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Multiplus II ESS error 11 when generator is connected


ESS Assistant (Europe)

Multiplus II 24/3000/70, Cerbo GX, MPPT 100/50, SmartShunt, LifePO4 210Ah 24V batteries

Feeding to Grid is not allowed

My idea was to install a automatic switch on the Multiplus input to switch between the grid and generator in case of grid failure.

The issue is that Multiplus gets an error

Error 11: Relay test fault on VE.Bus System when generator is connected to the input

Any Idea how to solve this issue?

mindaugas asked
mindaugas answered ·

2 Answers

How to connect MPPT 450/100 + LG Resu + Cerbo GX + Multiplus 2

I am trying to create a system that will save energy from solarpanels to my battery and also sell the energy from battery to the grid. I have followed the instructions regarding installing the LG Resu battery to the Cerbo GX. But when doing so, the MPPT "disconnected" (both the battery and the MPPT was connected to the VE.Can bus on the Cerbo GX). I have read the ESS instructions and other blog post. But I cannot get it to work. My questions are:

- Where do i connect the RJ45 cable from MPPT in the Cerbo GX? The instruction for the LG Resu battery tells me that I have to connect it to the VE. Can bus and then the MPTT "is disconnected".

- Which settings do I have to change to make it work?

Here is a picture of the current status of the installation.



flex-max asked
nickdb answered ·

1 Answer

Multigrid 48/3000/35 replacement

Hi Victron,

We are looking forward to replacing our Victron multigrid 48/3000/35 due to faulty. Because this product is discontinued and we could not find anywhere in Australia.

Could you please give us a solution of replacing our inverter? Thinking of using Multiplus II but it is not in CEC approved list for using in Australia.

Could you please advise which Victron inverter that we can replace in our system to be compliant with Ergon Energy?

Best regards,


prue asked
prue answered ·

2 Answers

mots de passe multiplus 2

rebonjour je repose ma question vue que la personne technique de chez victron a pas put resoudre mon probleme je recherche le code pour renisialisation vitron multiplus 2 et grid pour modifier le service technic ma donner un code mais marche pas !!! il me dit mauvais mots de pass donc il comprend pas !!!!

cali-clim asked
Thierry Cortassa (Victron Energy Staff) answered ·

7 Answers

Fehler im Dashboard

Bei mir werden im Balkendiagramm (Dashboard) die PV Erzeugung und der Stromverbrauch nicht saldiert. Im CCGX stimmt alles. In der Erweiterten Ansicht (Systemgrid) wirds auch richtig saldiert angezeit.

z.B. Juni 2019 Stromverbrauch, mit Netzbezug.


Gleicher Zeitraum im Systemgrid, kein Netzbezug.


Das gleiche Spiel bei der Einspeisung, im Winter wenn nichts von der PV kommt, habe ich Einspeisung weil die Phasen nicht verrechnet werden.

Ich hatte damals Kontakt mit Victron Deutschland, hier hies es, es wäre ein Installations Fehler und ich solle mich an Service Team Döbeln wenden. Die hätten aber gerne eine 4 Stellige Summe gehabt, auch wenn sie das Problem nicht lösen können. Mittlerweile kenne ich jemand mit dem gleichen Problem, der die Anlage von Service Team Döbeln hat. Ok die bekommen das selbst nich richtig auf die Reihe.

In Holland hatte ich dann Kontakt mit Herrn Boonstra, er kannte das Problem mit dem Balkendiagramm und vertröstete mich. Das Problem sei bekannt und sie arbeiten dran.

Jetzt sind 2 Jahre vorbei, meine letzte Anfrage vor 14 Tagen ob es nun schon eine Lösung gibt, wurde nicht beantwortet. Kennt jemand einen fähigen Kontakt in Holland?



stromsparer99 asked
michael-neumann commented ·

12 Answers

MultiGrid don't use MPPT when battery reached 100%

In my ESS-system a Fronius Symo 8.2 is at AC-in and a MPPT250/100 at AC-out. When DC feed-in is disabled and the battery has reached 100% no power comes from MPPT but all from the Fronius.


Only when the Fronius no longer supplies sufficient power does the MPPT switch back on. This is how I lose feed-in remuneration. Is it possible to prefer MPPT-power for critical loads?

maha asked
martghh commented ·

1 Answer

DVCC limiting charging current - Multigrid, Venus, MPPT, Fronius and Pylontech

I`ve got an problem with DVCC on while charging the batteries. My system: Multigrid 48/3000/35-50 with Venus GX and two connected Pylontech US2000 Plus. A BlueSolar 150/35 is DC- connected to the Multigrid. My Fronius Primo 3.0-1 is AC- connected to the output 1 of the Multigrid. The gridmeter is an ET340. The system work fine. But if i activate DVCC the charging current will slow down to about 20A and the excess of energy is load to the grid. If i deactivate DVCC the full energy (about 30A) is load to the batteries. I want to load all the energy to the batteries. All firmware is up to date. Whats the problem?

moeterxl asked
alexander-uhde commented ·

4 Answers

Mutiplus mit grid

Hallo zusammen,

ich habe ein Problem den Multiplus richtig einzustellen. Versuche es jetzt schon tagelang ohne Erfolg.

Ich habe einen Multiplus+ cerbo+ MPPT von Victron + Batterie.

Einstellung ESS

Der Multiplus soll wenn die Batterie voll ist und freigegeben die Batterie nehmen und damit AC Lasten abdecken. Geht soweit.

Wenn aber die Batterie leer ist soll er einfach Strom aus dem Netz nehmen.

Es wird aber immer die Batterie zu geringen Teilen dann wieder voll geladen (ca. 8-10 W). So zieht er immer 12-20 W aus dem Netz. Das soll er nicht machen, sondern nur der MPPT wenn die Sonne scheint. Selbst wenn ich das Ladegerät in den EInstellungen ausschalte macht er es.

Was mache ich in der Einstellung falsch?

herour8 asked
herour8 answered ·

6 Answers

What happens with two Multiplus in parallel not linked with each other

Background: I have an old Multiplus 48/5000/70 and I would like to increase the available power with a second battery bank

I'd like to know what happens if I connect the output of a Multiplus to an existing grid formed by another Multiplus. Would it be any different if any or both of the Multiplus is a Multiplus II instead. note that in this example the two Multiplus would not be linked together in parallel, it cannot work as this would require a single battery bank.

Take this schema from the MultiGrid datasheet.


In this schema, Let's replace the MultiGrid by a Multiplus II (as I understand the Multiplus II is an improvement of the MultiGrid). Let's replace the PV inverter by another Multiplus and the PV array by a separate battery bank (that too has solar panels).

What would happen in such a scenario ?

edit: an answer below tells us that it's impossible to connect the output of two Multiplus together without linking them. But then, if the Multiplus is capable of feeding back current to its AC input, the second Multiplus can be connected via its AC input.

If it doesn't work by replacing the PV Inverter by a Multiplus, can I take the PV inverter and plug it to some batteries instead ?

Thank you

mildred asked
shaneyake commented ·

3 Answers

Off grid system upgrade, need another inverter/charger- with one should i go for?

I need info what Inverter/Charger should i buy for my setup.
I have big problem that Victron Distributors won't help me at all.
They just never gets back to me...
What i have already is off grid 100%.

I have connected and running for many years;
15x : CS6P-250 panels
Powerbank: OPZS 130a 56V (2.25v batteries)
Mk3 to USB
Diesel power generator 8KW

What i dont have connected and i bought already:
10 panels JAM60S20-380/MR
Powerbank: OPZS 24V (2.25v batteries)

What i would like to do, connect new panels and new 24v powerbank would be nice to hook it up into 1phase so i could pull more power out of socket etc.

Help me please...

my inverter is:





magicmike asked
magicmike commented ·

4 Answers

ESS (AC DC coupled) "Feed-in excess solar charger power" not full potential


i running a ESS (MultiGrid 48/3000 FW459, VenusGX FW v2.31with EM24) with AC Coupled third party PV Inverters (via ET340 and ET112) and a Smart Solar 150/35 v1.39 and a BYD B-Box 5.0kWh. (DVCC enabled, SVS disable, Smartsolar has BMS controlled)

The DC Coupled PV system is oriented south and could be enlarged by approx 900 Wp, since currently only 1,8kWp is installed. Maximum charge power to battery is limited at 2000W fixed due to the 35 Amps - i know ;).

In the ESS Settings I enable " Feed-in excess solar charger power" but soon i discovered the the typical behavior of the system was to charge from the East oriented AC Coupled inverters, which means, the the battery is full, sincce there is enough excess. But the south orientated DC coupled PV System was dearted by over 50% due to battery being at SOC 100%, even with the enable option of "feedin excess DC Power". Over have of the production of the south oriented DC coupled PV is derated (see pic attached, redline is potential solar production).


To prove my hypotheses i changed the ESS Setpoint to activly discharge the battery into the grid, thus a lower SOC than 100% is realized. this enables the BMS controlled Smart Solar to use the full potential of the PV system. (previously 340W production goes up to 900W Production).

See my screenshots and notes

ESS Feed-in excess solar charger power - not full potenial.pdf


I presume that the Mutligrid doesnt discharge/feedin as much power as the full potential of solar available on the DC side.

I would presume that the voltage Gap between SmartSolar and Multiplus isn't high enough for Multi to discharge the battery more but to keep it at 100% and though making it possible for the SmartSolar to feedin more of his potential solar power.

So propably i will not add any more Modules to the Smart Solar or install another SmartSolar, but install another PV Inverter AC coupled.

If anybody has the same Issue please let me know!

If anybody has an idea how to optimize the use of the DC coupled Solar to feed into the grid, please let me know! I thought already of an external PLC writing the ESS Setpoint into the Modbus register, to actively reduce the SOC during the daytime, to make more use of the DC coupled PV System.




ossi asked
David commented ·

3 Answers

MultiGrid and three ET112 at ACout1- how?

Changing my setup I'd like to connect three PV inverters to the ACout. So far had two ET112 to the ACout, which worked well. I.e. I don't see the individual PV values but the sum of both, which is OK as I work with the Modbus data mainly.

Today I tried to add a third ET112, so I changed the Bus ID with Gavazzi Software. The meter is recognized by the Venus, however - I cannot assign it to the ACout1 like the other meters.
It offers the tickboxes ACout1, ACout2 and ACin but If I tick ACout1, it defaults back to ACin.
Is there a limit of two meters at the ACout?


PS: don't worry about the factor 1 rule, my three inverters never get peak power at the same time.

vicky asked
matthias-roetzer commented ·

2 Answers

Induktionskochfeld mit Landstrom und / oder Generatorstrom wie am MultiGrid anschließen?

Auf meinem Boot habe ich einen 7kw Induktionskochfeld verbaut.

Der Betrieb soll folgender Maßen geschehen.

1. über Landanschluß nur zwei Kochstellen, Unterstützung über den Wechselrichter ist nicht gewünscht (möchte die Batterien nicht für das Kochfeld nutzen)

2. Der Landanschluß ist getrennt, über einen 8kw 3Phasen Generator von Fischer Panda möchte ich alle vier Kochfelder betreiben. 2 Phasen für das Induktionskochfeld, die Dritte lädt derweil die Batteriebank 24V/360Ah mit Hilfe eines Skylla TG24/50 und einem Sterling AB24/60.

Die grundsätzliche Umschaltung zwischen Landstrom und Generator geschieht direkt nach dem Trenntrafo über einen automatischen Sterling Umschalter Prio1, Prio2 und Prio3 (nicht genutzt).

Das MultiGrid kann über sein AC2 Ausgang eine Phase trennen, wie mach ich das aber bei Generatorbetrieb mit der 2ten und dritten Phase?

Als Maschinenbauer habe ich leider nur sehr wenig wissen über die Möglichkeiten der Bordelektrik.

Ich würde mich freuen jemanden zu finden, der mir bei dieser und evtl. zwei drei weiteren Fragen weiterhelfen kann.

Mein Boot wurde elektrisch komplett überarbeitet, leider ist mein Schiffselektriker kurz vor Fertigstellung erkrankt und komplett ausgefallen. Die restlichen 10% versuche ich nun alleine bzw. mit einem befreundeten Elektriker zu bewältigen. Dummerweise haben wir Beide, von der vielen Victrontechnik kaum eine Ahnung.


smilla asked
Ulrich answered ·

1 Answer

In welcher Umgebung ist der Multiplus II 3 KVA einsetzbar?

Ich plane eine Anlage mit einem Laderegler und Multi plus. Dabei mache ich mir auch Gedanken über den Einbauort und die klimatischen Bedingungen. Beim Laderegler scheint das unkritisch zu. Also draußen, regengeschützt. Wie sieht es aber mit dem Multi plus aus? Ist der laut? darf der zum Beispiel in einem Schuppen sein? Hat der eine Lüfter im Gehäuse usw. Wo habt ihr die Komponenten verbaut? Also Laderegler, Batterie, Wandler etc..

geko22 asked
thomasw-1 commented ·

2 Answers

Multigrid 48/3000 inverter priority ?

I have to change my current setup from ESS "feed in excess power" to "island mode / inverter priority" as feed-in is no longer tolerated by grid supplier.

As far as I understood the deprecated "self consumption hub 2" with "prevent feedback to grid" is the only way to control the power of non Fronius PV inverters, connected to ACout, by shifting frequency. ESS does support Fronius only - correct? My Inverter (3,5kWp) doesn't allow true power regulation, but as a workaround I can at least switch it off, by setting the upper frequency limit.

I understand this is not the best setup but I need a solution asap.

I plan to connect the loads to ACout1. Average load is 0.5kW, usually not exceeding 3kW.
In case load increases to maybe 4.5kW I hope the "Grid Assist", properly set, will handle it.
Battery is LG Chem 6.5

In case the Inverter fails I'd like to have th eoption to manually switch my L1 loads to the grid

Please let me know your thoughts


I skip all the fuses and wiring details, just the principle


vicky asked
vicky edited ·

2 Answers


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