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VE.Direct to USB Interface: USB Serial Number meaning


On a VE.Direct USB Interface, there is a SN (LLYYWWSSSSS) printed on the label on the device, but there is also a serial number reported in the USB "Serial Number" descriptor string which does not seem to match up, with format (VE5Axxxx).

My question is if there is some mapping of SSSSS to xxxx to determine the label serial number based on the USB serial number (or vice versa)?

Thank you!

tolrtd asked
Thiemo van Engelen (Victron Energy staff) answered ·

2 Answers

How many VE.Direct cables do I need?

I have a Venus GX with 2 MPPTs SmartSolar. How much VE-Direct Cables I need? Because the MPPTs communicate over BT. Is one Cable enough to get all data to the GX?

michael-onischke asked
michael-onischke commented ·

1 Answer

mpptprefs or older Victron Connect app download?

Does anyone have a copy/archive of older versions of the Victron Connect app for PC? The full details are below. mpptprefs is also an option but I can't find a copy online anymore.


I have a MPPT75/15 being used as part of a small solar setup for running security cameras on my garage. I have the 4-pin serial port on the MPPT connected to a radio transceiver that relays commands to/from a raspberry Pi at my house. This then extracts various parameters from the output (once per second) and sends data to SmartThings so I can see all the details on a wall tablet that is part of my home-automation setup.

This has worked for years, no trouble. Every now and then I would connect my house-side transceiver to Victron Connect on the PC to do firmware updates etc. Again, no trouble.

However, when trying this recently, Victron Connect just can't find the controller. I have verified that comms is working ok bi-directionally. The Android app also cannot communicate with the controller when using a USB-OTG adapter hosting the radio transceiver. In both cases (PC and Android apps) I can load a terminal emulator and see the data coming in from the controller.

So my guess is soemthing is broken in later versions of the Victron Connect apps. I realise this setup is probably not familiar to all, but it has worked reliably bi-directionally for many years without a hitch. At some point I seem to have lost the ability to have data received by the controller.

I did notice that when I unplugged and replugged the connection to the MPPT controller, the load came on! I wonder if the thing is set to have th eload controlled by the RX pin. But how to change this after it has been set (and how did it get that way). Pulling both battery and solar power to reset the unit does not help.


joel-groves asked
mvader (Victron Energy) answered ·

1 Answer

Are VE.Direct wire connections and bluetooth dongles hot swappable?

I've some MPPT100-20s connected to a Cerbo via VE.Direct and VE.Direct/USB cables.

At some stage I might have to temporarily add a bluetooth dongle to the MPPTs to change settings. Obviously this involves unplugging the VE.Direct/(USB) cable first.

Can this be done while the Cerbo and MPPTs remain turned on, or is there a risk of blowing something up during hot plugging?


peter-bris asked
mvader (Victron Energy) answered ·

1 Answer

VE direct "value"

I have a Victron SmartSolar charge controller 100/20 that I installed in my trailer. I am planning to add a Victron SmartShunt to replace a less capable battery monitor currently installed. I am confused by the value/need of the VE direct. Per the online literature, the VE direct appears to transmit the battery temperature and battery voltage from the SmartShunt to the solar charge controller. I am not monitoring the battery temperature (I am using LiFePO4) and the solar charge controller already measures the battery voltage.


Am I missing something?

Do people use the VE direct function in this configuration?

mva asked
seb71 answered ·

1 Answer

The longest "VE Direct" cable is too short. How can I extend the reach?

It is approx 60 ft from the batteries to the Pilot House. How can I connect a Smart Shunt to the Cerbo GX when the longest VE Direct cable is only 10 meters (32 ft)?

FYI - This is only tempoary until the LiFePO4 batteries arrive in several months. LiFePo4 batteries will use Lynx Smart BMS and connects to the Cerbo GX via network cables.

gbmd asked
Matthias Lange - DE answered ·

2 Answers

Fixing VE Direct Connections

Has anyone found a way to stop the VE direct plugs dropping off - they seem quite weak compared with other connections on my boat electrics and electronics.

mattqthomas asked
hjohnson answered ·

1 Answer

Feature Request - GX and VRM - devices tracked through serial/unique identifier NOT the device ID

It seems to be pretty well documented that there are issues with devices shuffling around device IDs in a system. This is an extreme nuisance for multiple reasons. Firstly, your device history in the GX and VRM essentially get lost. Secondly, if you have a well defined Advanced view in VRM with many widgets, these have to be redone every time the device IDs get shuffled which is a considerable pain due to the interface. While a pretty interface, it is NOT at all an enjoyable process to arrange your widgets in VRM.

I have had this happen twice now in my system in the last 3 days and it is very frustrating and really breaks your historical data used for trending and analysis.

It seems that currently, devices get tracked by their device id (288+). This is a transient value that appears to get assigned to devices when they are connected/on power up (or if a random reshuffle occurs?) and is simple a bus communication port. Given that every device has a unique serial number (and likely other under the hood identifiers as well) why isn't data logged against that vs against the device ID which seems to change randomly without reason. This would represent a much more "stable" view into your data and allow me to trust the long term trends much more.


cookinwitdiesel asked
angeletor commented ·

2 Answers

BMV-712 worked fine until i added the temperature sensor, now transmits garbage ?


my BMV-712 is installed with the victron shunt. There is a connection via the victron USB cable to a Raspberry PI. The text output from the has been working flawlessly for a few weeks.

I added a temperature sensor today, and now it only transmit garbage. If i remove the temperature sensor i still see no text display, just random data.

Anyone have any thoughts on whats going on ?

Thanks !


codematic asked
codematic answered ·

2 Answers

Smart Shunt not connecting VE Direct Cerbo GX

Just installed a Cerbo GX and Smart Shunt.

Powered everything on, and no smart shunt on the Cerbo. I do see it on bluetooth, so I updated the firmware. I have not yet tried a full power cycle. I did reboot the Cerbo a few times.

Not sure if related, but the Multiplus also did not show up on the cerbo. I connected that to VE Bus ethernet port. I plan to try a separate ethernet cable, also had trouble with MK3 to USB adapter to update firmware on Multi.

Was a crazy day. Any advice or trouble shooting ideas would be awesome!

neoneddy asked
neoneddy answered ·

4 Answers

Supported VE.Direct Commands/Register for the Peak Power Packs

I try to get as much information as possible from a Peak Power Pack. What I see is a different behaviour than what's documented. E.g. "VE.Direct-Protocol-3.32.pdf" states in the Introduction: "On power up, a VE.Direct interface will always be in Text-mode, and continuously transmits
all run-time fields. As soon as it receives a valid HEX-message,..." But I've never seen any text message from my Peak Power Pack. I use the software from to read Peak Power Pack with a USB cable. But I only get the main_voltage and the temperature right now. And a message I can't find any documentation:

Parsing data from main_voltage [ED8D] = 13.530

Parsing data from temp [EDEC] = 313.000


So where can I find specific information about how to "talk" to a Peak Power Pack. I need to know if it's charged and the SOC (I know that's a hard question).

linum asked
linum commented ·

2 Answers

Non-Inverting Cable ASS030550200 resistance to pull RX to GND on an MPPT

I want to switch off my MPPT with ignition on. So I have to pull down RX to GND, and therefore I prepared the mentioned cable with a JST plug.

But I recognized that on a high signal the resistance between COM (black) and REMOTE (red) is still some 52kOhms. Is this too much to pull down RX to GND or will it work?

cstenger asked
cstenger commented ·

1 Answer

Detection MPPT 75 10 in Victron connect via USB


the software VictronConnect don't find my mppt.

I have already installed driver and my computer find usb driver for usb port.

I have windows 8.

Can you help me to solve the issue?


mppt75-10 asked
Thiemo van Engelen (Victron Energy staff) commented ·

4 Answers

I have 2 x MPPT 100/50, BMV-712, Color Controller and Multiplus-2 12/1600/70-16 - how to interconnect the monitoring of all devices?

So I have two MPPT 100/50, BMV-712, Color Controller (and Multiplus-2 12/1600/70-16, & 2 x Blue Nova BN13V-108-1.4K 12V LiFePO4 batteries in parallel). That's three VE.Direct devices but there are only two VE.Direct connectors on the Color Controller. I created a BlueTooth network which incorporates all three sources of info (BMV & MPPT's) but although the MPPT's seem to know about each other (plus battery temperature via the BMV) - the Color Controller only seems to monitor the current flow from the one MPPT that has the VE.Direct cable. Also accessing my system via only see's the one/same MPPT device.
Annoying. I'm not seeing the value of BlueTooth and How do I sort this out to properly monitor ALL devices?

mje asked
klim8skeptic answered ·

1 Answer

Smartshunt + VE.Direct LoRaWAN are compatible to send SmartShunt data to VRM Portal?

I think to connect a Smartshunt with a VE Direct LoRaWAN, to read remotely the battery State of Charge and other parameters Smartshunt may send to the VRM Portal.

Is this a legitimate, feasible use case supported by Victron? Anybody tested this configuration?

I read VE Direct LoRaWAN manual but I do not see compatibility with the SmartShunt. Thus my questions above.

Below an excerpt form the VE Direct LORaWAN manual:

Product compatibility

This module has one VE.Direct port and is compatible with:

  • All MPPT Solar Charge Controllers which have a VE.Direct Port
  • BMV Battery Monitor 700 series
  • BMV Battery Monitor 712 Smart series
  • Phoenix Inverter VE.Direct models

The module is not compatible with our Peak Power Packs - even though they have a VE.Direct Port.

More information is also available on our website:

andreir asked
henk-victron answered ·

2 Answers

Multiplus II GX connecting BMV and MPPT

Hi All, I am looking for some options on the best way to connect multiple devices to my Multiplus GX. Up until now I have just had a BMV 700 plugged into the VE.Direct port but now I have installed 250/70 VE.Can MPPT. Originally I thought I could just use VE.Can as stated by the distributor I purchased from but on further research it’s BMS-can only. Is it possible to plug the MPPT in with a to USB adapter? Or maybe connect the BMV to the MPPT via Bluetooth then plug the MPPT into the GX with, would that still pass all the information through from the BMV? Or maybe there is a bridge so that I can interface VE.can to VE.bus? Failing that maybe there is a new BMS master I could use with a current sensor that would pass information through on BMS-can making the BMV redundant and freeing up the port for the MPPT? Any pointers greatly appreciated. Cheers, James

jamesn asked
jamesn commented ·

1 Answer

multiple cerbo gx to connect 6 mppt 150/35 solar controllers

The project that I am currently working on has 6 mppt 150/35 smart solar controllers. I would like to have them all being monitored using the cerbo gx and Victron Connect. I would like to use VE.Direct to connect all 6 smart solar controllers. Would it be possible to add an additional Cerbo GX on the same network, giving me the additional 3 VE.Direct ports needed to monitor all 6 mppt smart solar controllers.

Chad Petersen asked
shaneyake commented ·

3 Answers

Blue smart ip67 workaround?

I have:

Phoenix inverter 12/375

Smartsolar 100/30


Planning to get cerbo/GX to connect everything via

I also have a blue smart ip67 12v/25a. I no longer have PV panels hooked up to the smartsolar

can I wire the blue smart ip67 output (either in power supply mode or charger) to the PV input on the smartsolar to workaround the lack of connectivity on the blue smart charger?

Pedro Rampolla asked
jwfrary answered ·

1 Answer

How do I use Cerbo GX PV monitoring when VE.Bus BMS is using the MPTT VE.Direct port?

I have a VE.Bus BMS connected to a MPPT 100/50 solar charger via a VE.Direct non-inverting remote on/off cable. The MPTT has a single VE.Direct port, so I can't monitor it using my Cerbo GX.

I guess one option is to install a separate charge disconnect device. Any other ideas?


philipa asked

0 Answers

Connexion dongle VE-Direct

Bonjour à tous, j'ai acheté récemment un fourgon aménagé équipé d'un MPPT BlueSolar 75/15. Je viens de commander un dongle VE-Direct pour pouvoir avoir les infos du MPPT sur mon smartphone. Ma question est, peut-on connecter directement le dongle au MPPT si celui-ci est déjà en fonctionnement (branché aux capteurs solaires et aux batteries) ou faut-il éteindre le MPPT pour connecter le dongle. Merci pour votre aide.

maolea33 asked
maolea33 answered ·

2 Answers

My Phoenix inverter 12V 250VA 230V sometimes shows negative output current in VRM

"inverter output voltage and current" readings on the Advanced page of VRM go negative output current (-0.2 for example), sometimes, while it is actively powering a load (tv, phone, computer).

Remote Console shows 0VA but theres 17watts being used as shown by my Smart Plug.

Surely it's impossible for the inverter to do that (negative current).

Grant Willson asked
amirb commented ·

2 Answers

VE Configure III range check error

trying to make sense of a range check error that apperes when i am using configure to commission a new 230 volt multi II 24v with VE config III

am using windows 8



hapa asked
hapa answered ·

6 Answers


I have a MPPT charger and a raspberry pi running Vinus OS connected to the VRM portal. Is there a way to link the MPPT controller to the RPI using bluetooth instead of the USB/ cable ?

jonathan-lewis asked
klim8skeptic answered ·

1 Answer

MPPT 75/15 VE Direct Voltage Fault

I have lost power on pin 4 (Power +) of the VE Direct port. I still have data coming through but no power. Is there any way to test or repair this further or does it mean replacement a unit is required?

paulio asked
wkirby answered ·

1 Answer

RS 48/6000 battery SOC discrepancy between CCGX & Inverter

System is including:

  1. RS 48/6000
  2. CCGX
  3. BYD LVS

RS 48/6000 is connected to the CCGX via VE.Direct

Problem: CCGX shows 49% SOC but Inverter shows 98%

Dose anybody know how I should fix this problem?



aydin-1 asked
mvader (Victron Energy) answered ·

1 Answer

Phoenix Inverter 24V 1200VA 230V Does not follow lowest voltage cut-off

Dear All ,

I have a peculiar issue that the inverter even with hard coded lower voltage cut-off at 18.7V
and alarm at 20V ( Via VictronConnect and latest FW )

and still the inverter cuts off at 24 V exactly.

The current shunt and MPPT controller reports the same voltage during the shutdown

I hope someone could provide some light ?

Thank you

The Harvester

helios-harvester asked
helios-harvester commented ·

4 Answers

Victron Phoenix inverter 24/1200 with Ve.Direct to Generic Venus Device how to change lower Voltage cut off.

Dear All ,

As far as I understand there is a way to change the inverter lower cut-off values for battery voltage.

when I installed the Inverter I didn't change any of the default settings ( I think, I couldn't get the software to work on my pc ), and now I have an issue with the Inverter not working under 24V when the battery bank gets drained under 24V

The main question is, IF I can change the setting for the lower cut off value from my raspberry pi running the official Generic Venus Device image and uploading data to the vrm of Victron.

and this preferably to be done remotely since I can't physically get to it.

Thank you in advance

The harvester.

helios-harvester asked
helios-harvester commented ·

2 Answers

GX touch device not showing energy flow from batt to inverter

Hello guys.

The GX device is not showing energy flow to the inverter??

I am a experienced Victron builder, but have encountered this new problem.

Just finished a DC system for a customer ( AC inverter for the aircondition )

All devices in the system are updated to the latest firmware.

Inverter is connected via VE direct to the cerbo






Yours sincerely,

Lasse Myrén
Technical supervisor


(+45) 21771535

We support Sustainable Development Goal 7
Ensure access to affordable, reliable,
sustainable and modern energy for all.

myren asked
myren commented ·

0 Answers

Smart Shunt range extension with ve direct

Can I use the Smart Shunt’s ve direct port to put a Bluetooth dongle on an extension for additional coverage? Also can Smart Shunt use the ve direct to USB cable to connect to a computer?

chipster asked
victronlfs answered ·

2 Answers

Phoenix VE.Direct and Cerbo GX work fully together?

Do Phoenix VE.Direct and Cerbo GX work fully together? Or are there differences with VE.Bus? Do I have any restrictions with VE.Direct regarding Cerbo GX and VRM Portal?

meda asked
Kevin Windrem answered ·

1 Answer

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