VE.Direct Image


VE.Direct-MPPT in system with VE.Bus BMS, MultiPlus and CCGX

Designing a LiFe/grid/solar powered system with

1.BMS, Multi and CCGX connected via VE.BUS

2.MPPT via VE.Direct connected to CCGX

I have to be able to protect the LiFe battery by BMS switching off charging by MPPT. In documentation we have VE.Direct Remote on-off cable for that.

If I use that port I am unable to connect CCGX to MPPT.

Is it possible for CCGX to switch off MPPT by command from BMS but via VE.Bus connection between CCGX/Multi/BMS?

Miro Vidos asked
Natebert commented ·

5 Answers

Automatically switch on Phoenix 12/500 VE.Direct on recharged battery


is there a way to turn on the Phoenix 12/500 inverter at a defined battery level (or voltage)?

I have a small island system with 240 Wp charging a 55 Ah/12V LiFePo via SmartSolar MPPT 75/12. This is running fine so far, but I often have a fully charged battery with no way to discharge it on the 12 V system (which I use to charge smart devices and notebook computers). So a lot of sun energy is wasted (charger in float mode).

So I installed a Phoenix 12/500 inverter that now runs a fridge most of the time. I also installed an automatic transfer switch, so the fridge gets landline power in case the battery is too low for the inverter. This also works fine.

But now the inverter discharges the battery completely and then it does not turn on again, when the battery is full again. But I would like to switch off at 20% battery level (so I have enough spare for my more efficient 12V system) and automatically turn on at 80% battery level (so the inverter just kicks in, when I risk to run into a 100% full battery)

Is this all possible with the two Victron devices or will I need to read the battery level with an Arduino via from either MPPT or inverter and then switch the inverter manually on and off via the remote control port of the Phoenix?

Thank you very much


Oli_ asked
ripper answered ·

1 Answer

Using Eco Mode in phoenix inverter with complex startup profile smallish loads

I understand that Eco mode pulses the inverter output for a short period and looks for an increase in load in response to determine whether or not to fully power one. It also appears that Eco mode can cause problems with high inrush loads such as compressors. My question pertains to its use will relatively low power loads such as TVs or other electronic devices with sleep (low power) modes and longer duration power up cycles.

A TV, for example, will power up into sleep mode and await a subsequent power on command from the control panel or a remote control; the power sensed by the inverter may not reach the minimum detection threshold. It seems like Eco mode is not well suited for loads with any sort of internal power consumption intelligence - you need something like a light bulb hooked in to the same circuit to provide a power draw that is sufficiently high and of the right type to be reliably detected.

My specific case is for a TV of about 20-60W with a 3-5W sleep mode on a Phoenix 12/250 or similar inverter. My hunch is that this would not work with Eco mode.

Does anyone have any experience with this use case?

mosswings asked
ripper commented ·

2 Answers

How can I see an MPPT via VRM that is connected via a USB dongle?

I have an Venus GX with a Multiplus, two MPPT solar-chargers and a BMV-712 battery monitor. There are only two VE.Direct-Plugins on the Venus GX, so I bought an USB-Dongle to connect the 2nd MPPT. It worked and I could also make it part of the existing network. But I only can see it on site but not via the VRM-Portal: There I only se the BMV and the first MPPT.

So can I only connect two devices (VE.Direct) with the Venus GX for monitoring via VRM?

roemerdesign asked
mrseas answered ·

3 Answers

Venus GX -> NMEA2000 / Signal K

I have an EasySolar 24/1600 that I'm looking to tie into my vessels sensor / monitoring network.

From reading this article it looks like the recommended approach has been to bridge both the VE.Bus connection from the internal MultiPlus and VE.Direct from the MPPT direct to N2K. In the comments section though there was talk of a CCGX -> NMEA integration. Is this still something on the horizon?

I'm assuming it will apply to the Venus GX too? If so, that would be a much neater integration (VE.Bus and VE.Direct -> Venus GX -> NMEA) as well as providing a couple of additional sensor inputs.

On a slightly related note, has there been any consideration for providing a direct Signal K interface from the Venus / CCGX?

kim asked
mvader (Victron Energy) answered ·

6 Answers

SmartSolar settings for RX TX communications ?

Hi Team!

Is configuration needed on SmartSolar MPPT (bluetooth UI) to activate RX/TX communication ? I use Arduino/ESP8266 to read from TX pin of VE.Direct connector but it seems that my MPPT 75/15 charger switch off the LOAD output when I plug. I'm looking for settings in bluetooth UI for RX/TX protocol mode but I don't find... I see that TX or RX can be used as remote on/off switch.

Is there a way to activate serial communication ? I saw TX pin can send data every seconds mode, no ? on MPPT 75/15 ?

Thank you !

Biozor asked
juan3211 answered ·

4 Answers

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

Smart Solar Mppt Control Display - RS232 adapter to

Hi - I am looking for a solution that allows me to utilize 2 connections from my MPPT charging controller. Currently I am utilizing the existing Ve direct connection of my MPPT controller to feed the Victron Energy MPPT Control unit. In addition to that I would like to feed the GX Venus unit. Previous postings indicated that there is only ONE connection per MPPT unit. I have a MPPT 150/70 with an unused display interface. I believe (???) that this interface is a RS 232 port. Can this port together with an RS232 to Ve direct adapter be seen as a SECOND serial port and solve my problem? Any experience from the community?

hanschristian asked
hanschristian commented ·

1 Answer

HEX Protocol Whitepaper v.10 - Remote control section not clear

I bought Victron MPPT 100/50, BMV 702, Lithium SuperPack 768Wh, and even Victron solar panels. All of it because of the great community support and the ability to read status & control those devices without using manufacturer software.

Unfortunately, VE.Direct HEX Protocol MPPT whitepaper rev. 10 (latest) is promising a feature that does not work: the Remote control registers section (p. 18 and p. 20) states that it is possible to upload battery voltage and temperature to a MPPT (from a BMV). Well, this morning in Darmstadt, Germany my MPPT was happily full-blown bulk-charging the Lithium while the battery temperature was 4deg C. According to Victron SuperPack specs this is below the authorized level. All this in spite of a Python script constantly uploading BMV battery voltage and temperature to the MPPT.

Question (supplication...): can the Remote control registers section in HEX MPPT whitepaper be further clarified regarding the Battery voltage & temperature sense commands, their expected response (currently I'm getting "1"), and whether it is necessary to modify the MPPT Network mode to make them work?

Greg. asked

0 Answers

Smartsolar VE Direct vs VE CAN

Hi. Just wondering whether or not there is any difference in terms of functionality and remote control between Smartsolar VE Direct and VE Can products. Is there anyone that have some experience with both that can explain?

Thanks in advance for your help

Jesus Mazo asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

VE.Direct Cable Length

Hi there.

Situation: Battery, MPPT Smart Solar and Multi are in the barn, CCGX ist in the living room.

VE.Direct max. Cable length is 10 meters. Distance I have to build is 20-25 meters.

Any ideas? Maybe convert VE.Direct Protocol to CAN? Or just use some BUS Amplifiers such as 7406? (I am an eduacated electronic technician with no fear of soldering irons :-)

Or convert VE.Direct to any other Protocol such as TCP/IP? Wireless/ BT is no good idea because of some thick walls.

Thank you very much for helping!



Steven Solar asked
Steven Solar answered ·

2 Answers

Phoenix 12/375 VE.Direct not showing watt values on the CCGX

I Have a phoenix 12/375 and a CCGX . When I connect the Phoenix via Ve.Direct to my CCGX I only will see it on the display, but no Values (Watt). Where can I see more details or adjust something ?

Wolle4000 asked
Guy Stewart (Victron Community Manager) commented ·

1 Answer

1 Answer

Venus GX >>> Phoenix Inverter 250W VE Direct

I want to connect a Phoenix Inverter 250W (24V) VE Direct into a Venus GX along with a battery monitor and MPPT 75/15. My questions are;

1) Can I use the USB port for the MPPT and still get information on the VRM portal

2) Will the Phoenix Inverter show on the VRM portal using the VE Direct because it is not a VE.Bus product?

3) If it can - what firmware versions are required for the inverter & venus?

Ian Fullwood asked
Stefanie answered ·

1 Answer

Wiring for non-inverting remote on-off cable

I have two MPPT controllers, that I need to turn off during high voltage event, (HVD) using an external BMS. I have a BMS working that turns off charging to my multiplus 3000 using the 2-wire BMS assistant and the auxilary ports. Thinking I can use the HVD BMS shutoff wire which connects to the multiplus aux and splice them into my two MPPT controllers using two non-inverting remote cables.

Is this possible? and if so, would anyone have a drawing the shows how i would make these wiring connections? The cables use a sing yellow wire only, not a two wire pos and neg that the Multi aux ports use.

I have not consider using a BP100 due to the two way current limitation/fire potential.

Thanks in advance

SolarChain asked
JohnC commented ·

1 Answer

Is there VE.Direct to USB with angled end?

I know there are to angled connection cables, but is there one with the USB on the other end? From what I can find, there are no male to female cables so I would need to USB to with an angled end. -Bill

bigbillsd asked
Justin Cook - Bay Marine Supply USA commented ·

1 Answer

Smartsolar MPPT 75/10 USB on Windows

Iam trying to connect to a Smartsolar 75/10 using the to USB interface on a Windows 10 computer.

I have tried Vitron Connect and VE Power. Both says it cant find any products.

UrbanSk asked
Matthias Lange - Service Team Döbeln DE commented ·

3 Answers

What is the Difference between Blue Solar MPPT X/Y and Smart Solar MPPT X/Y?


Is the only difference of the Blue Solar MPPT X/Y and Smart Solar MPPT X/Y, that

the SmartSolar has bluetooth integrated or are there more differencies?

And is this correct? Only Smart Solar has integrated bluetooth?

Does the SmartSolar have VE.Direct port to get data because the document

states only Blue Solar not Smart Solar to get data.

I need to get data via VE.Direct port but also want to have bluetooth to get Android Application.

So can someone from Victron confirm that Smart Solar has VE.Direct port working to get data

with VE.Direct protocol?

Need to know before to buying the solar charger and the VE.Direct usb cable

tkmbe asked
tkmbe commented ·

1 Answer

Do I need a VE.Direct-USB cable or cannot I connect directly with DiY cable?


I'm in doubt if I need a VE.Direct-USB cable or can I assemble a serial cable?

I want to connect my smart solar MPPT 100/15 and 75/15 either to an Arduino with serial or maybe to en Rasp.Pi to get data logging.

I've read about galvanic problems to connect directly...

Any hints, solutions to create serial or usb cable?

28u$ is a lot of money for people living in Argentina :-(

tkmbe asked
Daniël Boekel (Victron Energy Staff) commented ·

3 Answers

How to change settings without disconnecting cables ? CCGX, BMV-700, MPPT - All connected using VE.Direct.

I have a CCGX, BMV-700, MPPT all connected by

Is there a way to connect to the CCGX to configure MPPT & BMV without disconnecting cables?

Would that work using a USB hub, -> USB cables and something connected to the hub to connect via bluetooth or wifi or LAN?

JF Seatern asked
Matthias Lange - Service Team Döbeln DE answered ·

1 Answer

Can the Phoenix Smart IP43 Charger be remotely switched on/off from Venus GX?

Can the Phoenix Smart IP43 Charger be remotely switched on/off from Venus GX (when connected via VE.Direct)?

mmosberg asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

cannot connect to mppt 100/50 via to USB cable on Android. Works well under Windows

So the Android version of the "VictronConnect" app does not find my above-mentioned charger anymore. I've tried different devices, no dice. Works well under Windows.

I'm using the USB cable, so this probably has nothing to do with the Bluetooth issues I've read about.

It used to work fine until recently. I remember the software prompting me to do an update a couple of months ago or so, but I can't recall whether it was a software or firmware update. This may or may not have been the time it stopped working. I wasn't using the solar system a lot around that time.

Any suggestions?

Thank you!

LemonWolf asked
klim8skeptic commented ·

1 Answer

Temperature compensation versus simple low temperature cut-off for Lithium

Are there any advantages of temperature compensation versus simple low temperature cut-off for Lithium batteries?

I have a BlueSolar MPPT 100/50, 768Wh 12V Victron Lithium SuperPack and a BMV-702 + Temperature sensor. I could buy Smart Bluetooth dongles and have an "active" temperature compensation on the MPPT. But I'd rather avoid Bluetooth and use a VE.Direct non inverting remote on-off cable with BMV-702 relay to setup simple a low temperature cut-off of the MPPT charging.

The whole system will be stored outdoors in a small metal cabinet (close to Frankfurt, Germany). I expect temperatures from 0 deg C to maybe 50 deg C.

Greg. asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

#10 Alarm system time sync error , #1 device switched off random reboots

For last couple of months my system ( 3 x 5 KVA Quattors in 3 phase with BYD 10 KWH) randomly resets ( all the quartos go offline and come back on)

#10 Alarm system time sync error, #1 device switched off commonly seen.

Initially, I Suspected network cabling so replaced with CAT 7 high-quality cables and cleaned the network sockets with contact cleaning fluid

Also, checked if all DC connections are tight ( they are )

There seems to be no pattern to these switch offs ( observed at 2 am in the night and also during afternoon or evenings ) -

The system works fine for a couple of weeks and in one day I could face one or more restarts with associated error logs

All firmwares are the latest except Quatro which are on V430 ( latest is 464 i believe)


1- Is there a detailed log somewhere indicating which unit is causing the shutdown

2. Should I upgrade quattro firmsware to rule out any other issues

3. Is this the issue of any external EMF affecting the network cabling ( they run parallel to the power cables - not in my opinion as CAT 7 are each pair individually shielded )

Class F channel and Category 7 cable are backward compatible with Class D/Category 5e and Class E/Category 6. Class F features even stricter specifications for crosstalk and system noise than Class E. To achieve this, shielding was added for individual wire pairs and the cable as a whole. Unshielded cables rely on the quality of the twists to protect from EMI. This involves a tight twist and carefully controlled design. Cables with individual shielding per pair such as category 7 rely mostly on the shield and therefore have pairs with longer twists.



Anil Ghatikar asked
Anil Ghatikar answered ·

2 Answers

MPPT75/15, use of 5V of Victron port as 5V power supply ?

Hello team!

I have a SmartSolar MPPT75/15 and i'm asking if 5V of the Victron port could be use to run tiny MCU like Arduino or ESP8266 ? What is the power capability of this pin ?

I know I can use a regulated voltage and current from LOAD output with more components...

Thank you


Biozor asked
Biozor answered ·

3 Answers

MPPT 150/85-MC4 aansluiten via ethernet


De vraag is, is er een mogelijkheid om de data of settings te kunnen wijzegingen van uit de mppt 150/85 rechtstreeks te koppelen aan de vrm omgeving.

ve direkt is gekoppeld aan de venus gx

The question is, is there a possibility to be able to link the data or settings of changes from the mppt 150/85 directly to the vrm environment.

ve directly is linked to the venus gx

groeten Klaas

Allroundservicemb asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

Connecting BMV-712 and BlueSolar MPPT 75/15 via VE.Direct?

We have a BMV-712 and want to buy a MPPT charger. Would it be possible to but a BlueSolar MPPT 75/15 (SCC010015050R) and connect it with a cable (VE.Direct) to the BMV-712 and get data from both of them in the app, or do we have to buy a Bluetooth dongle or a SmartSolar for that to work?

eriove asked
Epicycler answered ·

4 Answers

Hallo! I try to read the firmware version from a MPPT 75/15 with command 3 using the (HEX) protokoll

I'm trying to read the firmware version from a mppt 75/15 via (hex). I' was trying the 3 command "App version" but I don't know what the data bites are. With the get command 7 it's clear using the register i.e 0xEDEC for battery temp, but how is this done with comamnd 3?

Get: :7D5ED00[checksum]\n is working for charger voltage

how is the syntax for command 3? :300 [checksum]\n is not working

thanks in advance


JKrammer asked
JKrammer answered ·

1 Answer

Can I use a GX device as Proxy for MPPTs?

I hope I can explain what I am trying to achieve.

Right now, I am always connecting from VictronConnect to the MPPTs via BT dongle, looking up MPPTstats, history, fw updates etc. all working fine.

However, there is an installation I would like to consolidate by ditching BT dongles and connecting two MPPTs vie VE.Direct cables to a Venus GX.

Now my question is if I will see the same information via the Venus GX like I do when "talking" directly to the Bluetooth of the MPPTs?

In short: Will Venus GX serve as a proxy for these devices and if not: why not? ;-)

PetaJoule asked
klim8skeptic commented ·

1 Answer

BMV-602S & VE.Direct Bluetooth (or NMEA2000) Dongle


I recently purchased a sailboat with a BMV-602S Battery Monitor. I was wondering if anyone has had luck with the VE.Direct Bluetooth Dongle or NMEA2000 drop cable working with a -600 series unit.

The compatibility list for the bluetooth dongle only lists -700 series BMV Battery monitors, but the interface/plug on the back of the -600 & -700 series monitors looks the same. Before I buy one, I'd ilke to know if it'll work for my BMV-602S monitor.


llindsay asked
Matthias Lange - Service Team Döbeln DE answered ·

1 Answer


122 Posts
164 Users

Topic Experts

0 Points
0 Points