multiplus ii Image

multiplus ii

This topic was merged into Multiplus-II

Multiplus not bulk charging

Hi. I have a new install MP2 3kVA with victron gel batteries (4 x 220AH in series).

I did an initial discharge test down to what the system believed was 70% or 48.9V.

When I cut back power, the charger went straight into float, not bulk.

It has slowly charged back to 85% and is now in storage mode.

Any ideas why it would not have bulk charged?

Should I just run another (longer) discharge cycle and see if it corrects itself?

nickdb asked
heinvdb commented ·

3 Answers

Battery protect 220A, voltage drop

Have a BP 220 unit. IN-pin connetcted to plus on Li bat with fuse inbetween. Also connected to IN-pin there is a multiplus and a smart solar connected.

When I add load through the BP I got voltage drop when turning on smal consumers from 13.4 to 12.9v (lamps). When using bowthruster och windlash the system shuts down totaly.

If I remvoe the BP everything works fine, what is the problem?

I have bought a second BP and I got the same behaviour with that one.

Best regards


kim-hilding asked
jbakuwel commented ·

2 Answers

Dual Victron Multiplus, same battery bank, separate AC out.


I need some assistance. I´m installing a setup composed of a battery bank (lithium), 2 smartsolar MPPT, 1 Cerbo GX, two Multiplus II - 48/5000. (240VAC)

The system is installed and it is working fine, but I can´t find a way to only have one inverter/charge working. I understant that when configuring the inverters in split/parallel/three phase, if one shuts down, the other one also turns off.

But one this case, I don´t need to combine the power of both inverters. I have the AC-out´s connected to a swich on the AC switchboard in which we use either one inverter, or the other. So we would like to use the inverters as indepent as possible.

Right now, I have them connected to the Cerbo GX, each with their own VE.BUS cable. I´ve tried chain one VE.BUS cable from one inverter to the other and then to the Cerbo GX, but it is the same, I cannot use one inverter without the other.

Is there any workaround to this? We just want to have more redundancy with the setup, we don´t need to have the combined power of the inverters.

nuno-silva asked
nuno-silva commented ·

2 Answers

Multiplus II 48V 3000W - Damaged Interference Suppression Capacitor






Please help me understand whether replacing the capacitor MKP62 305~X2 225K 40/110/56/B can restore this inverter. The capacitor was damaged by a short circuit on AC IN during heavy downpour accompanied by several lightning strikes.

The adjacent toroidal inductor sparks and the inverter goes to error mode.

The fuse is ok and the line has continuity.

Any top and underside PCB photos of undamaged inverter for reference will be highly appreciated.

Sample photos attached.




lawrence-1 asked

0 Answers

How to calibrate the AC Current Sensor Zero to 0


I just installed everything and the system works great.

In order to read out my PV power (parallel to grid) I ordered he AC current sensor, connected it to AUX 1 and run the Assistent.

So far OK. It's displayed on the remote console and show values (tested with a 1000W heater)

DIP setting is all off (1.5kw on 230V)

But if I turn off he load, the reading is still above 80W.

Looking in the device it shows 240V 0A biu 84W ???

How to adjust the Zero Point?


Thanks for reply


mucwendel asked
elliott123 answered ·

4 Answers

MultiPlus II ESS without neutral in Belgium

I have a MultiPlus-II configured as an Energy Storage System. The charge/discharge cycle is done via ModBus-TCP. Here's how the power/voltage graph looks over time:


As you can see above, all was working fine, until the utility company decided to do (unannounced) work and all grid power went down. After power was restored, I no longer had a Neutral wire.

The MultiPlus-II is connected to a "monofase" connection. Below is a measurement on my "monofase" connection with 2 wires coming in from the grid. As you see, in stead of 1F+1N, I now have 2F wires (120° out of phase of each other) coming in.


There is still 230V between both wires. However, some devices, including the MultiPlus-II ESS stopped working... Can the MultiPlus-II handle this kind of (old-school) 2 phase (no neutral) grid connection? If yes, how to (re)configure?

Side information: I also measured at a neighbouring grid connection with 3 wires coming in from the grid. It look like this:


It clearly shows 3 phases on prove #1, #2 and #3. Probe #4 is connected to a 4th wire, but that 4th wire is not connected inside the (sealed) box of the grid company.

bjorn-n asked
bjorn-n answered ·

1 Answer

unexpected Inverter shutdown


after running several months with no issue at all, the MP II swicthed off and no message appeared on the GX not the VRM alarm log. Later i discovered irregular behaiviour of the SOC coming from the BYD BMS (a call to EFT is already opened) - nevertheless, i would expect some sort of logging from the MultiPlus II about that - any other location/source i could look at ? The only change within the last 2 weeks was updating the GX to 2.60.

best regards,


martghh asked
pipahaha commented ·

0 Answers

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
jerothle answered ·

2 Answers

Multiplus 2 and Pylontech US 2000 Plus usable without GX device?

I have an off-grid system with a Multiplus 2 , two Bluesolar Mppt 150/35 and 8 Pylontech batteries US2000Plus. Yesterday the Color Control GX stopped working (first it showed wrong values, then I tried to reboot but it remains with the "Victron Energy" start display).

As the Mppts stopped to charge I disconnected them from the CC and reset them with the parameters for Pylontech batteries. Now they charge correctly, short time after 100% SOC they change to absortion modus, and the Pylontechs go standby when fully charged and if there´s no load. Also the Multiplus works properly.

Can I continue to use the system in this way without any GX device or should I better shut it down until the new CC arrives?

hiaslgruber asked
Matthew Walsh answered ·

2 Answers

New MultiPlus-II 2X 120V doesn't show full AC load on Victron Connect

I just installed the new Multiplus-II 12v 2x120 inverter. It's working great but the data I'm seeing in Victron Connect doesn't look right. For example, I'm on 50amp shore power and with one 15k A/C running in my RV, Victron Connect shows AC Loads at 231w. When I shut that A/C down, the load stayed at 231w. When I start up the second 15k A/C unit, Victron Connect shows 1,868w. It appears Victron Connect isn't seeing power from one of the legs on my 50 amp service. Thoughts?

bertschb asked
cory cantrell commented ·

2 Answers

On AC power Cerbo GX not properly registering AC consumption from grid.


Dual Multiplus-II 3000/12/50a 120x2 in parallel

Cerbo GX with GX Touch.

I have the rooftop air conditioner running a few TVs on and some lights. But am only reading (as you can see in the photo 248w. I can also turn on the microwave and a heater and it doesn’t seem to change much. How can I get the AC to show proper usage?

Thank You in advance.

cory cantrell asked

0 Answers

current sensor without dipswitches - multiplus ii way off

Can someone please explain how it is suppose to work.

I have in assistant added current sensor.

In console i get a pv icon showing watts.

But its right now showing 2000w but its nothing in that phase now. evening and the sun is down.

If i unplug it it shows a value any way.

tried everything i can think of.

How it is suppose to work?

johnny asked
johnny answered ·

2 Answers

Mulitplus II 48/5000 tripping RCD

Hi all,

I wondered if any can help me on this one...?? I am a bit of a novice on electrical matters and so, i would appreciate you taking things a bit easy on me (for all you experts out there!!)

I have an AC feed in from the house to a RCD and then through a 20A breaker to my Multiplus II 48/5000. I am using the earth from the house mains to a busbar. The casing of the multiplus is connected to the earth busbar. AC In setting at 16Amps via VE Config. Battery cable is connected. the AC Out cable is also connected and fed back into the house as a second ring.

When I flick the Mains In RCD (30mA)switch, it trips it immediately? I am not 100% sure what the problem is but possibly too much leakage from the earth coming from the house?

I am considering purchasing an earth rod and set up a different earth circuit and connect the earth from the rod to the Multiplus and also for the casing earth.

My questions then are:

1) Does anyone have any idea why the RCD is tripping immediately?

2) If I use the earth rod and connect the earth from there to the multiplus (AC In) and also the casing earth, what do I do with the earth cable from the Mains AC In cable?

3) I have considered another RCD - perhaps 120mA but, I have been inform that 30mA should be fine.

I would appreciate any ideas, answers and feedback that you have.

Many thanks !

trungt asked
Rob Duthie edited ·

1 Answer

Multiplus 12\3000\120 output frequency 45hz

Just installed a multiplus 12v 3000w to 120AC inverter charger on a boat. I'm using the mk3-USB interface to adjust settings. The inverter output frequency is set to 60hz, but its showing only 45hz on the output. This happens when running off 12v 500ah house battery bank. Please help!



louise asked
cyberhom commented ·

2 Answers

Victron Multiplus 5000VA 48v conversion to accept 24v battery banks

Hi all,

I have had this system in about 4 years now, I really want to move over to lithium battery system however it's too expensive for me to do so on a 48v system.

What options do I have to convert the battery output from 24v to 48v with an inverter. I am aware this will effect my AH output of the battery system too.

Thanks in adavance.

Dale asked
Carlos Carvalho answered ·

3 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
erthyp answered ·

2 Answers

Multiplus in ESS mode aansluiten op Belgisch net voor thuisbatterij.


Ik heb thuis een multiplus II GX aangesloten op het Net met een 10Kw lithium batterij.

Alles in mooi aangesloten zoals het in de manual beschreven staat en het systeem werkt ook gewoon perfect, Maar nu is de keuring langs geweest om het systeem te keuren en dat wilde hij niet doen omdat de omvormer in serie was aangesloten met het electriciteitsnet en niet in parallel. (Ik vertelde hem dat dit systeem enkel maar in serie kan worden aangesloten en dat alle meet apparatuur vanbinnen in de multiplus aanwezig is, en dat dit toestel aan alle veiligheids voorzieningen voldoet en gekeurd is door Synergrid belgie)

Kan iemand mij helpen met info of voorbeelden van iemand anders die dit ook zo gedaan heeft thuis, zodat ik dit kan voorleggen aan de keurder? Of heb ik zelf iets over het hoofd gezien?

In bijlage de schets van hoe het is aangesloten:



Met vriendelijke groeten


aaroncloet asked
Daniël Boekel (Victron Energy Staff) commented ·

6 Answers

Leaving MultiPlus voltage sense connected when battery disconnect switch is OFF.

I'm building a portable-ish system with a MultiPlus 24/3000. The main switch on the MultiPlus will not be easily accessible. I'll have the positive line run from the battery thru a disconnect switch on its way to the MultiPlus. The negative directly from battery to MultiPlus. The disconnect switch will be in the OFF position for weeks at a time.

I'm going to hook up a separate smaller cable to the voltage sense terminals on the MultiPlus. I am planning on hooking the voltage sense cable directly to the battery terminals (not the disconnect switch) but I want to know if it is ok to leave the disconnect off while the voltage sense cable is connected.

Is there a problem with this? Is there a little current flowing on the voltage sense cable even with the disconnect switch OFF? If so, how much?

krby asked
raymiller answered ·

2 Answers

FEATURE REQUEST: Distinguish Grid Loss from Grid Rejection

When a Multi / Quattro rejects the grid because it is non-compliant, VRM reports a Grid Loss.

Strictly speaking, the grid is still there - and as my clients would say, "The oven still works, why doesn't your inverter?!". So, I suggest this be distinguished from a Grid Lost alarm and be reported as Grid Rejected. This makes it easier for us to explain to clients that the grid is not up to scratch and help them understand why their essentials are running on backup while the non-essentials are using the grid.

This is especially with the MultiPlus-II that implement local grid codes eg. NRS-097 in South Africa.

warwick asked
raymiller answered ·

1 Answer

Multiplus 48/30003/35-50 charge voltage to high for pylontech 2000C


I have an Multiplus 48/3000 connected with a Pylontech 2000C, Cerbro GX and mppt 150-35.

Everything is connected to the Cerbro. The chargeing with the Mppt workes fine. If I connect the AC in with the grid, then I get Overvoltage warning for the Pylontech at the Cerbro Gx.

In the settings for the multiplus in the Cerbro GX are no settings for the voltage of the battery.

Best regards Oli

dl1oli asked
dl1oli edited ·

3 Answers

What does "Max AC current 100% of INom" stand for in the VE configure?


what does "Max AC current 100% of INom" stand for in the VE configure?


Missing information in the help system.

Maybe someone has detailed information on this.

Sunny regards


Thomas Heins asked

0 Answers

MultiPlus II 48/5000/70-50 mit Einspeiseberenzung, Scheinleistung > 4,6 kVA


kurz vorweg meine Anlagenkonfiguration.

Module von Q-Cell:

Ost (Neigung 10°): 6 x 390 Wp = 2340 Wp

West (Neigung 10°): 6 x 390 Wp = 2340 Wp

Süd am Giebel (90° ): 4 x 390 Wp = 1560 Wp

3 x Victron Laderegler MPPT 150/45

1 x Victron MultiPlus II 48/5000/70-50

1 x Cerbo GX

1 x EM24

2 x Pylontech US3000C


Alle Systeme haben die aktuellste FW.

Die Anlage wurde mit meinem Elektriker nach meinen Wünschen vorbereitet. Die Abnahme vom Netzversorger steht bald an.

Jetzt komme ich zu den offenen Punkten:

Der Multiplus wird nur über die L1-Phase Strom an der Netzbetreiber übergeben. Hier gibt es evtl. ein Problem mit der max. Scheinleistung SEmax von 4,82 kVA. Erlaubt sind nur 4,6 kVA.

Parallel gibt es die 70% Regelung (Wirkleistungsbegrenzung). Dieses würde bei meiner Anlage 70% von 6240 Wp sind 4368 Wp.

Mit welchen Einstellung kann ich die Begrenzungen einstellen, so das auch der Netzbetreiber hiermit zufrieden ist?

Hierbei gingen meine Überlegungen an folgende Einstellungen:


Ist das richtig?

Warum steht "Feed-in limiting active" auf No? Ist irgendwie irritierend.

Ich hoffe mir kann jemand weiterhelfen, der hiermit Erfahrung hat.

Viele sonnige Grüße

Thomas Heins

Thomas Heins asked
Thomas Heins commented ·

2 Answers

Maximum Charge Voltage (DVCC - Limit Managed Charge Voltage)

Good morning Victron Community,

I've noticed the addition in DVCC the ability to limit the managed battery charge voltage to a value of your liking. The way I understand it is the ability to override the BMS CAN CVL (charge voltage limit) value from the battery and to charge at the selected voltage specified in DVCC.


For this particular site we are using 2x Revov R100 batteries which are set up with CAN comms between the battery pack and Multiplus-II 5kVA. The battery's parameters are set up to charge at a CVL value of 55.5V as seen below


however as a test I've lowered it to 54V in DVCC (and KEEP BATTERIES CHARGED) BUT I see that although it is trying to be close to 54V charging it still goes above that at 54.51V and triggers a High Voltage alarm on VRM (see below):



VEConfig file is also set up to charge at 54V for both absorption and float for this test (just noting as extra information).

Question for this post: Any ideas why this 54V limit is not holding?

Although the end result doesn't affect the batteries (safe voltages) the alarms in VRM are the problems.


chrisawp asked
Vangelis Beligiannis edited ·

2 Answers

Multiplus 12|3000|120 AC-Out-1 wire size

I just want to be sure that I am getting this right. When running the AC in or out wires my inverter will be 32 feet from the breaker panel/box. Will 6/3 wire be enough for that length?

rporcoro asked
Kevin Windrem answered ·

2 Answers

Is Multiplus II 3000/48V 35 capable of transferring 45Amps?

Hi, can anyone explain max current the Multi is capable to transfer. The manual says:


I have opened the Multiplus case and I see only 32 Amps relays there:




From the photos above you can see there are only 32Amps relays. I think the relays will blow up in the case the Multi will add its 13 Amps to the 32Amps on AC-In.

Is the manual stating wrong numbers? I have searched the specs of the relays and it seems they are not able to handle 45 A even for short period of time.

Can someone explain why the 32 relay is used when Victron declares that it should handle max 45 Ams? How to size the circuit breaker here? I think 32A circuit breaker should be enough in the case 32 Amps relays are used internally by Multi.

Roman Štembera asked
Roman Štembera commented ·

2 Answers

Batteries apparently losing charge on light load

This is a new installation set up using default settings on smartsolar and multiplus II.

When first connected, Colour Control GX showed battery charge at 85% if memory serves. Over the course of three weeks, battery SOC indication has dropped to 30%. Apart from two very brief higher load scenarios (vacuum cleaner for 5 minutes and fridge freezer for 2 hours) the only load has been the base load of about 5-7W (according to colour control).

Colour control is recording voltage of 55+ Volts on the 48V AGM 230Ah battery bank (confirmed by meter on the battery terminals), so the smartsolar will not do an absorption charge for very long (1 hour on default) before reverting to float.

As I write this, it is 11:32am, bright sunshine, and VRM is recording a 9W AC load, batteries idle 11W, SOC 29%, 55.4V and current 0.2A, and PV charging at 50W.

What am I missing?

20871pault asked
20871pault answered ·

3 Answers

MultiPlus II overload on grid failure

I have a MuliPlus II 5kVA 48V which I installed to mitigate regular load shedding. The system has been idle for about 6 months after which it has had a trial by fire of about 20 events in the course of 2 weeks. It handled everything great except for on 2 occasions where the MultiPlus tripped and reported an overload as the grid failed. In both cases the load was minimal at the time of the trip +- 200W. In both cases I reset the system and reconnected the exact same load and the system came up fine.

Can anyone explain how this can happen? Is it possible for the grid itself to cause something that is reported as overload condition?

A portion of the cable run that feeds the Multiplus power from the grid shares a conduit with the cables that return power to the house. Could this be an issue (ie an induced eddy current)?

Thank you.

Enrico Zanolin asked
Guy Stewart (Victron Community Manager) commented ·

8 Answers

Why is the input current limit changing the PV Charger (DC Current) during feed in

Why is the input current limit changing the PV Charger (DC Current) during feed in, if I am using a number less than 7?


Multiplus II 48/3000

3 x Pylontech US2000

SmartSolar 150/35 with 2.1kw PV

Venus GX


AC coupled PV with 10kw

joe2 asked
joe2 answered ·

3 Answers

Battery needed?


I am about to install a mp-II 5000/48 and a Smart inverter RS 450/100.

I was wondering if a battery is needed before the system will work?

The system is grid parallel

I Will wire the 48v terminals to each other, until battery and busbar arrive.

m1kkel asked
alan commented ·

2 Answers

Maximum power inverting multiplus II 5000

Hello, I have a multiplus II 5000, and I see that the maximum power from battery is 3500w, is it fine? Thanks in advance


palom170 asked
palom170 commented ·

2 Answers

1075 Posts
31 Users

Topic Experts

There are currently no experts identified for this topic. Can you answer questions in this topic area? Community members who provide answers that are marked as correct earn reputation and may become recognized as topic experts.