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Multiplus II - Dc Ripple with generator

I built a stand alone system consisting of 1Kwp of solar panels, a Victor mppt charge controller, a Multiplus II and a 16s 48v 176Ah lithium battery pack.

the system has been running for about 12 months and is working great and I'm really happy.

In the last days I tried to connect a Honda ex4000s generator, I made the necessary changes to get the generator working.

Unfortunately, I have noticed that if I switch on the generator I have a DC voltage ripple.

This problem occurs especially when I switch on the generator when the solar panels are also producing current. In this situation you can see on the ccgx that the voltage varies continuously in a few seconds from 51v to 53v, after which the system goes into protection and shuts everything down.

I was able to solve this problem by inserting a relay that disconnects the solar panels when the generator is switched on. after about 20 minutes of operation, the problem occurs again.

The cable cross-section is adequate and all connections are correct and stable.

do you know what could be the problem ? the generator current not clean ?

marcmu asked
trevor-bird edited ·

2 Answers

Multiplus With Generator And Residual Current Device


I have a Multi 48/5000 and a very cheap but good working 2.5KW gasoline generator connected to AC IN.

At final installation tests, I found out that the Residual Current Device does not work, when the generator is running and supplying power, even though I connected a good earth to the generator.

It seems, the generator is not capable of a RCD.

Is it OK to hard wire PE and Neutral on the Multi? Or what is common practice?

Thank you.


markus asked
Guy Stewart (Victron Community Manager) commented ·

1 Answer

CCGX Genset auto Start/Stop


we just figured out, that it is impossible to interrupt the auto start of the CCGX. If the autostart is enabled, we can only stop the genset by the Fischer Panda genereator panel. When stopping by FP-panel, the autostart function of FP is automatically disabled and must be switched off an on again to enable the autostart function.

It would be very helpful to have an option to stop the genset by the CCGX while it runs due to the autostart.

valentinschmid asked
harold commented ·

1 Answer

Skylla-i 24/80 won't bulk charge!

Can anyone help me please? New Skylla-i 24/80 charger won't charge batteries at all. Jumps to ABS each time! There must be some way to force bulk charging (I've tried all the settings I can think of).

(Batteries: 12x2V TOPzS)

mbelgil asked

0 Answers

Kohler 7.5 Quattro Cerbo GX With Load Sensing Gen Start

My genset is controlled "start/stop" by sensing the presence or absence of a load on the line. It also has a two wire start/stop. The two wire will not stop the genset if there's a load present. My question is, will the Quattro AC IN-1 contactor open and close as necessary for my genset when programmed with the gen start/stop features in the Quattro or Cerbo GX or do I need to add a external contactor?

Thank you

burnscraft asked
marc-heide answered ·

4 Answers

Generator/ multiplus2 synchronisation
If you enable generator pass through to support loads with a Multiplus2 in 3 phase configuration- how long does it take for the generator to synchronise and take the load?

eyrere asked
trevor-bird answered ·

2 Answers

Split phase 24/5000/120 dual Quattros with single phase-240v generator

My current motorhome system uses two 24/5000/120 Quattros wired in split phase, these are fed from a Lynx BMS & distributor from five 25.8v Victron Lifepo batteries. I do not have any 240v loads to power. The motorhome has a 50 amp shore power connection and my generator is a 240v single phase Cummins Onan 8000QD (two same phase 33 amp feeds).

I have unselected grouping for L2 and set the input limits for shore power to 50amps and generator to 30amps. My power assist factor is set at 0.9. With the generator running the master Quattro connects to the generator mains and provides passthrough power and battery charging. The slave unit never switches from inverter mode. Is there a way to also have the slave unit connect to the generator mains? From the generator, I have wired the Quattrros with the black leg and split neutral going to the master Quattro and the red leg and split neutral go to the slave Quattro.

When connected to shore power, everything works as expected. The L1 and L2 values show on the Cerbo GX Touch screen and under Victron Connect (MK3 connection). When connected to the generator feed, nothing shows on the Cerbo GX and under Victron Connect, the AC2 shows connected, but doesn't have any other information. The outgoing L1 and L2 show values under both connections.

Chris Turrisi asked
sebastianlehmann answered ·

1 Answer

Onan generator split phase compatible with Quattro

I have an Onan 120/240 VAC split phase 9.5 MDKBM generator that I would like to wire to a (yet to be purchased) Victron Quattro. The other AC in will be connected to the shore power (single phase 240VAC).

My question is: will the Quattro accept the split phase 2x 120 VAC as a valid 240VAC source next to the single phase 240 VAC shore power?

The current Victron Centaur charger works fine with both Generator and shore power (via manual switching), but needs to be replaced because of an LFP battery.

I was thinking of a Quattro or Multiplus, but prefer the Quattro because it switches grid/generator automatically.

barhee asked
sebastianlehmann answered ·

4 Answers

victron quattro 24/8000 Relay program

Hallo. I have a victron quattro 24/8000 with a victron cerbo gx connecete to the system. is it possible to program one of the relays to pull ON when switching to generator (AC1) and stay on? i can not find an option in VE. Config 3. That would be a good thing in the Marine world.

Kasper asked
Juha Tuomala commented ·

2 Answers

Victron Quattro-II 48/5000/70-50-50 QUA482504010 certifications for german grid?


as the Multiplus-II does not accept generators if configured for the german grid we need to use Victron Quattros-II 48/5000/70-50-50 QUA482504010. They can be bought in Germany but seem to lack certifications for the german grid.

When will the certifications for the german grid be available?

It would be sad if we have to switch to another manufacturer than Victron because of the lack of generator-support/certifications.

Thanx for any hint! :-)

renne asked
Juha Tuomala commented ·

12 Answers

On-Grid PV Inverter als Generator für Multiplus II ?


ich möchte ein AC-ESS mit einem Multiplus II 5000, Pylontech-Akkus und dem EM24 realisieren. Als PV Anlage habe ich noch eine Anlage von 2010 im "Überschussmodus".

Soweit, so gut. Leider habe ich aber keine Autarkie-Möglichkeit, sollte das öffentliche Netz mal down sein. Ich habe dann lediglich die Akku-Ladung da sich mein Wechselrichter (Mastervolt XS4300) nicht mit dem Multiplus AC-koppeln lässt.

Nun aber folgender Gedanke: am Multiplus stelle ich AC In1 auf "Generator" und schließe dort den PV-Wechselrichter an. Dieser synct mit dem Multiplus und lädt dadurch primär den Akku.

Start/Stop des PV-Inverters ließe sich über den Relaiskontakt schalten, wenn der Akku voll ist, wird ein Relais geschaltet und der Wechselrichter vom Multiplus getrennt, wird eine bestimmte Akkuladung unterschritten, dann wird der Wechselrichter hinzugeschaltet, synchronisiert und lädt dann den Akku.

Das wäre vielleicht nicht die eleganteste Lösung, sie soll ja aber auch nur im Desasterfall funktionieren.

Wäre das prinzipiell möglich oder habe ich einen Denkfehler?
Besten Dank!

chrisu asked
chrisu answered ·

9 Answers

Quattro II für vorgesehenen Einsatz in Deutschland (Generator)

Moin, bin jetzt alle Einträge durch, aber habe drei Anliegen:

Ist absehbar ob überhaupt eine Zulassung für den Quattro 48/5000 kommt.

Ist absehbar ob es ohne Zulassung möglich ist das ganze "sicher" zu betreiben (LOM nur auf einem Eingang deaktiviert - ich habe die Anlage noch nicht und verstehe verschiedene Einträge so als wäre es nur möglich ohne Grid Code Deutschland (also other) den LOM zu deaktivieren

Wie würdet Ihr vorgehen (es soll eine 3P Anlage mit der Möglichkeit der Generatornachladung auf einem Bauernhof installiert werden)

jan-rotermund asked

0 Answers

Using Multiplus to reduce generator fuel consumption

Hi, I have a multi-+2 3000 W charger/ inverter connected to 1450 amp hours of battery storage at 12v, I'm trying to figure out how to configure the multi plus so that I can use the stored energy in the battery to supplement the the generator to reduce fuel consumption for a longer period of use time. I tried this using power assist settings in reducing the incoming amperage from the generator so the converter would supplement power, that worked great until the loads dropped below the set point of power assist in the battery speaking to charge off of the inverter.

Does anyone have a suggestion on how this can be configured properly so I can use/consume the energy stored in the battery and supplement the generator for a longer period of runtime and fuel savings? Ideally I would still like the ability to use the MPPT
to charge the batteries while in this configuration. Also I am always not on generator and need to be able to switch back to normal operation when connected to the gird/shore power. I tried to use the ESS assistant but is not recommended and did not work well with the generators.

Jeff Kellner asked
kevgermany answered ·

1 Answer

Multiplus II/Quattro II: State of (co-)generator support in ESS mode?

@mvader (Victron Energy)

@Johannes Boonstra (Victron Energy Staff)

Customers are waiting for months now to have (co-)generator support in Multiplus II/Quattro II ESS mode. Especially with the new geopolitical situation (Russia) customers demand co-generator or backup generator support in stationary/grid tied installations.

What is the current state? When will generator support be available in ESS mode?

renne asked
jan-rotermund answered ·

4 Answers

Which generators are fully compatible?
I want to build a photovoltaic system for my home similar to the following (I will probably use EasySolar II instead of Multiplus II+SmartSolar MPPT+CCGX):

Which generators are fully compatible?
Someone has already used the Black & Decker BXGND5300E and / or BXGND6300E?
Someone has already used PRAMAC PMD5000s ?
I want to use the generator only for the time necessary to recharge the battery (2-5 hours) when the public grid is not available and solar energy is insufficient (I could also disconnect all non-essential domestic loads, if necessary to facilitate the operation)
I believe it is important that Victron publish a list of fully compatible generators for this type of application, without delegating the responsibility to local dealers.

francesco-marzulli asked
jan-rotermund commented ·

5 Answers

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