Volt spikes 24v-39v

Q&A and troubleshooting
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1

I’ve been having massive problems with a victron retailer and his installer. For 5 months this system has been malfunctioning and he’s just ignoring me the problem waranty everything. I’m having to fix i system i know nothing about, thanks victron for having half my bus stolen by the installer half the parts missing when the bus handed back to me jeez no cerbo 2 panels not 3..blew the bus 12v didn’t seperate the neutrals in and out could camp charge for 4 months but as it’s all installed now fully and driving me nuts. Help please anyone.

gear as was new feb 11th

never worked

1 Cerbo Gx mk2

1 multiplus 2 mk3 venus 3000/24 something

1 otion tr isolated 24-12

1 12-12

150/70 mppt

3x 150ah 25.6v sok lifep04 batteries

3 475w latest panels.

We were getting 2 online 3 online batteries for 5 months

temp spikes to 158c

Voltage spikes to 40v

the multiplus low batt alarming and shutting off when restarted with half full battery bank..

2 am no load sound asleep it would just go mental spiing and offlining constantly for hours.

We swapped out all batteries

we swapped out ll cables multi[ple times terminators etc not cables or bad termination

we swapped out the Cerbo

still happened.

I noticed the isolator switch was loose checked it fell apart wired the pos straight to the lynx busbar positive..online off lines stopped.

spikes continue

read up could be one device is set to C another Fahrenheit set all to F. multimeter the batts not hot can’t see spikes on multimeter..false data

turned off orion by installing switch has jumper in it so always on. now off.

temps and voltages settled in all readings now barring “system battery voltages and current” widget. like it spikes constantly for hours every reading then stops or starts middle of night at times.. now it was quiet for 14 hours then 1 spike 40v co-inciding with a draw of 300w on the ac output however 276 and 512 didn’t see anything.. before 276b 512 voltage or widgets were going nuts it was like looking at an ociliscope reading a fm signal.

last thing to fix..you have no idea what i’m going through 12k of gear 4 k to install, and im here after 5 months still trying to finalize this install I paid a victron reseller authorized NZ agent to do!

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2

Appreciate that there will be big feels around the whole debacle.

Physical installation is a big one when voltage of the systen is lower. Seems like you started there.

It does sound like the batteries are tripping on and off.

Is this from 512?
Do the sok batteries have a can connection to the cerbo? I do now a couple brand s that send spurious information out.

And programming. I am assuming its a mobile one, Is it right for the batteries?

On the screenshot, the widget name/source is cut off is that the ve bus dc widget?

So the spike was recorded on the 276 (so ve bus) but not the 512 (battery comms)?

Basic set up?

flowchart LR
    %% Solar Input
    PV["☀️ Solar Array\n3× 475W Panels"]

    %% MPPT Charge Controller
    MPPT["⚡ MPPT 150/70"]

    %% Battery Bank
    BAT["🔋 Battery Bank\n3× SOK LiFePO4\27.6V Absorption"]

    %% Multiplus Inverter/Charger
    MP["🔌 Multiplus-II mk3 Venus\n3000VA / 24V\nInverter + Charger"]

    %% Cerbo GX
    CERBO[" Cerbo GX"]

    %% Orion TR Isolated (24V → 12V for sensitive loads)
    ORION_ISO["🔄 Orion-Tr Isolated\n24V → 12V\nSensitive / Isolated DC Loads"]

    %% Orion 12-12 (DC loads at 12V)
    ORION_DC["🔄 Orion 12-12\nDC-DC Converter\n12V DC Load Bus"]

    %% AC Output
    AC_LOADS["🏠 AC Loads\n230V AC"]

    %% Shore/Grid Power
    GRID["🔌 Shore / Grid Power\nAC Input"]

    %% DC Loads
    DC_LOADS_12["💡 12V DC Loads"]

    %% Connections
    PV -->|"PV Input (150V)"| MPPT
    MPPT -->|"24V Charge"| BAT
    BAT <-->|"24V DC Bus"| MP
    BAT -->|"24V DC"| ORION_ISO
    BAT -->|"24V DC"| CERBO
    MP -->|"AC Output"| AC_LOADS
    GRID -->|"AC Input"| MP
    ORION_ISO -->|"Isolated 12V"| ORION_DC
    ORION_DC -->|"12V Regulated"| DC_LOADS_12

    %% Cerbo monitoring connections (dashed)
    CERBO <-.->|"Comms"| MPPT
    CERBO <-.->|"VE.Bus"| MP
    CERBO <-.->|"Monitor"| BAT

    %% Styling
    classDef solar fill:#FFA500,stroke:#cc7700,color:#000
    classDef battery fill:#2e7d32,stroke:#1b5e20,color:#fff
    classDef victron fill:#003580,stroke:#002060,color:#fff
    classDef loads fill:#424242,stroke:#212121,color:#fff
    classDef grid fill:#6a1a8a,stroke:#4a0060,color:#fff
    classDef cerbo fill:#0077b6,stroke:#005a8a,color:#fff

    class PV solar
    class BAT battery
    class MPPT,MP,ORION_ISO,ORION_DC victron
    class AC_LOADS,DC_LOADS_12 loads
    class GRID grid
    class CERBO cerbo
3

No it’s started again all going off 512 276 and that one above didn’t have a number just said battfery voltage and current. 57f to 315 fon all sensors wtf 5 months voltage spies 40+ volts on a 24v system? i took it too SOK south island so he swapped data cables brand new self terminating batteries and swapped the gx.. mustn be the MP 2 MPPT 150/70? doing it?

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4

I don’t know if a person from Victron but if your main nz dealer dumps a client because as he said to me on 12k of components he only made a grand and he can’t be bothered with this.. but i’m ringing my lawyer this morning you …

5

I do not know how victrons structure works but they have a company in Auckland apacific? who sell to dealers authorized victron dealers in NZ, this outragous rude dealer is the main reseller in NZ i will not name that company who is the victron phone number for NZ, but the guy ndoing this has a masters in emectrical engineering is the holding companys main reseller agent in NZ. We have consumer laws, and there’s a special one reserved for dishonoring warantees walking away not supply good fit for purpose, addingn 20k in debt to the client by failure to remedy the problems 5 times and sending him off half way down the country for it to not work when he got to his destination at 400 dollars diesel a time, 3k in stolen gear, short changing the products by not fitting and installing the gx a panel as well. getting an italian guy to redo the install then telling me i have to talk to him now who set up as admin locked me out and flew off to italy the next day leavibg me totally fkd no contact.. Your agent.. my lawyer is going to get paid very very well.. my bus roof is collapsed, they even drilled holes in it and left them.. I’d PM me and get my phone number and remedy this.. I’m used to dealing with microstar, Acer, PC engineers top level guys..we do not treat clients like this. Nor are warrantee abandoned when the going gets tough. We do not tell client we didn’t earn enough and can’t be fkn bothered.. PM ME

6

The SOK is sending spurious temp readings - the 512 is the battery.

The system batteye voltage data widget is using the battery data again through DVCC.

It seems the entire issue is the SOK comms are not great, which aren’t on the official list as an FYI.

So ideally the issue is with SOK. The Victron system is only reporting what it has been told.

If you cant trust the temp readings you cant trust any of the data from the battery.
Arr the temp spikes co-inciding with the voltage spikes?

7

I’ve been with Brendon from Sogenenergy who has been amazing and we swapped all batteries out of boxes for brand new 150ah 25.6v self terminators..not batteries. We swapped out all leads bus port changes on devices blue terminatos several several times..not cables. We swapped the GX for one he had he resetup the cerbo and flashed and checked the multi nsettings he said it’s Victron and it’s proven..

8

Usually its the installer then seller and distributor then escalated to Victron.

But you can put it a something on the support page.

9

So the battery sending spurious temperature readings is a victron problem. Maybe explain the logic?

If the battery sends incorrect information, it is not an officially supported battery.

The components are programmed correctly? Usually a device only puts out what it is programmed to do.

Are there any widgets with all the dc voltges form all the components together? You can get the assistant on the widgets page to make one

10

Lx it’s been 5 months and a guy who the SOK main agent who sells batteries to resellers their top top guy looks at it do you not think when he says he’s proven it’s victron by hardware elimination and it works with same gear all over the planet he might be onto something..yes it’s doing it on all sensors the mp is reporting them the solar is reporting them the gx is reporting them, 276 512 i’ll try and get that page for you. I can send you the xmsl is you want..much better info.. you’ll love it.

11

Are the batteries daisy chained?
I saw an instance of a bank where they were and one unit was unhappy and kept bms tripping and causing an issue in the others (and the 12v system) and a current dumpt form other units making further issues.

12

yep we swapped master for other went stable for few ours and reverted again..bro for 5 months i’ve been blaming the batteries too it loos lie the batteries but hell 3 new opnes new cables gx and the battery guy from sok looked at the setup and has told me it’s a mp issue he suspects..

13

yes 3 parallel. obviously

14

I think finger pointing is the usual go to for many in a difficult situation. There may be a few issues here. Keen to have a look. Internet diagnostics being what they are. I can only speculate as I don’t have all the information. The 5 senses are the best way to diagnose a site. I don’t have the privilege.

It doesn’t help the SOKs case to be sending what would be cell vent temps to the system. But i also dont ever zero on one thing, there must be more than one issue here.

15

if i have a set of pc components and the screen freezes it’s the video card, memory. always…

I could eliminate it by replacing everything else and see if the problem remains or i could swap the video card out aand see if it remains.

we have swapped batteries and cables..what of that is not logic

16

Yeah, its not my go to set up. I am an avid bus bar user. Its easier to single out a delinquent kid in the playground and then send it to time out.
Its odd too that the voltage spikes are on idle or discharge not charge.

Bad omms cables should result in random bms lost signals not bad data such as strange temps.

17

your an expert dumb it down bro.. are you saying instead of daisy chained each battery should be going to the lynx?

18

Individually connected to the bus bar with same length cables so they current share.

19

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20

why wouldn’t they have installed lie that second space i thin it;'s daisy chained as the way it’s laid out in there you could not use same length cables..or they would all be as long as the furthurist battery i’ll ask Brendon if he things those graphs are because of that.. though i doubt it, many systems daisy chained don’t suffer this it would be known day 1