor and the positive 10-15V output goes to the 12VDC side of the breaker panel, but I’m not sure. I only see one negative cable connected to the Converter, which I assume is coming from the Lynx Distributor. Shouldn’t there be a second negative cable going to the 12VDC side of the breaker panel as well? Could the negative cable for the 12VDC side of the breaker panel come directly from the Lynx Distributor?

IMG_20250718_201318558
IMG_20250718_2013185581920×2560 260 KB

IMG_20250815_161723506
IMG_20250815_1617235061600×1200 300 KB

Thank you.

2

Yes the negative comes from the lynx probably and is also your vehicle negative

3

I do see a black negative cable all by itself connected to the Lynx, without being paired with a positive red cable. I’ll see if I can trace it to see where it goes.

4

The single black cable is attached on the post circled in yellow. Does it make sense that this is the ground going to the 12DC side of the breaker panel?

image
image1920×1067 201 KB

5

Yeah, thats going to be the main ground conductor for the negative pole

6

Thank you Chrigu.

So, would this schematic make sense then?

Redwood RV Solar wiring diagram 3
Redwood RV Solar wiring diagram 31920×1292 186 KB

7

The full diagram may be a little confusing. I’m only asking about the connection of the DC/DC converter to the Lynx and the breaker panel.

image
image2626×1435 368 KB

8

where did you get these schematics from with all the Victron kit and the other ICON’s

I would love to do a similar graphical diagram for my installation and subsequent upgrades

thanks

9

At the bottom of all the product pages have high quality photos for download.
You can google search for the other stuff

10

With a bit of learning curve You could make something like that on LibreOffice Draw:

scania_darbs_8real.pdf (601.5 KB)

A bit of time to prepare the pictures and a bit of time to get used to “layers” concept, afterwards it’s nice.

11

I have the time and the desire to produce something like that although my system is very simple BUT where do I get the pictures of the Victron and other bits and pieces and I do have Libre Office mostly for the WP facilities

12

As @LX already said - there is Download section on each Victron product page, You will find high quality pictures as well as some sample diagrams.

Like the one for small MPPT’s .

For other products - their product pages or simply Google image search are Your friends.

I crop the size of image close to product and scale the result to have the longest side at approx 1200 - 1600 pixels.