Multiplus-II Image


Multiplus II - DC current is wrong.

I have a Multiplus II 48v 5KVA. When running but with the output isolated, Venus reports 53.53v and -0.7a, giving 37.47W standby power.

Clearly greater than the specified 21w standby power.

The reported current is incorrect, a clip on meter gives 397mA which would give the correct 21W standby power. It is disappointing to find such a large discrepancy on a quality product.

This causes problems with negative DC currents which have been discussed on numerous posts.

Is there any way to zero the current meter in this unit ?

muddy1 asked
wkirby answered ·

2 Answers

MultiPlus: Disable Charger based on battery temperature

I'm currently building an RV off-grid system based around a Lithium Tesla Battery and MultiPlus. In the system is also a BMV 702, BatteryProtect 220 and Color Control.

As the Lithium Battery really doesn't like to be charged below freezing temperature I'm planning to have an automated heating pad that keeps the battery warm, but I would like to have a fail safe which disables the MultiPlus Charger whenever the temperature of the Battery reaches 5°C

My current setup is to connect the BMV-702 Temperature Control Sensor to the Battery and then connected the BMV-702 Relay to the MultiPlus AUX1 which controls the Charger via the Charge Assistant. This works nicely, but I was wondering:

1. The MultiPlus already has a Temperature Sense Connector plus the Temperature Sensor shipped, when I measure the voltage of the Temperature sensor I get a reading of 2.6V at 25°C. Is there any datasheet of the Temperature Sensor that I could use to configure the MultiPlus Assistant for temperature? I would really like to not depend on the BMV for the temperature measuring and best have the MultiPlus measure the temperature directly.

2. I found the new Shared Temperature Sense feature of the Venus/ColorControl: which mentions:

the Venus-device will send the battery temperature to the connected Solar Chargers and Inverter/chargers.

But I don't see anything in the MultiPlus Configuration Screen to do anything with that Temperature or any other way that it actually receives the temperature form the Venus/ColorControl.

Plus just two other small questions:

1. Is there any way to see the current voltage reading on the MultiPlus AUX inputs? I'm having a bit a hard time to find the correct voltages to use in the Assistant

2. When I disable the Charger in the VEConfig all together, but then enable the Charger again via the Assistant based on the AUX1. The charger is actually running! That's a bit scary ;) Also which charge settings are used? I assume just the last settings of the charger before it was disabled all together?

schnitzel asked
durval edited ·

3 Answers

Charging LiFePo4


I have a 16S LiFePo4 160Ah as with following data :


In VE.Config i have left everything default for LiFePo4 but i am not sure it's correct. Right now the battery has been in Bulk for 3-4 h but should it not charge it to 56,8V per the default settings ? Does everything look fine to you ?




peternielsen asked
peternielsen commented ·

5 Answers

Lots of problems with ESS multiplus 2 (error 24)

I Installed a multiplus 2 with 10kWh of BYD batteries in an ESS system first half of the year, it worked well for a month or two then started bringing up error 24, I followed the instructions for what to do for error 24 and sent them off to my victron distributor, victron decided to send me a new unit, I intsalled the unit and instantly had the same problems, after lots of return visits and firmware updates in the hope the issue had been found and resolved which is costing me lots of time and money ive realised that the unit will go straight into error 24 with the current sensor plugged in, If i remove the sensor and restart the unit it starts fine then plug it in it begins to act as an ESS system should with no error code, the problem being that i simulated a power cut by turning the AC isolator off and then back on, and as the sensor is in it goes into error 24, i have updated the firmware twice and replaced the unit. Its a real shame as its also costing the customers confidence in the system i have installed for them, and I cant keep going back to resolve this I have seen on the VRM it is in error 24 again today and i went to them on friday. It has the latest 2629 467 firmware intalled and the UK G98/G99 grid code. Please can you sort a resolution for this ASAP.

jacko asked
on2itmaclennan answered ·

2 Answers

Multiplus II Questions - Humming and adding power with other inverter

Hi. I am the lucky new owner of a Multiplus-II 24/3000-70/32. Just installed it and started using it. I have two questions, the first purely informative and the second more practical.

1. It's humming loudly (relatively). The less load on the inverter the louder. As I go long days with low loads (50-250W) it seems that it will be humming a lot under my ownership. I'm just thinking - sound means vibration and vibration means wear. How will all the solder joints, capacitors and everything hold up with that constant vibration. Maybe I am just paranoid but no other inverter I have used before have had that kind of hum constantly. Can someone put my mind to ease about this and explain if it is just the way they are designed and that it is ok, or otherwise?

2. I have PowerAssist in this inverter which is supposed to combine the inverter ac current with incoming current from the grid or genset if needed upon high enough demand. I have a 900W 24V sine wave inverter from another brand laying around. I wonder if, in the situation I needed it, I can connect that other inverter to the battery pack and feed it into the multiplus to get 2400+900=3300W? Is that a dumb idea or a reasonable thing to do in a pinch?

Best Regards,


mrhappy asked

0 Answers

(not quite resolved) current limit and block FAN HELP

the fan of my multiplus II is blocked at night during its shutdown and in the morning I have to restart it by hand.

I ordered a new fan, in the meantime can we force the fan to run permanently

Hello everyone

I need some information:

my system: multiplus II GX 3000VA 48

: MPPT 150-60


ESS, DVCC charging current limit 60A

lifepo4 200Ah 16x 3.2v

voltage absorption 56v

Float voltage 54v

with a -1000w network, 1600W MPPT power

the charging current peaks at 40A?

which parameter is blocking?


Hello ,

I was able to have the SMA party AC recognized

but here is another example of limitation


The output power of the multiplus is limited to 1000w why?

the battery should provide the missing power

The output power of the multiplus is limited to 1000w why?

the battery should provide the missing power

sorry for my bad english google and my friend and i'm french

How to control the operation of the cooling fans of the multiplus

I find the multiplus II very hot and I don't hear the noise of the fans running

Good evening, I opened the lid of multiplus II GX, the fan was blocked, which explains the current limitation in charge and discharge to limit the temperature of the devices

jolilo asked
jolilo edited ·

0 Answers

Systeme coupure de decharge batterie suivant un créneau horaire (FR/ESS/EDF-HP-HC)


voila mon architecture et la suivante

- j ai un Multiplus 5Kva raccorder à une batterie plomb carbone en 48V de 440ah

- un régulateur MPPT 150/85 avec 2640w de pv

le but serai de désactiver la décharge de la batterie sur le créneau horaire des heures creuse en France de 23h à 7h.

actuellement pour se faire je suis obliger de le faire de façon manuel en allant tous les jours dans le menu ESS de mon venus Gx et modifier le SOC minium (sauf défaillance réseau) pour qu'il arrête de décharger la batterie et repasser sur le réseaux.



here is my architecture and the next

- I have a Multiplus 5Kva to connect to a lead carbon battery in 48V of 440ah

- an MPPT 150/85 regulator with 2640w of pv

the aim will be to deactivate the battery discharge during the off-peak time slot in France from 11 p.m. to 7 a.m.

currently to do so I have to do it manually by going to the ESS menu of my venus Gx every day and modifying the SOC minium (except network failure) so that it stops discharging the battery and going back to the networks

thank you

baptiste bodier asked
Thierry Cortassa (Victron Energy Staff) answered ·

6 Answers

Multiplus 2 48/3000 LED Bedeutung


Ich besitze nun seit 1nem Tag ein Multiplus 2 mit Phylontech Speicher.

Mein Speicher ist nun auf 100% Aufgeladen und frage mich nun wieso die grüne LED Inverter On Leuchtet.

Die Batterie ist gerade im Absorption Modus

Mains On LED sowie Absorption LED Leuchten.Wieso den die Inverter On LED?

Vielen Dank



christianborucki asked

0 Answers

Firmware update 2609486 for MultiPlus 12/3000/230-16

Is it just happening for me, or is there a bug in the latest firmware for MultiPlus?
I just updated it, I think it’s only the name because I can see the inverter still says 230V.

But according to VRM and GX Devices, it’s now a MultiPlus 12/3000/120-16.



sebastian-w asked
Matthias Lange - DE answered ·

3 Answers

>10kVA and dedicated production meter

I'm designing a 3-phase ESS system based on 3x a Multiplus-II 5000 with the solar panels feeding in on the DC bus.

3 times 5000 VA brings the total inverter kVa >10kVA and as such is no longer considered a "residential" installation in Belgium and requires special permits and requirements.

One of these requirements is the instalation of a dedicated production meter. This meter is supplied by the grid operator and needs to measure the AC energy produced by the installation.

As the loads on AC OUT, might receive power from AC IN as well, it is not OK to connect such a production meter directly to AC OUT.

The only suitable place is directly behind the inverter and this is not an exposed connection on the Multiplus.

Does anyone know if making a tap directly behind the invertor for connecting a production meter is feasible to do?
Or are there any alternatives possible?

johan-b asked
wkirby commented ·

2 Answers

How to balance 2 MP-IIs in parallel

For last 3 months I trying to set-up 3 phase/parallel system out of one EasySolar-II and 5 MultiPlus-IIs.

First, in June 2020 I purchased ES-II and 2 MP-IIs and set-up my 3 phase system.

After couple months I realized that 2.4kW per phase is not enough for my house.

Decided to add 3 MP-IIs in parallel.

Asked my Victron supplier if there is a MP-II still compatible with my MP-II for parallel operation.

In turn he asked Victron the same question and got the positive answer.

"There is no problem to connect the actual produced unit in parallel to existing. The only thing is - firmware must be identic (which means that the units are identic also)."

At the beginning of 2021 I received 3 new MP-IIs.

To make this story short, after setting all up I have a problem with load balancing in all 3 parallel channels.

All wires on the DC and AC are equal lengths from the point they split to master and to slave.

On DC side wires are 35mm2 (around 50cm long from the split point) and on the AC side 6mm2 (around 60 cm long from the split point).

FWs are identical.

I am getting the following results when each phase is, one by one, loaded with 2.4 kW resistive load.

L1 Total 66A, Master 38A, Slave 28A

L2 Total 54A Master 32A, Slave 22A

L3 Total 55A, Master 32A, Slave 23A

Any suggestions how to make the currents equal?

The stickers on the boxes show the model numbers and part numbers of the first and the second batch.



marekp asked
Phil Gavin commented ·

2 Answers

Multiplus II in an RV - does it behave like a traditional converter?

I’m finally receiving my Multiplus II 2x120V next week. I have much of its capability figured out and everything pre-wired and ready to go. I’m running lithium batteries and am in an are where winters are extreme so will inevitably have periods in the fall and spring where I won’t be able to use them due to sub zero temperatures.

A traditional converter in an RV will supply the 12v circuit with power from the 120v source even without a battery connected. My question is, will the Multiplus provide similar functionality converter functionality?

cory-gould asked
Matthias Lange - DE answered ·

1 Answer

Connecting Multiplus-II with ET112


I have a problem establishing a working connection between the Multiplus-II 48/3000/35-32 230V GX an the Carlo Gavazzi ET112.

Basics about our setup: Wie have a PV Inverter feeding into the grid, we want to store overproduced Energie into batteries. So we installed the ET112 directly behind the energy meter from our provider. Then connected the data lines following the instructions from the manual, (10-15m CAT-5 cable, FTDI-USB RS485 Bridge with cable shortend to less than 20cm, etc).

When plugging in the FTDI Bridge, there is a short blinking of RX and TX Leds, but nothing else. To verify that our connection is working, we downloaded the Carlo Gavazzi Software for the meter, which instantly connected to the meter. So i guess the RS485 Bus, FDTI and ET112 are working just fine.

But there is no energy meter shown in the remote console of the Multiplus-II.

We tried multiple Configurations of the meters RS485 interface without success.

To verify that the FTDI ist recognised by the Multiplus-II we logged into the system via SSH an lsusb revealed that the USB/RS485 bridge is at least hooked to the system. A hexdump of /dev/ttyUSB1 did not show anything. No LEDs blinking on the FTDI showing that the Device is trying to transmit data.

In the Carlo Gavazzi Software, the standard RS485 configuration is 9600, parity none, stop 1, modbus id 1. Due to the fact, that a baudrate of 1152000 did not lead to any problems during the use of the Carlo Gavazzi Software, there should not be any issues with the cabeling.

So i hope that someone here might have an idea of what is wrong.

Tim Schlak asked

0 Answers

VRM missing load - all inverter loss?

I have a DC solar setup with lithium batteries and a multiplus 3000/24. Everything is working well, but when looking at VRM, part of the load is missing. That is, the numbers do not add up. My AC load is primarily resistive, with a gas absorption fridge utilizing heating elements, the wiring is proper or oversized, and the load is low enough that wiring loss is negligible. Inverter efficiency, power factor of other small loads, and charging losses might make up the difference, but it would be really nice if the VRM portal numbers came closer to adding up. It would also be nice if the Multiplus could report power factor of the AC load. These things aside, though, am I missing something on why the load numbers are so far off? 100w on a 600w load seems significant. Thanks for any insight.



Jim asked
Jim commented ·

3 Answers

Multiplus II 2x120V, can it sense L1 and L2 phase?

If connecting the Multiplus II from a 30A (or lower) service with a dogbone adapter with L1 and L2 tied together, does it know it's just 120V single-phase and ignores (does not pass-thru) L2?

Moreover, in that same scenario, would PowerAssist still work from L1?

hookem asked
Mike Dorsett answered ·

1 Answer

MUltiplus Firmware upgrade failed with "Error Connection"

Multiplus 24/3000/70

Firmware 2612154

I need the ESS assistant so I have to upgrade to firmware version 2612481.

Followed the instructions in Update firmware document and the video.

Using MK3-USB interface (VE-Bus to USB)

Connection via VE Configure: I can read all data

Upgrading via VE-Flash (version 90.05.154).and windows-10

finds auto detect port COM4

Connect Part 2 -- Error connection Please try again

any suggestions?


jan-boskemper asked
lsi answered ·

3 Answers

3 Phasensystem erweitern?

Ist es möglich, ein 3 Phasensystem ( 3x MPII 3000) auf der ersten Phase um ein Gerät zu erweitern. Sprich 6000W nur auf Phase 1?

michael-neumann asked
michael-neumann answered ·

2 Answers

Multiplus-II 48/5000 efficiency curve

Hi Victron team - are you able to share the efficiency curve for the Multiplus-II 48/5000. I realise you have one for the 24/3000 in your whitepapers - a similar curve for the 48/5000 would be greatly appreciated



tkrull75 asked
raphael edited ·

3 Answers

#1 device switched off -sometimes permanent

Hello all,

as you may know iam new to Victron (1 week now).

And unfortunately, I'm already getting a headache.

Besides all the minor problems (battery is discharged above the overcurrent limit, or not at all although I draw from the grid), I have since the beginning the problem that power outages happen from time to time. (Grid stays ok)

One time i had to manually turn down every Voltage (Bat + Grid) to restart the Multiplus.

I have 3 Multiplus 5k/48V

No alarm is recorded in the VRM.

Today I got the alarm "#1 device switched off" in Cerbo.

Since I have had several outages (about 2 per day), I set up a camera to film the Victrons.

What can I do here? No one was home, so consumption was very constant. There was no washing machine or dishwasher running or anything like that.

The battery was full and not in use.


FW Cerbo (Venus OS) : 2.72

Multi 2 : 482

The Inverter with the LED Code swaps always. Sometimes L1 (Master), sometimes L2 or L3.

Sorry for the Cablemess- i changed everyCable to nail down the Problem.

marv21 asked
marv21 edited ·

3 Answers

Multiplus 2, load the Battery function not needed

Hello everyone,

we are using a Multiplus 2. In our case it should only invert the power from the battery and take power from the grid, if necessary. It is main task is not to load the Battery! In order to load the battery, we use a PV. I could not find anything about turning off the Load function. Please help

Cansin Sari asked
marv21 commented ·

1 Answer

Possible feature: Select time to discharge battery

Hi all!

I have a ESS grid paralell system (Victron Multiplus II 48/3000/35-32, Solaredge SE300H, Cerbo GX and Pylontech US2000C). Until now everything is working fine, it is charging the battery with the exceed of the PV inverter and then use the power of the battery during the non-solar moments). I see the option of "schedule a charge on battery" where you can select a time where you can charge the battery (per day, only once, etc), but I would like to know if it could be possible to select the other way around, select in which moment you want to use the energy from the battery -I read all the documentation several times and I don't see it, not sure if this is implemented now-

Why? In Spain, where I am living, at this moment we have two different electricity tariffs during the day (peak and valley), so in my case, I would like to use the battery especially during the "peak" tariff only and keep the charge if there is "valley" tariff (it is two times more expensive during peak than on valley).

Thanks in advance!

pabloguti asked
marv21 commented ·

0 Answers

Lynx Distributor Red LED - But Fuse Not Blown.


Hoping I can get some help here, I am installing 2 new Multiplus-II in parallel system and all seems to be working well except i get all LED lights as red on the lynx distributor when I have AC power on and the inverters are charging. I have tested all the new fuses just via continuity test and the batteries are getting charged.

The even stranger thing is this: When I put the 120x2 3000 12v 50a Multiplus in standalone operation, they light will be green, then turn red after a period of time, then green again, but as soon as I put them in parallel and they are both charging the batteries from AC power, the led's on the lynx distributor stay red.... I have the battery protect connected to one slot on the lynx, 2 inverters (multiplus-II) each in its own slot, and the final slot is taken up by my BIM to chassis battery/alternator. The batteries are connected to the Lynx shunt via the end posts (where most people would connect the lynx power in). All the components have shutoff switches in between them.

Any help in understanding the Red LED's when under load would be greatly appreciated. As soon as I turn off the load the led's go off, and only the one green in the center of the distributor is lit. The lynx shunt stays green in any scenario.

Update - Even in standalone when the lynx distributor is under load the lights turn red. I have taken everything back apart and verified every connection but no matter what, under load, I get red lights on the lynx distributor. @Guy Stewart (Victron Community Manager) - Either load from chargers or load from the coach, ie when I turn on a microwave and a heater, it happens every time. I have ordered another lynx distributor to see if maybe it is a hardware board fault? I can't think of anything else it would be... Thanks for any advice in advance.

I have raised this with my retailer (CR for multiplus, and another company for the lynx) and they stated they would open a ticket with Victron, but have heard anything. I think this is an odd one, but maybe Victron staff have ran across this before?

cory cantrell asked
jedm answered ·

2 Answers

Short power interruption reoccuring every 3 days or so

Hello all. On my sailing yacht I have a new installtion (about a month old) of all victron components. Mainly 3 x 200Ah LiFePo batteries, Multiplus Compact 12/2000/80, Smart BMS 12/200, Cerbo. I witness very brief power interruptions, whether I am on shore power or on batteries only. This happes about every 3 days and they last a second. Then the system restarts. This is not very reassuring, especially not when far away from land. What could be the source? Unfortunately the Cerbo log is not helpful as it does not show any irregularity..

maxx92 asked
maxx92 commented ·

4 Answers

anciens sunny boy sma et connection multiplus


j'ai deux sunny boy de 24 v et un windy boy qui reinjectent dans le reseau ac depuis 2008 il font 1100w chacun; puis je les connecter sur la sortie du multi ? ou sinon comment les prendre en compte sur l'entrée ac, il sont eloignés et non connectés sur wifi ou reseau. le multiplus est un 5000va 48 volts les deux sunny boy sont des 24 volts cc; merci

jean-paul asked
jean-paul commented ·

2 Answers

South australia VDRT requirements Multiplus 2

Hey does anyone know if/when victron are planning on getting there multiplus 2 inverters on the VDRT compliance list for south australia?

dane asked
Guy Stewart (Victron Community Manager) commented ·

2 Answers

Incorrect energy display in VRM portal - MultiPlus II with EM24

I currently have the following phenomenon:

In the VRM Portal the displayed sum value of the energy meter jumps between a few watts, the current power of a phase and the correct total power (see image 1).

Via the remote console, the correct value is always displayed (in the system schema as well as on the overview page).

System setup:

1 MultiPlus II GX FW: 2.72

Connection mains parallel to AC1

Energy meter EM24 Ethernet FW1.6.48 - use phase balancing 3P.n

- AC coupled PV system with power feed-in

- ESS with external meter


1) example Remote Display & VRM Dashboard with different energy sum


2) example VRM Dashboard correct sum energy


3) example VRM energy meter log

chris-zell asked

0 Answers

Can you program 33v charge from a 24v Multiplus?

I am using an 8S Nissan Leaf battery system and use 32.88v at programmed full.

I'd like to know if the 24/3000/230 Multiplus II GX is capable of a programmed 32.88V DC output to charge this battery bank.


thirdeyesamuel asked
thirdeyesamuel edited ·

1 Answer

Multiplus II 12/3000/120-50 minimum shore current in parallel


I have in parallel 2 inverters Multiplus 12/3000/120-50 230V version in camper. From time to time at some small camping site are AC inlets with C6 fuses.

For my modell minimum shore current limit is 4,3A with newest firmware. On GX Touch I'm able to reduce AC current to 9,2A (means 2x Multiplus minimum).

And now question: is any solution to reduce this current more or this is hardware limit? Of course I can divide my installation to 2 independent Multiplus + GX Touch, but this is last thing.

Is possible to shut off one Multiplus and work only with only one on poor inlets (without changing config with VE.Direct cable)?

Thanks for reply.


damian-ext asked
Mike Dorsett answered ·

1 Answer

External Cooling Multi Plus 12/3000 How to setup?

I want to place 4 12VDC 80mm case fans in the bay that houses the Multiplus. When the fan activates on the Multiplus I want the relay to close and the external fans to come on as well. When the fan stops I want the relay to open. Everyone keeps saying there is an assistant for that, but I don't know what that means or how to find them. I do have the MuliPlus connected to my laptop so I can program it. I also have a CCGX if that makes it easier?

jjack811088 asked
Noah Taylor commented ·

1 Answer

How to protect your batteries against a failed Multiplus?

Many know that a battery protect cannot be connected between a Multiplus and the batteries. So if while unattended, the Multiplus throws a wobbly and either continuously charges or discharges the batteries, what can be used to disconnected it when the voltage exceeds some pre-defined limit? I know when it's working it will look after the batteries. My concern is when it fails. With a separate charger and inverter, a couple of battery disconnects could be used, but not with an inverter/charger.

I know many LiFePO4 batteries have a built in BMS which will disconnect them but I have a Batrium BMS which will ask the Multiplus (via the CAN bus and Color GX) to stop but cannot actually disconnect it.

I supposed I could use a big relay but I don't like the idea of having a permanently energised relay in the system.

I guess I'm looking for a 250A (I have the Multiplus 3KVA) common port battery disconnect.


Colin Mills asked
Colin Mills commented ·

1 Answer

1198 Posts
779 Users

Topic Experts

Rob Duthie
404 Points
255 Points
98 Points