SOC not showing on a Victron/Pylon battery setup

Q&A and troubleshooting
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1

Hi all,

I have a system that consists of one 15kW Quattro, three Smart solar MPPTs 250/100, one Cerbo plus 15 X US5000 Pylons.

Before we added the last five US5000, the SOC showed as a percentage on the VRM. After adding the extra five batteries, the SOC has disappeared.

I have changed the cable connecting the battery to the Cerbo, made sure it is the correct way around. Changed the Cerbo for a new one, makes no difference.

The VRM recognises the Pylons on the VRM under battery but does not show the battery under devices. The Cerbo show under the Gateway but not on the device list. I am not sure it ever did.

I set the battery monitor to automatic hoping it would pick up the Pylons but it chooses the Quattro as only option showing.

This system runs totally off grid so the SOC is important worked before so I am baffled as to why it does not work now.

Any ideas would be very much appreciated.

VRM 1
VRM 11160×502 51 KB

VRM 2
VRM 2969×334 34.3 KB

VRM 3
VRM 3935×530 52.2 KB

VRM 4
VRM 41187×339 40.4 KB

VRM 5
VRM 51176×406 49.6 KB

2

If you’re not seeing the Pylontech under Settings > Devices, that must be the problem.

What do you have set in Settings > Connectivity > VE.Can port > CAN-bus profile?

Also, have you made one of the new batteries the master?

3

In addition to @Chris78 commenets can you provide a photo of the daisy chain stacks, I added two new ones to my stack and wondered why I wasn’t seeing SOC because the A/CAN wasn’t connected ie it was in the B/RS485 port it was dark and late I’m stinking to that excuse

4

Hi Chris,

Can-Bus profile is so:

VRM 6
VRM 61104×454 49 KB

I have tried making one of the new batteries to Master, also one Pylon engineer told me to set all dip switches to zero, contrary to the manual.

@Daza A/Can is connected one the first in the stack, and outgoing plugged into the LinkPort 1 and daisy chained to Linkport 0 to the next battery and so on. The last battery is connected via Linkport 0 and has a terminator in Linkport 1.

Thanks for you input, guys.

5

Nowhere in the manual of the Pylontech it says something about a terminator, remove that.

How many batteries do you have now?

With up to 16 batteries you don’t need to change the DIP switches.

6

Correct all dip switches to zero and as @M_Lange no terminators needed

16 batteries is the max just checked the manual any more and your going to need the LV Hub by the looks of it

IMG_6023
IMG_60231920×2560 194 KB

image
image1920×2560 274 KB

Can you see how many modules reported?

IMG_6024
IMG_60241284×2778 213 KB

7

Hi Matthias,

we have 15 batteries in total.

I can remove the terminator, but it did not work before I put in in.

@Daza My problem is that that the battery is not showing up in Devices at all. Although under Batteries, the system acknowledges the Pylontech battery.

Thanks for your replies, much appreciated.

Terry

8

Please add some pictures of your system and the wiring.

9

Have you got terminator in the GX next to the VE.CAN? And yes as please photo like @M_Lange suggested. as fault finding I would start with a stack of 4 or 5 depends how they are stacked and only turn on a stack see if it registers then off and connected them one at a time till you find the issue or the culprit

10

@M_Lange @Daza ,

Next time I am on site, I will take photos off the system and post them. @Daza , yes I have a terminator in the GX.

I shall try the single stack fault finding and keep you updated.

Meanwhile your help is very much appreciated.

Thanks.

11

Update to my problem.

I took all the comms cables off the system, and rewired them. SOC suddenly showed after a system restart.

Not sure why but happy it works anyway.

Pylons work in mysterious ways.

12

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