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MultiPlus II Excess Solar

Designing a system and I have a question about how the MultiPlus II handles solar with full batteries.

Assuming AC charge connection, and the battery is full, and I have a 1200W load…. How is PV power used? Will PV power be used to power the load and given solar is not available or insufficient will it use the battery or grid to make up the shortage?

Basically I want to build a UPS type system, which has its run time extended by Solar during an outage, but during regular operation the load is offset by the solar…. Basically I don’t want the PV doing nothing whenever AC is connected.


cantechit asked

0 Answers

MultiPlus II in box


my friend has a PV plant in operation with a Victron Energy system.

Three MultiPlus II 3000/48 inverters are installed, the connection is according to the picture.

Everything is in a closed metal box. Including 2x MPPT 150/100. Battery box 10 kWh is below.

Is this implementation ok?



martin-modr asked
marekp edited ·

4 Answers

Mise en route du ventilateur malgré convertisseur non fonctionel. Multiplus II 48V-3K


J'ai installé il y a quelques jours un MPII 48V-3KVA.

Ma configuration est la suivante :

- MPII en parrallèle du réseau EDF sur l'entrée AC IN.

- Sortie AC OUT1 utilisée pour alimenter Box / NAS / Alarme et videosurveillance.

- Micro onduleur connecté au réseau EDF.

- Raspberry Pi avec Venus OS 2.92

- MPII avec firmware 500

- MPII configuré en mode ESS Optimisé sans batterie life et mise en oeuvre du transformateur de courant 50A.

Le MPII utilise bien le surplus photovoltaique pour chargé mes batteries.

Pour l'instant j'ai mis la puissance du convertisseur à 0W dans le menu ESS, le MPII charge les batteries uniquement...

J'ai constaté un comportement "étrange" du MPII lors la charge sur mon réseau augmente.

Je m'explique lorsque je consomme entre 4K et 5KW depuis le reseau electrique le ventilateur du MPII fonctionne.

Je ne pense pas que cela soit normal, le MPII ne délivrant aucune puissance...

Ai je mal configuré mon MPII ???

Je dois vous avouer que le bruit du ventilateur n'est pas des plus plaisant, surtout qaund il tourne pour rien.

Merci pour vos lumiéres.


remi-s asked
remi-s answered ·

7 Answers

Multiplus 1 12 3000 instellen nooit meer dan 250 ah

Hoe stel in de victron config in dat mijn Multiplus 1 12 3000 nooit meer dan 250 ah(ca 3000 watt verbruikt ook niet bij een piek?

200 ah lifepo4 met zekering van 250ah. Deze brand al door bij een verbruik van 185 ah ca 2100 watt. Blijkbaar zijn er piekspanningen. Hoe ervoor te zorgen dat hij geen pieken meer heeft boven de 250ah? Ik heb een 3000 multiplus en ik wil niet naar 400ah batterijen met bijbehorde zekering.

Wat me ook opvalt is dat de multiplus 37 watt verbruikt als hij alleen maar aan staat. Hoe stel ik m in zodat hij minder verbruikt?

Dank u wel :)

jules-pieter asked
djsmiley edited ·

1 Answer

Gestion borne de recharge véhicule en site isolé


Je souhaite acheter la borne de recharge EV Victron pour ma voiture.

Je me permets de vous envoyer ce message avant, afin de savoir si cette borne correspond à mes besoins, pour optimiser le fonctionnement de mon installation.

Mon installation comprend :

1 Cerbo,

1 multiplus2 / 48 / 10 000 (8kw utile)

10Kwc de pannneaux (tous sur la partie DC),

2MPPT 250/100,

1 parc 48v de 4 batteries UNITECK 220A qui est bridé à 55A de recharge (paramètre DVCC).

Cette installation est monophasé et fonctionne en UPS : « site isolé ».

Mais, le générateur sur AC IN : c’est le réseau de distribution public EDF.

C’est le Cerbo qui défini : démarrer/arrêter un générateur.

Voici mes interrogations sur le fonctionnement de cette borne qui sera relié sur AC OUT 1 :

Lorsqu’elle est connectée en wifi au Cerbo, en mode automatique :

  1. Comment va t’elle fonctionner ?

1.1) modulation de la production photovoltaïque = modulation automatique et instantanée de l’intensité de la borne EV ?

Exemple : lorsqu’il y a quelque nuages dans le ciel.

1.2) Augmentation des charges sur AC OUT 1 = diminution de l’intensité de la borne EV ?

Exemple : la maison consomme 5kw / la production solaire et de 8kwc / la SOC du parc est de 100% : il reste 3kw de libre. La borne va t’ elle se régler automatiquement et instantanément à 13 ampères ? (13x230=3kw), puis revenir à 32A lorsque les charges auront disparu ?

2. Peut-on interdire à la borne EV d’utiliser l’énergie du parc de batteries 48v ? Ou définir un seuil à partir du quelle la borne peux utiliser les batteries ?

Exemple recharge du véhicule uniquement si la SOC>90% ?

3. Peut-on paramétrer la borne EV pour recharger le véhicule à la puissance maximum (32A) lorsque le générateur est allumé ? Sur mon installation, au moment où le multiplus2 bascule sur le réseau de distribution public EDF.

Exemple : Terminer la recharge de la voiture la nuit

pwacquiez asked
davidv commented ·

3 Answers

Quattro II - Wrong advertising promise or misunderstood ESS with generator?

Hello friends of the blue devices,

is there a false advertising promise from Victron?.

I bought 3 Quattro II, a Cerbo GX and 6x MPPT 150/70 VE.Can. Then I installed 14kWp PV and a 11kWh battery with diyBMS. Everything has been going great for about 2 months - except for the advertising promise with the generator.

Of course I installed the ESS Assistant in all 3 Quattros - there's no other way if you want to use the PV power yourself and want to store excess power in the battery. My 8kVa generator with Honda motor and AVR on each phase is connected to AC In1 as the owner's manual recommends.

Germany with internal NS protection is set as the grid code. LOM activated at AC IN 1+2. The generator is not recognized. LOM disabled at AC IN1 - nothing! Then I found that the generator is set to 52Hz, so I set it to around 50Hz - the generator is recognized after a very long time and serves phase 1+2+3. But no charging of the battery - which is the most important thing for me. After this connection was not stable either, I switched to EXTERNAL NA protection. This keeps the generator stable in the system. However, there is no PowerAssist and no support from the Quattro II inverter.

IF I suddenly switched on 4000W the Quattro II throw the generator out of the system again. I only want to charge the battery with the generator and the other consumers as before with an inverter using MPPT and battery power. So as if the grid is available on AC IN2 and no generator is connected. It works there too. I've tried everything with the generator - minimum SOC set to 100% or always keep the battery charged - all the setting options...nothing. You can only use the generator to operate connected consumers in the house without any support from the QUATTRO II. That sounds somehow different in the advertising. It doesn't say "all this will only work with your generator if you don't install an ESS". Then I should have saved a lot of money and would have bought 3 Multiplus II and 3 additional power supplies with a total of 7kW to charge the battery with the 3-phase generator.

Is there someone among you who knows more about this and can help me?


mrfrodo asked
djsmiley commented ·

12 Answers

one RS450/200 or better split to 2x RS450/100

Hello guys,

i have a questrion regarding the purchase of RS450 equipment. Is it better to use only one RS450/200 or better split to 2x 450/100?

I was told, that it is better to use the 450/200, when various directions of the panels are used (N, S, E, W), because the 450/200 limits the output of the power over all 4 mppt trackers to 200. If 2x 450/100 are used, it could be that 2 mppts of the first 450/100 produce 120A and will be reduced to max 100A and the second produces 80A... so i can load only with 180A. When I use the 450/200 in the same constellation i would charge with 200A.

Is that true?

which setup would you advice?

Best regards


ice77 asked
ice77 answered ·

2 Answers

High charge current alarm

Hello, hoping someone can advise me with a High charge current alarm.

I have an off grid system

Fronius inverters

Victrion multi plus

and Pylontech battery's (30kwh useable)

The problem I am having is when the Batteries are full and my inverters are restricting the power off the roof until a large load is being used (e.g kettle) then the inverters step up to provide for the load.

Once the load is switched off the power is diverted to the already charged batteries causing "High charge current alarm"

any help would be appreciated (-:

alexanderr asked

0 Answers

Random loss of AC out1 - why?


Had this about 4 times over the past 3 months, the most recent being this afternoon. It lasts enough time to make things beep and clocks reset.

2 x MP2 48/5k - grid on ACin all loads on ACout1

6 x US5000

Running from batteries, pulling about 4kW today but in the past (about a month ago) it has been at night with about 500W.

I currently charge at night and discharge in the day and SoC today when it happened was 84%

I got no loss of grid alarm or any other alarms but when I looked in the data from VRM I see some odd values at the same time.


Why does the output voltage phase 1 drop to zero as this would appear to be the problem especially as I am pulling nothing of interest from the grid - which is aparently disconnected.

I have coincidentally been stood by the inverters during an actual grid fail and I heard the relays open and close, but nothing this time as I was in earshot of them (could be mistaken) and when I checked with the neighbour they had no issues (but they might be on a different phase) so this time it does point to the ACout being a problem not the ACin.

Even so, can anyone explain why the ACout drops?

rata1 asked
rata1 edited ·

6 Answers

BSLBATT voltage too low

Hi, I have a newly installed MP-II 48/5000 with 3 x BSLBATT B-LFP48-100-RM in ESS configuation. The system is working, but isn't performing well as it goes into Sustain mode when at around 50% SoC with only a modest discharge current due to voltage dropping below 48V.


When freshley charged, the battery is only just hitting 51V, and quicjly drops down. I am not convicned my Charger settings are correct, they are:


and accoring to the Victron manual they should be


Should I change the charger settings to match Victron's manual?

Many thanks

h-copter asked
nickdb commented ·

4 Answers

Multiplus GX 3000/48V ET112 et micro controller enphase


je viens de faire l'installation de :

- mutliplus II GX 3000/48

- 8 micro controller enphase, branché sur AC IN

- 2 batteries polyntech

- 1 compteur ET112, branché en tête de compteur

tous focntionnement presque, sauf que je n'arrive pas à charger les batteries. Le compteur detecte la production des panneaux (avec -xxxW) mais cela ne déclenche pas la charge. voir impression d'écran.Screenshot_20230119-132421 (002).png

Est-ce qu'il y a des paramètres que j'ai mal réglé?

ou est-ce qu'il faut que je mets les micro onduleurs sur AC OUT?

Merci de votre aide,


nicolas-nay asked
myshopsolaire commented ·

3 Answers

Multiplus UK G98 G99 non-compliance update

Dear Victron,

It seems very likely, from the email below (names and some details omitted) that the docs you submitted to ENA in early October will not be sufficient to gain compliance "due to important information being either incorrect or missing altogether".

Please could you provide some kind of timescale for when you will be able to provide updated documents? I note that NGED are, helpfully, willing to liaise with you in order to speed up the process.

Providing a response on this forum would, I'm sure, be very welcome by customers like myself.



Good afternoon,

I have been asked to contact you, to explain the current compliance status, with regard to ENA EREC G99/1-9, for the Victron Multiplus II 48/5000/70-50 and Victron Multiplus II 48/5000/70-50 GX (which share a common compliance report).

As you may already be aware, as of 1st September 2022, any device that is recognised as an Energy Storage System (ESS) had to meet the full technical requirements of ENA EREC G99/1-8 (and subsequent revisions), where they were previously exempt from some of the newer requirements, that were introduced by the European Network Code: Requirements for Generators (RfG). This requirement was communicated well prior to September 2022, and was published in EREC G98/1-5 and EREC G99/1-7 in August 2021.
Many manufacturers pre-empted this change, and made their ESS compliant before need. Others waited until the deadline to submit renewed compliance documentation.
Where an ESS device had not met the requirements on 1st September 2022, it was marked as ‘non-compliant for new installations’, by WSP, in the ENA’s Type Test Register, and manufacturers were pushed to renew their compliance documentation.

The ENA, WSP and DNOs have the authority to determine Generating Unit compliance under (to name just one document, to avoid confusion) ENA EREC G99, which is an Annex 1 document of The Distribution Code of Great Britain (DCode).
DNOs have a statutory obligation (and licence condition) to abide by the DCode and (in particular) its Annex 1 documents.

As the Victron Multiplus II 48/5000/70-50 (ENA Type Test Register reference: VICEN/02689/V2) Energy Storage Device’s current status is ‘awaiting assessment’, in the ENA’s Type Test Register, I have conducted an in-house assessment, in order to provide our customers with a response sooner than we would be able to if we were to wait for WSP’s assessment. My assessment is based directly upon the requirements within EREC G99/1-9 alongside prior assessments by WSP (what they will be looking for), and my own experience.

I have assessed the Victron Multiplus II 48/5000/70-50 and Victron Multiplus II 48/5000/70-50 GX as being ‘non-compliant’ with ENA EREC G99/1-9, as things currently stand, due to a number of shortfalls in the compliance form. As Victron have made their form publicly accessible, via the ENA’s Type Test Register (i.e. it’s not a restricted document), I believe that I can elaborate upon this:

Advisory and failure points:

[information which could be considered commercially sensitive omitted]

Hopefully, you will be able to see that this compliance status has not come about due to minor inaccuracies, which could be forgiven, but due to important information being either incorrect or missing altogether.

As a consequence of these findings, National Grid cannot accept the connection of the Victron Multiplus II 48/5000/70-50 or Multiplus II 48/5000/70-50 GX, in parallel with our Distribution Networks, until such a time that Victron have provided alternative or additional information that demonstrates compliance with the latest version of ENA EREC G99.

I am comfortable with you informing Victron of the above, either directly or indirectly (through your equipment supplier), so that they may complete and provide alternative or additional evidence of compliance. They should do so primarily to the ENA, but National Grid Electricity Distribution would also be willing to take an early look at any documentation, should Victron see this as desirable.

I am confident that, given time to complete the documents accurately, Victron will be able to make these devices compliant (perhaps with another firmware update) but, unfortunately, we will have to wait until they have demonstrated this before we may accept these on our networks.

Kind regards,

Engineering Policy

johnone asked
stefmari commented ·

18 Answers

Can Multiplus read Battery voltage and temperature from Cerbo GX?


My setup is constituted with DIY LiFePo4 battery bank, a SmartShunt, a Cerbo GX, a MultiPlus II and some MPPT. I'm in the middle of setting all this up...

And unfortunately, I have forgotten to wire the battery voltage sense wires and temperature sense cable between the battery and the MultiPlus. A wall is separating the battery and the MultiPlus II, and it's quite cumbersome to have to wire additional cables.

A Ve.Bus cable is wired between the MultiPlus and the Cerbo GX.

Can the Cerbo GX share the battery voltage and Battery temperature reading (both read from SmartShunt, wired in Ve.Direct) with the MultiPlus, so the charger and inverter knows these values and works efficiently?

fguiot asked
fguiot edited ·

3 Answers

Multiplus ii firmware update & configuration without batteries

I have a brand new Multiplus II 48/10000 and would like to update the firmware and configure before my 4 PylonTech batteries arrive. I have searched for and read a few Q & As on the subject.

The Victron videos indicate that this is possible using either AC in or 48v DC. I wanted to minimise risk and use a low value MCB for setup, connect up my laptop and USB interface and away we go. There seem to be differing views on whether the AC in only option will work

I have only AC in connected (100A cables) and earth from my adjacent consumer unit.

I initially connected it to a 16A Type B MCB and the MCB tripped after a few seconds whether in position I or II

I have read that there is an initial rush of current to charge internal smoothing capacitors, so I get that.

I repeated using a 50A MCB (not unreasonable given that a 100A MCB is recommended to match the Multiplus's 100A throughput capability) and this time the MCB and RCD (80A 30mA) both tripped after about 15 seconds.

Is my only choice to wait for the batteries to arrive ?

Is there something else I should try ?

Does it make a difference if I start up in charging only (position II) of inverter (position I) ?

Alternatively does this suggest there is a problem with the inverter ?

How many volts of DC would it require to fire up the DC side as I have a number of smallish LiPo batteries of different sizes that I could use ? I also have a 12v lead acid accumulator ?

Any help would be appreciated


carrpet asked
nickdb commented ·

6 Answers

Multiplus over temp

Hi is there anyone who can help?

we have a Victron multiplus 48/3000va 230volt inverter/charger, I have read that over temp can reach up to 65c, our inverter only reaches 40c and over temp warning alarm is activated, what would be the recommended generator auto start setting that would be used?
currently I have ours set at 60seconds after this warning is activated but think it could be extended, I have shone a laser temp on the side of the case but temp doesn’t seem to increase dramaticall, have removed protection lid for better ventilation and also placed a Ruuvitag temp onto the top to monitor temp.


Alan asked

0 Answers

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