Multiplus-II Image


PMP482505000 and PMP482505010 -> 3 Phase Setup

Hey Community !

i will update my single Phase Setup to a three Phase Setup in a few days. My "old" MP II is a PMP482505000 which worked for nearly 2 years without a problem. The 2 new units are slightly different to the old one (PMP482505010).

Are these 2 units able to build a 3 Phase Setup ? If yes: are there any limitations to be expected ?

Thanks a lot !


stxShadow asked
Paul B answered ·

1 Answer

Will a Multiplus-II work in this scenario? ESS with AC coupled PV, only want to power critical loads from battery

I am investigating the use of a Multiplus-II in the scenario illustrated below and have a couple of questions. The SMA inverter is already in place and I do not own it so therefore do not have the option to move it. I would be adding everything else in the schematic.

1) To power the critical loads, I want the power to come from the PV on DC array first, then the battery, then the PV on AC Array, then the grid. Is that possible?

2) To power the normal loads, I want the power to come from either of the PV arrays, then the grid, but never from the battery. Is that possible?

3) With the SMA and Victron inverters on the same circuit, will there be any issues such as anti-islanding conflicts?

4) On a very rare occasion, the SMA will push power to the grid. With the AC sensor installed, I am assuming the Victron will push zero power out as the net overall demand reaches zero. If the SMA were to continue to push out power to the grid, will there be any adverse effects to the Victron? Will it just stay at zero output without generating an error?

5) In a slightly different configuration, is it possible to set the ESS system to allow a certain amount of power to the grid? Say for example 2kWh?


CobraPhil asked
CobraPhil edited ·

2 Answers

Limit charge current ESS

System - Venus GX, Multiplus II 3000VA

I have set the charge current to 30A(rather than 32A) - I have tried to change the charge power in ESS to a lower value, but any change has not had an effect (eg: when I dropped the charge power to say 500W, it still charges at 30A roughly 1650W).

Battery - Li Ion

ispookie666 asked
ispookie666 commented ·

1 Answer

Multiplus II 48v 3000 buzzing relay and high idle consumtion

When grid connected, relay is quiet. When disconnecting grid, relay start buzzing. Or sometimes the relay is quiet and when I gently knock on the casing, relay start buzzing. Any thoughts?

The seller I have buy it from does not answer me. Is the relay possible to replace by my self?

And the unit draws over 40 watts in idle current when inverting.

I live in Sweden, any chance that I can claim warranty any other way? The unit is 3 weeks old.

Kirtap asked
Kirtap edited ·

0 Answers

Multiplus II no load consumtion are too high

My new Multiplus II 48V 3000VA draws 0.89A at 52V when no load is connected. That is 46 watts. In the specification, it should draw 11 watts. Is my device broken?

I have double checked and triple checked with different measurement methods. And even the Multiplus and BMV tell me 0,9A.

I bought this specifically because it would only draw 11 watts compared to 40 watts that my old inverter draws as I have limited space for solar panels and the inverter need to be on 24/7.

This one draws even more than my old cheap chinese inverter.

Any suggestions? Or is it just to return the device?

Kirtap asked
Kirtap commented ·

1 Answer

Helioscope Victron Product Database

I have noticed that the VICTRON Product info and specification listed on Helioscope is incorrect.

They still list the BLUESOLAR RANGE of Gridtie Inverters. Maybe Victron can be in direct contact with Folsom Labs to update and provide the correct information on you products to ensure that our simulations are correct.

You can contact Canute Haroldson -

Anton de Swardt asked
warwick answered ·

1 Answer

Difference between Multiplus II with Cerbo GX and Multiplus II GX


What is the difference of buying a Multiplus II with included GX and a separete GX and a normal Multiplus II ? I will have two SmartSolar controllers if that makes any difference also i need CAN for a BMS.


peternielsen asked
peternielsen commented ·

1 Answer

Where do i find the best deal on Multiplus II, SmartSolar and GX devices in europe ?


I am looking to buy

  • 1 x Multiplus II 3000 48V,
  • 1 x Cerbo GX,
  • 1 x SmartSolar 150/60 Screw Terminals
  • SmartSolar 150/45 also with screw terminals.

Who was the best deal on these devices in Europe and can ship to Denmark ?


peternielsen asked
peternielsen answered ·

2 Answers

Multiplus2/Bluesolar limited/throttled solar production


2 x Multiplus ii 48/3000/35-32 in parallel

1 x Bluesolar MPPT 150/70

8 x Trojan T125

18 x Renesola 300w panels 6 strings with 3 panels per string

Running ESS feeding excess to the grid.

I started off with 1 multiplus and 9 panels with average output as per graph.


I then upgraded with another 9 identical panels. The output was capped at just over 2kw.


And after adding another multiplus it is now capped at 3,6kw from 10am to 2pm.


Thinking that the inverter current is derated due to temperature as the internal fans switch on at 09:30 in the mornings already with room temperature between 20-23 degrees C, I have installed 2 120mm ac fans on each inverter and another one on the mppt ducting air into the bottom intakes. Before the mppt was almost hot to the touch, and now cool after installing the fan from 10-4pm. The fans made practically no change to the solar output.

MPPT current at the peak readings is 108V and 33A that is just over 50% capacity. At 3,6kw production the inverter is running at exactly 60% of the rated output. Any suggestions as to why production is limited or capped?

Wannibi asked
Wannibi commented ·

2 Answers

ESS 3 phase 3 with external control, one phase sometimes ignores setpoint

I might repeat myself but i am scratching my head and the problem is not solved.
My ESS is 3 phase, with Multiplus-II 5000 on firmware 474, Venus on 2.60. I use external control.

Sometimes one of the Multiplus units on one phase apparently decides to ignore the setpoints and starts doing odd things .. with the result being a wild ride between feed-in and consumption.

The situation resolves after some time, but that can take an hour or so. The other multiplus'es follow the instructions without issue.


this is the problematic phase only, SP is setpoint.
The overview of all 3 phases for a longer interval is here:


you can see that normally the inverter follows the instructions well ..

Any advice appreciated.


jacola asked
Daniël Boekel (Victron Energy Staff) commented ·

2 Answers

Victron Installation Review

Hi Everyone,

Have asked a few questions in the past with my ugly DIY install, have gotten lots of constructive feedback and finally got home so that I could rip it all apart and start over. Looks a bit less like kabalsalat, the worst of it that's left is the original Airstream wiring. For anyone that's curious, prior thread is here:

Here's a snapshot of the system today, completely reconfigured and rewired, upgraded the battery leads to 1/0 as recommended. Got rid of the massive industrial bus block, I think that was the main source of issues based on the condition it's in when I pulled it out, looks like two of the positive leads had worked themselves a bit loose. Added the battery disconnect per guidance, no-brainer that should've been there from the beginning. Lots of folks appear to put a disconnect between the MPPT and the batteries as well, but this seems redundant with the circuit breakers as you can manually trip the breaker and achieve the same goal.


Couple of known items are to re-run shore power (no shore power included in this photo) and hook up two existing air circulation fans.

One more thing - hard to get a gauge from the photo, but all of the battery leads are the same length, 20". Tried to be efficient with the length, but it was a bit tricky since I have them in two different orientations to save as much space as possible. The negative lead is pulled off the top left battery, through the CSL, then the BMV shunt, then runs to the inverter. The positive lead is taken from the bottom left battery, straight into the battery disconnect, then to the inverter & BGA together, then positive bus bar for the DC loads.

Specific wrap-up questions:

  1. Am I missing any other disconnects? Various schematics seem to include one from the MPPT & tow vehicle trickle charger, but I don't see a point if the MPPT is protected by breakers and I don't have a trickle charger.
  2. Do I have the order correct on the negative side? Should it be CSL then shunt as I currently have it, or do I need to flip that? I know the shunt should be the first thing load-wise, but my reasoning was that the CSL doesn't draw anything on a stable basis.
  3. As I slim down my DIY'd and over-engineered system, I review the Multiplus specs and it looks like my Go Power automatic transfer switch is redundant with the built-in capability of the Multiplus. Is there any reason I should still include the Go Power automatic transfer switch when I re-run the shore power? I'm re-running a completely new lead & replacing the inlet, so it would be a convenient time to remove the transfer switch if it is unnecessary.

A bit about my system overall:

2003 Airstream
960W renogy panels, 6 x 160W each hooked up in Series-parallel configuration (two sets of 3 panels in series, then paralleled into the MPPT)
800 Ah BattleBorn batteries, 8 x 100 Ah each

BGA-225 battery guard
Victron Multiplus 12/3000/120-50 120v VE Bus

Victron SmartSolar Charge Controller (150V 45A Tr)

Victron BMV-712

Current Surge Limiter (CSL for short) (

Go Power! TS-30 30 Amp Automatic Transfer Switch (likely to be deleted)

OleSimo asked
OleSimo commented ·

2 Answers

Multiplus Cables Overheating

I have recently installed the following

  • 335 W Solar Panel
  • SmartSolar 100|30 MPPT
  • 200 Ah Smart Lithium
  • SmartShunt 500Amp
  • 12|2000|50 Mult
  • BlueSea 6006 (rated 300amp)
  • Self Made Bus Bar (1x.25 with 3/8 holes -or- 25x6 with 9.5 holes)

I have been testing things before putting the system under (big)load and things have been coming along nicely. Today, I put the system under a 1500w load. As soon as I do the SmartShunt temp begins to rise quickly. All cables are getting warm (Pos and Neg, Battery to Bus and Bus to Multi). The cables are 1/0 AWG. Connections are tight. When the temp gets to 40C or 105F I am removing the load.

I've added pics of system and screen shots from MPPT, Shunt and Multi.

Any help would be appreciated.


VanMan asked
Justin Cook - Bay Marine Supply USA answered ·

2 Answers

CCGX Not showing PV Production

We have a customer with the following installed:
1 x Victron MultiPlus II (48/3000/35-50-230V)

2 x Fronius 3kW Primos (1 on the input, one on the output)

7kWh of BYD batteries

Currently everything is working ok, except there is no pv production being recorded and displayed by any of the Victron devices.

Using the Remote Console I can see that the MultiPlus is aware of both of the inverters. The customer has a Solar.Web monitoring setup for the Fronius inverters, but can only monitor one of them, so the customer can't use Solar.Web to record production data.

All of the devices are connected to the customers wi-fi, though it is not the best signal strength at the inverters.

The customer used to have the PV Production showing on the CCGX, and in the past a reboot through the CCGX would get it to find the Fronius', though this isn't working anymore.

I have had the customer run through a full shutdown of the system and restart, but this hasn't changed anything either.

There hasn't been a firmware update installed since the customer had the ability to measure

Any help would be greatly appreciated.

SD Jesse asked
Alexandra commented ·

0 Answers

Multiplus 2 VDE0126-1-1 VFR2019


When we select the country Grid "France VDE 0126-1-1 VFR2019"

The over frequency seems not to be OK. Indicated value is 50,6 Hz but should be 51,5 Hz.

Please confirm the adjustments


avnor asked
mvader (Victron Energy) answered ·

2 Answers

Converting a 24V alternator with an inverter in a 230V generator for a multiplus II 48/3000. To good to be true?


Still designing, came onto an approach which seems to me almost to good to be true (in my case), so I have the suspicion I make a mistake. Can you enlighten me?

The engine of my truck exists with 24V 35/55/80A alternators, so I assume that on the 80A model I could use about 50A (so roughly 1000W) without impacting the core of the truck.

I would prefer to run my "ESS" on 48V as it makes technically and financially most sense.

Now I could run 24-48 DCDC convertors, but to get to 25A on 48V takes 3.

But I could also run a 24V inverter and use it to convert my 50A spare of 80A 24V alternator in a 1000W 230V generator, which I connect to the ACin of the multiplus. In order not to stretch my alternator, and leave my truck stater batteries alone, I need a multiplus where I can set a very low limit on the ACin, only the 48/3000 model with limit minimum of 4.3 A stays in the 1000W ballpark (5000 is 6A). If I put a Cyrix 230A between alternator/starter battery & the inverter which I can program a bit, I should be able to make sure the invertor only kicks in when the engine is running. As the inverter can be rather simple, the 24 1000W (or let's say 1500W to be safe), can be a more plain (cheaper) brand as Victron. Or do you see a benefit of using a Phoenix

Fringe benefit, I can boost the AC out 2400W of the multiplus to 3400W (or about) by running the engine, and while I drive my base equipment runs on the alternator, only using the mutiplus/battery/solar for powerassist , and for charging my living batteries with whatever is spare of the 1000W.

When connecting to a landline (or other 230V source), I disconnect the inverter and replace it with the landline, the UPS function makes this transparent on the ACout side.

Eventually I can add a low power 230V 24V charger to AC out, and use that to maintain the truck starter batteries during longer stops (e.g. think parked 6 Months between holidays). I don't risk to make a loop as when the engine runs, the charger will detect high voltage on the starter side, and quit charging.

I would put a CerboGX to tie stuff together, and it seems to me I could use that to eventually add a temperature sensor on the alternator which the GX could use to kill the inverter, e.g. by opening the cyrix.

Looking forward to your views, spend many hours reading, but only experience makes a master, and that I lack.

Many thanks


UPDATE: A potential weak point (to be checked in real life) could be the alternator overheating when having to deliver the 1000W with the engine @ idle => low rpm => low cooling => it gets too hot and brakes. In the this setup it seems the throttling of the 1000W could only be done, by cutting ACin (4.3 A being the minimum limit) on the multiplus or switching the inverter on-off (limit it to e.g. 500W makes no sense it seems to me, as this gets below the multiplus threshold) . This would be beter manageable in a charger based system, where you could throttle.

Nicolas G asked
Nicolas G edited ·

0 Answers

Temperature sensor connected to MultiPlus-II used for LFP batteris

My all 3 units came with temperature sensors.

In one of webinars someone said that temperature sensor is not needed for LFP batteries.

On the other hand the LFP batteries should not be charged below 5C.

Can this temperature sensor be used to prevent charging of the LFP batteries below 5C?

MarekP asked
MarekP commented ·

1 Answer

Multiplus 2 - no Grid-connection possible - RCD Protect Switch


I have installed the following components and need some help, please:


The system is running fine - as long as the AC-Out is not connected to the grid.

the grid is a typical german house-installation with 3 phases (L1 + L2 + L3 + N + Earth)

The AC-IN is connected to the grid (L1 - same phase as the AC-Out)

If our electrician tries to connect the AC-Out of the Multiplus to the grid (also L1), the RCD-Fuse and the circuit braker triggers. It doesn't matter if the Multiplus is ON or OFF.


schmitz610 asked
schmitz610 commented ·

4 Answers

MultiPlus-II ESS with No AC-Out

I'm trying to work out how to add a MultiPlus-II 5000 for ESS to my existing solar installation.

I think my setup will look like the below image.


Currently I've got the Solar edge inverter and ET112 meter in place.

So I've got two questions that I can't work out (I've checked all the diagrams!):

  1. Can the MultiPlus-II provide power to my house back out through the AC-In, without having to get perform a significant re-wire of the house?
  2. Do I need a CT on the Live from the Solar Edge inverter? I'm aware the CCGX can read the data from the ModbusTCP out of the inverter. But don't know if that's sufficient.

AlexCPU asked
stenis commented ·

3 Answers

Victron ESS + ET112 = slow response


Recently I've installed ET112 grid meter on my system (which was using CT sensor previously) and I've noticed that the Multi is very slow on response to load. Currently my system looks like this:


The grid set point is set to -10W. The multi needs a good 15-18 seconds to stabilize after large load kicks in and another approx 15s to stabilize after load drops off. Check the video from VenusGX (the load is switched on at about 16s of the clip and switched of at 43s of the clip):

Is that how it should be? The difference in the load is just about 1.4kW, why is it taking so long to handle that?

Previously I was using CT Sensor extended with Cat5e cable to over 25m long, the system looked like this:


The response to load was pretty much instant. I've recorder video using the same load as on the previous one (load switched on at about 10s and switched off at 23s of the video):

The system need seconds to stabilize

Also you can see a clear difference on the Grid use graph from VRM portal:



As you can see, with CT sensor the system is very close to grid set point, with ET112 grid meter it is way off and hardly ever stay close to set point. The situation is even worst during cloudy day when PV power is fluctuating (you cen see it on my other youtube video).

Is it normal behavior? It looks like Multi can handle this load easily, the problem seems to be in the feedback from the grid meter (or algorithm when ET112 is in use). Is there anything I can do to improve this reaction time??? Please advice.

Kind Regards

Mysik asked
N-DEE commented ·

10 Answers

Mutliplus II + ET340 exporting power

Good day everyone,

I have a setup similar to this: except my single multiplus II 5kVA is setup on L2 instead of L1. There is an ET340 to monitor the phases as well as non critical loads beween the meter and AC in of inverter.

The system is setup in ESS with solar. Unfortnately it is exporting power out to the grid on instead of zeroing that phase. I have tried turning phase compensation on and off to no avail.

I have tried all the settings I can think of to try stop it. Is it because I am using L2 and not L1?

speeddemon91 asked answered ·

2 Answers

Matching Cable Lengths?

I'm looking for input regarding cable length when hooking up my Multiplus and SmartSolar.

I frequently see the recommendation to keep cables the same length. What cables does this apply to? For sure, match cables linking batteries. But what about others?

Must the POS and NEG cables from the respective buses to the MultiPlus be the same length? If yes, is there an acceptable tolerance for slightly different lengths?

I expect my longest single cable to be less than 30" long and the total path from the battery (+) to the inverter to be about 60" long. I'm wondering if short runs like this reduce the need for perfectly matched cables.

TexasCharlie asked
Kevin Windrem answered ·

1 Answer

Continous Power Drops from MAX to zero ?


my system consists of 3 x Multiplus II 3000, two MPPT250/100 (16x330 Panels each) and one MPPT250/60 (8x330 Panels).

In total I have 13kW (three compass orientations) on 3 Inverters with 8500-8700 W max.

Whenever my system reaches max power (approx. 8700 Watt), it drops down to 0 W for a few seconds, goes back app to MAX, drops again and continues this behaviour as long as it is close to max power.


The green line is the total output of the system and as you see it jumps from 8800+ down to zero again and again and again.

Is the panel power outage too high ? Do I have to / Can I limit PowerMAX of the MPPTs ?

Shouldn't this be done automatically by my Inverters ?



Gawan asked
klim8skeptic answered ·

2 Answers

Fuse needed for the MPII 5000/48V and Pylontech batteries

Im trying to find out the fuse needed for this schematic that I want to install in an off-grid


I would install 4 2.4kW Pylontech batteries.

The MPII manual suggests to install 200A fuse but I think it might be too much for this?


tpwchr asked

0 Answers

Fronius Zero feed kann nicht aktiviert werden / Fronius Zero feed in can't be activated


Nun hab ich es geschafft, das ESS System in VE-Config zu konfugurieren und im CCGX zu aktivieren.

Folgende Komponenten sind im System:
Victron EM24 RS485
Victron Color Control GX
1x Victron Multiplus II 48/3000-32
Fronius Symo 17.5-3-M
4x Pylontech US2000

Nun habe ich aber das Problem, dass ich Fronius Zero Feed-in im CCGX nicht aktivieren kann, da es dort nicht steht.

Am Fronius ist Modbus mit tcp und Sunspec int+SF ist aktiviert.

Wenn ich den VE-Bus vom CCGX abstecke und Einstellung mit MK3USB am Multi vornehme fährt der Fronius komplett mit der Einspeisung runter (Throttled), also irgendwas scheint ja zu kommunizieren.

Fehlt hier noch irgendeine Einstellung ?


I set up the ESS System with VEConfig and started the CCGX.

Components of the System:
Victron EM24 RS485
Victron Color Control GX
1x Victron Multiplus II 48/3000-32
Fronius Symo 17.5-3-M
4x Pylontech US2000

Now I have following problem, that the Fronius Zero feed in cant be activated in the CCGX because I can find it there.

Fronius is connected by Modbus and the settings are done (Modbus tcp and sunspec int+SF)

If I disconnect the VE-Bus from CCGX the fronius is throtteling to ca. 50W.







Wäre super, wenn mir hier jemand helfen könnte! :-)




Stephan Wittmann asked
jfleissner commented ·

2 Answers

Multiplus II 5kVA showing temperature alarm on LED display

As of yesterday evening i noticed that my units fan seemed to be running more often than before. This morning when running the geyser (about 3.5kW) i noticed that the red temperature LED came on after a few minutes. It has never done this before and i never had any issues heating the geyser with this unit before.

As soon as i switch off the load (or pretty soon afterwards) the warning LED goes off again. The fan is running hard when it does this but unit does not feel 'hot' to the touch although the air coming out of the unit seems a little warmer. Ambient temperature is about 20 degrees. Nothing that the unit hasnt seen before.

All signs point to some sort of overheating, i think. Would there be anything i can do/check myself or do i need to get the installer involved? Any suggestions?

dustdevyl asked
Dave Herder commented ·

2 Answers

Multiplus II shutting off grid power.

Hi, we have strange issue. We have installed many Multiplus II's but never experienced this. The multi is AC output1 is connected to a backup circuit via a changeover switch. The AC1 input is connected to a breaker on the main board. What is happening every now and then is the AC main board is shutting down for a few minutes. This turns off all appliances which are not on the backup circuit. It must be an issue with the inverter because when we turn the inverter off, this doesn't happen. Has anyone else had this issue and found a solution?



Greg Walton asked
RichardViljoen answered ·

3 Answers

Specify the phase that my multiplus II is installed on


I have a single MPII 3kVA installed in a 3phase system for basic ups hold up. I have attached it to L2 but it thinks it is connected to L1. Is there a way to tell it that it is connected to L2?

I have a Venus CCGX too.

Thanks in advance.

munga asked
Markus commented ·

2 Answers

Feature Request: Provide Support for Modbus/dbus switching of Multiplus AC-Out2 relay

I would like to request a feature request to support controlling the AC-Out2 relay in the Multiplus/Multiplus II via modbus.

At the moment, AC-Out2 can be controlled a number of other ways, but there is no modbus register address exposed to allow it to be controlled with scripts.

I am aware I can switch a GX relay connected to the Multiplus and control the AC-Out2 relay that way, but this is sloppy in that it requires extra wiring and also wastes a GX relay (of which there is only 2), and we need the relays for other functions.

Trip-Tracks asked

0 Answers

Multiplus Max AC input from generator

I have a Multiplus 3000 inverter charger and couldn't quite work out from the manual how the max AC input feature worked. I have a 3.8kw diesel generator, so I'll set the AC input limit to 3.4kw. My question is, if the multi is pulling 1.5kw(ish) to charge the batteries and I was to turn say a 3kw dryer on, would this just overload the geni or would the multi cut the battery charging current to allow the dryer to run? Or does the battery assist come into play somehow here? Would appreciate if someone could explain. Also side question, I bought my Multiplus second hand and although looks identical inside and out, the front actually says Multi-G, but can't find anything online about it, so I assume it's the same as Multiplus?

Jamie Greenaway asked
Rob Duthie answered ·

1 Answer

Multiplus Tripping Ground Fault

I've been testing my Multiplus 3000-120-12v in my Grand Design Imagine travel trailer. So far, I have only tested Output 1, since I am not connected to shore power. I have the chassis ground connection of the Multiplus grounded to the trailer chassis. The incoming shore power ground is connected to the Input Ground on the Multiplus, but I understand it is not used unless power is detected. The Multiplus Output ground goes to both load centers: (1) main and (2) shore power only. I was advised by the Grand Design technical support that the existing bare wire going to the main load center's ground bus is connected to chassis ground, so I disconnected that wire in favor of the ground coming from the Multiplus. I have tested Output 1 and I am able to run the microwave, TV, etc. from the batteries. Unfortunately, the GFCI receptacle is tripped and can't be reset. Any ideas to get the GFCI problem fixed?

Stephen Johnson asked

0 Answers

764 Posts
730 Users

Topic Experts

Rob Duthie
323 Points
130 Points
73 Points