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VE.Bus BMS verses smallBMS and signalling charge disconnect to MPPT controllers

As I continue to investigate the possible connection options to get my system working as I require and following on from my question about VE.Bus BMS verses smallBMS. I hope someone can help with this part of the communication flow and if any functionality is lost be using a smallBMS verses a VE.Bus BMS.

I am aware that the Cerbo is able to signal via VE.Direct or VE.Can to connected Smart MPPTs that a charge disconnect event has happened. This is confirmed in this post where Guy has stated "Yes, it works. The VE.Bus BMS will signal to the Multi on the VE.Bus, and then that will be sent to the GX device which will control the MPPTs via or VE.Can (>2019 models only) cables."

However there is nothing about the smallBMS. The above post has a link to another post where Matthijs says "Regarding connecting: the Venus GX cant retrieve data directly from the VE.Bus BMS. So, even though they are on the same network (VE.Bus); you still need an inverter/charger in that same network to make it work.". This implies to me that the MultiPlus sends the charge / load disconnect to the Cerbo and not the VE.Bus BMS itself.

While I have a VE.Bus BMS at present it is not connected to the VE.Bus and I am using a 2-wire assistant on my Multiplus. The Cerbo shows this and when the pin on the VE.Bus BMS goes high, the Cerbo state changes too yes. So I know the Cerbo is getting the information.


So the details are getting to the Cerbo. Therefore with a smallBMS or VE.Bus BMS using 2-wire assistant, will the MPPTs still get a charge disconnect via VE.Direct or VE.Can. I am unable to test at the moment as while my MPPTs are installed the Solar panels are not yet installed.

I would like to know if when using the smallBMS, the VenusOS will still signal charge disconnect to the MPPTs, and how I can tell if the signal is getting through to the MPPTs. For info I have two VE.CVan 150/70's connected via VE.Can.

bathnm asked

0 Answers

VE-can MPPT not being recognised properly

Hi anybody else with problems with MPPTs connected throug LAN?

Often my cerbo doesnt rekognize them and reports missing devices, today it shows one of the MPPTS (OST) corrupted as two devices named 0 8 WST (-> See screenshot)
I was wondering why we are producing so much energy :-)


n-dee asked
Daniël Boekel (Victron Energy Staff) commented ·

2 Answers

When will VE.CAN remote configuration be available?

Bouvht the latest Smart solar MPPT because it has VE.CAN,now I read that remote configuration is not available yet using VE.CAN. Should I wait or buy VE. Direct cables to have the option?

ernie asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

Smart Solar MPPT 150/70 VE.CAN

I am about to install the above model into my system comprising a Cerbo and Smart Lithium Batteries with a VE.Bus BMS. I have been reading the manual in preparation and found the following regarding the BMS connection.


I am surprised that it suggest the VE.Bus BMS charge disconnect is connected to the L-Pin. The VE.Bus BMS will supply a high signal until a charge disconnect event occurs when the signal will drop too floating. In all other devices the VE.Bus BMS is therefore connected to the H-Pin. Even the description of the use of the L and H terminal match that in all other manual, and implies it should be connected to the H pin.

Could someone advise if this is a typo in the manual and the VE.Bus BMS should indeed be connected to the H Pin of the Smart Solar MPPT 150/70 VE.Can?

Many Thanks

bathnm asked
Matthias Lange - DE answered ·

1 Answer

Can I connect a SmartSolar MPPT Tr to a SmartSolar Tr VE.CAN?

Good day,

I have a SmartSolar MPPT 250/100 Tr and I need to add another MPPT to my configuration.

I like the SmartSolar MPPT 250/100 Tr VE.CAN and its ability to synchronise charging across multiple MPPTs.

Can I use VE.Direct to VE.CAN interface cable to connect my old and new MPPT?

muchachos asked

0 Answers

Updating firmware MPPT 150/100 VE.Can using VE.Direct + PC software


MPPT 150/100-Tr VE.Can connected to PC using VE.Direct port & Victron serial adapter cable.


When connecting to Equipment via the VE.Direct port with Victron serial cable + PC with VictronConnect software, we are prompted to update the firmware on the device, which then fails (see attached error message: "Update failed! Result: X88 - Communication Error. Vreg Ack timeout. Please check the connection and try again". See photo for error screen.



Any idea how to fix this so we can update firmware via PC and configure settings?


  • We are able to connect with the Android App and perform the update via Bluetooth. Subsequently the connection using the VE.Direct port + PC works fine.
  • We're using the latest version of both the PC VictronConnect software as well as the Android app

If you have any ideas on how to fix this it would be appreciated, as we're expecting to be programming many of these devices and doing so via bluetooth is very time consuming.

Thanks kindly,


allen-upward asked
michelg edited ·

1 Answer

Wireless VE.Can ? Is it possible ?

Have anyone tried to use a Can air or wireless can bridge on the VE.Can net?


gylling-kenneth asked
gylling-kenneth commented ·

1 Answer

Lynx Shunt VE.Can 1000: mV values?

I have a Lynx Shunt VE.Can ( and I would like to connect some non-Victron kit to it to determine power in/out.

The BMV-700 appears to be a 500A / 50mV.

What values should I use for the 1000A Lynx Shunt VE.Can?

rspott asked
rspott commented ·

0 Answers

Is the BlueSolar Charger MPPT 150/70 (VE.Can) ESS compatible ?

I've setup a ESS system with a BlueSolar Charger MPPT 150/70 (VE.Can)

The solar is not showing in VRM. Any ideas as to what the problem can be?



jond asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

Does Cerbo GX output VE.Can data?

I am planning a system around the Cerbo GX that includes:

  • Victron Lithium batteries
  • VE.Bus BMS
  • Victron SmartShunt

I would like to interface with the Wakespeed WS500 alternator regulator that accepts VE.Can data to adjust charge rates/voltages.

Does the CerboGX VE.Can port output battery parameters (charge voltage, current limitation, battery current, etc)? Or does the CerboGX only listen on the VE.Can ports?

scottlykken asked

0 Answers

Resistance sender connector for the VE.Can resistive tank sender adapter?


I just purchase the VE.Can resistive tank sender adapter. Do you know where can I source the Resistance sender connector? I am looking for a inline sender as it is very difficult to access the water tank to install a traditional float. Thanks

luis-gomezcala asked

0 Answers

Why is ASS030520410 VE.Direct to VE.Can interface so expensive?!

My eyes nearly popped out of my head.

I was looking for solutions to connecting more than one MPPT to a MultiPlus II GX and thought, "Could I use a VE.Can port with a VE.Direct to VE.Can adapter?".

Sure enough, there is such a thing "VE.Direct to VE.Can interface" (ASS030520410) but it is about the same price as the MPPT I want to connect about 300EUR.

Now, I have since learned that you cannot use VE.Can on the MultiPlus II GX for MPPTs but I am still interested in why the VE.Direct to VE.Can interface is so expensive?

warwick asked
warwick commented ·

2 Answers

Gateway for Phoenix to communicate of CAN with Orion BMS

I'm looking for experience around controlling Victron inverters over CANBUS. I was told by Orion that their Jr BMS could shut down discharge to protect my battery over CAN, but would likely need some sort of gateway.

chris-knauf asked
wkirby answered ·

1 Answer

Charge limit voltage (CVL) precision

I have a question about Charge Voltage Limit (CVL) when using BMS connected via CAN bus. In my system (VenusGX and Multiplus II) I'm using BMS connected via VE.Can (Batrium BMS). I would like to set Charge Voltage Limit (CVL) to 56.75V, but it looks like precision is fix to just one decimal place, so I need to set it to 56.7V or 56.8V. Is there a way to have 2 decimal places (e.g. 56.75V). All settings in VE Configuration tool have precision to 2 decimal places, why CVL (and CCL as well) is different???

Kind Regards

mysik asked
Daniël Boekel (Victron Energy Staff) commented ·

1 Answer

VE.Can Regulators dropping out on CCGX

Hi Victron gurus,

Any suggestions on how to fix 2 x solar regulators connected via VE.Can to a CCGX dropping out? There is a VE.Can terminator installed at the end as well. Resetting the CCGX did not bring it back.



Johnson Lee asked
ejrossouw answered ·

1 Answer

Skylla-IP44 cable to Cerbo GX


Is my understanding correct that to connect Skylla-IP44 charger to Cerbo GX I need to use RJ45 cable ? It’s being referenced as VE Can, VE Bus and UTP RJ45 so I’m a bit confused.

Also, by connecting these devices I should be able to control Skylla charger through Cerbo GX remotely (on/off) ?

Thank you,


alexandre-berman asked
alexandre-berman answered ·

3 Answers

MPPT 250/100 VEcan with a Venus GX not sharing voltage & temp

We have a MPPT 250/100 VEcan connected with VEcan to a Venus GX that has Temperature sensor connected i have noticed the solar controller is not reading any temp. i have temp & volt share turned on in the venus DVCC.

So i was going to put in a smart battery sense, but the sensor manual said not to with a venus connected as it confuses the system. is this still true?

I would like to get this sorted because we are add 2 more MPPT 250/100 VEcan to the system and want the controllers to sync

nathan-anderson asked

0 Answers

Can a Skylla TG 48/50 charger synchronize with VE.CAN charge controllers?


Can a Skylla TG 48/50 charger synchronize with VE.CAN charge controllers to provide a controlled charge to a common battery bank where several VE.CAN charge controllers are already charging?

I thank you in advance for your assistance.

Kind regards,

blue-sails asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

Has anyone connected a solar panel with an optimizer to VE.CAN charge controller?

What are the field experiences of connecting a solar panel with an optimizer to a Victron VE.CAN charge controller?

blue-sails asked
blue-sails commented ·

1 Answer

VE.Can and VE.Bus???

I'm looking to expand the Victron equipment on my boat and keep seeing references to CAN and BUS....can anyone explain the difference between them?

I've seen CANBus talked about and as far as I understand the CAN is the "brains" and the Bus is the way that the data is shared. What is confusing me is the way that Victron has then separated and there are VE.Can to VE.Bus connections.

bora asked
Paul B answered ·

1 Answer

Connecting a smaller charge controller instead of a VE.CAN controller

I have a common, main DC bus bar.

I am sending 48VDC to it from various energy sources: solar, wind, hydro, a DC generator, and AC energy converted to 48VDC.

To avoid overcharging the batteries after the 48VDC bus bar, I am using VE.CAN chargers that are connected between them as a master with slaves.

One of the problems I have is that each solar panel is connected to a single VE.CAN MPPT charger. The solar panel is too small in relation to the smallest MPPT charger.

Due to shading issues I cannot connect more than one solar panel per MPPT charger.

Is there a way to connect the solar panel to a smaller MPPT charge controller without interfering with the current arrangement of not overcharging the battery or having chargers in standby?

Could a GX display or some other device help me to achieve this? Could up to six solar panels be connected through a GX display, for instance, and could this group (solar panels and device) become a slave of the master MPPT charge controller?

I thank you in advance for any assistance.

blue-sails asked
blue-sails answered ·

3 Answers

RV-C CAN Bus tank monitors

I'm trying to figure out how to take advantage of the tank monitoring capabilities in the CCGX. I know for resistive sending units I need the VE.Can resistive tank sender adapter... My only problem is I have three tanks (Fresh, grey, and black) and these adapters cost $400 each!!! I would end up spending more than twice as much on these "adapters" as I have invested in the CCGX itself.

So I started looking at options. For RV holding tank monitoring: SeeLevel II is pretty much considered the standard for high end monitoring. When i was looking at their product offerings I noticed they have sending units that support "RV-C" which is a CAN Bus based protocol. Since the VE.Can adapter simply converts the resistance it gets from the tank into CAN Bus messages... If the SeeLevel II sends CAN Bus messages to begin with then it *should* be fairly straightforward to just connect these to my existing VE Can bus (I already have a CAN bus between the CCGX and my Orion Lithum BMS system)

That's assuming that the RV-C messages sent by the SeeLevel II are compatible with whatever message format the VE.Can adapter sends. I'm hoping someone from Victron can help me out.

irwinr asked
Kevin Windrem edited ·

6 Answers

Error 67 - BMS Connection Lost on Smart Solar 150/100-Tr VE.Can

I have a Smart Solar 150/100-Tr VE.Can connected by VE.Can to a MG Energy Master LV (With 2 x 200Ah HE batteries) and a Color Control GX. There is also a Multiplus 24/3000/70-16 connected by VE.Bus on the same system.

I'm having an occasional 'Error 67 - BMS connection lost' from the Smart Solar but I have unfortunately been unable to pinpoint what exactly is causing the issue. It never happens when the solar is isolated but randomly when solar is generating. It does not automatically recover unless I clear the issue by isolating our solar panels and reconnecting. Is this a known issue with Smart Solar VE.Can variants? Details are below. Many thanks!


DVCC Enabled

Smart Solar 150/100-Tr VE.Can Firmware v̶1̶.̶0̶3̶ v1.04

MG Energy Master LV Firmware v1.22

Multiplus 24/3000/70-16 (230VAC) Firmware v469

Color Control GX Firmware v2.51

jamesk asked
Daniël Boekel (Victron Energy Staff) answered ·

4 Answers

Get AC output informations via CAN

we are developing an aggregator including 3 Multiplus 48/5000. Our controller is able to communicate via the VE.Bus to VE.Can interface. Currently we can control the inverters and read system informations using proprietary message on the NMEA2000 but cannot get informations about the load because I could not find such VREGs. Which I do not really understand because these informations can be read in the case of other devices.


I would like to ask how I determine the output power, current and voltage data of each phase on the VE.Can.

Balint Major

balint603 asked

0 Answers

HELP NEW SmartSolar 150/70 Ve.CAN Firmware Update Issues

Hello Community.

I have just installed a new SmartSolar Ve.Can Controller. After powering it up for the first time, and connected it the VictronConnect app. It first requested a Bluetooth firmware Update, which was successful. Then when i reconnected to the app it requested for a firmware update (V1.03). The update failed at about 30%. I tried to update again, but it fails a 5% every time.

It displays this...

Current Version : none

New Version : V1.03

X88 - communication error Vreg Ack time out

Ive tried unpairing and repairing, rebooting and restarting. With no success. The VictronConnect app is up to date (5.17).

My phone is Android. I have also tried using a iPhone. Also i have install a BMV 712, and a battery Smart sense, both have connected and updated with VictronConnect on my Android with no issues.

Regards Jamie

housemaster1977 asked
mvader (Victron Energy) answered ·

1 Answer

Help with understanding CAN bus MPPTs connect and display

Hi, I have 4 Smart MPPT 150/70 Can Bus connected together, they are charging fine as a Total input from my panels on the BMV but the CCGX only shows the Watts from one of the MPPT's.

Cannot understand the complete lack of settings out there on how to actually setup the latest VE Can Victron MPPT's, with a Victron Multiplus, Victron BMV and Victron CCGX, I have got it working in a fashion but as you can see from above not quite right.

Any help would be much appreciated.

jonsouch asked
Mark commented ·

2 Answers

Solar Power not displaying on my colour Control GX

I have a colour control GX displaying Geny input AC loads, DC loads normally, but I have changed to 4 x MPPT 150/70 Smart Controllers with Ve Can Bus so I can link my Solar Arrays together, both ends of the chain have terminators fitted and controllers linked together and connected into the Ve Can Bus socket on the CCGX , all Victron Ethernet cables for the job, but the solar output will display. Any ideas. The MPPT's are all working correctly in that they are charging my batteries and controllable with BlueTooth and the total solar input shows correctly on my BMV, but just nothing on the CCGX.

jonsouch asked
jonsouch commented ·

2 Answers

VE.CAN Resistive Tank Sender

Good day. I have a CCGX with a VE.Direct MPPT, VE.CAN Freedom battery, VE.BUS Multi and a VE.BUS Digital Control. I want to monitor a tank as well. Will the VE.CAN Resistive Tank Sender Adaptor be able to communicate via VE.CAN as well. The battery bank is using the VE.CAN port

etienne asked
Matthias Lange - DE commented ·

2 Answers

Lynx Shunt VE.Can Transmit Frequency?

Is it possible to adjust the transmit frequency of the current data (PGN 0x1F214 / 125708) from the Lynx VE.Can shunt? In our system it only seems to broadcast about once every 1.5 seconds. We're trying to feed the data via CAN to an alternator regulator and there's too much latency for the control to stabilize.

More generally, is there any documentation available for the Lynx Shunt VE.Can standalone? All I can find is the manual for the Lynx Ion w/ Shunt, which seems quite a bit different.


relevante asked
relevante commented ·

1 Answer

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