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MultiPlus Quattro Inverter Charger

Strange AC load values from Quattro with no load connected

I have a Quattro 48/5000 connected to a Cerbo and am getting some very odd results that don't make sense on both the web console and Modbus-TCP.

There is no load connected to the Quattro.

Scenario 1: Quattro powered by batteries

Console displays AC load as 0 which is correct.
Modbus register 817 (from the Cerbo) shows 00 00 (0W) which is correct
Modbus register 23 (from the Quattro) shows FF FE (-32767W) which seems wrong!

Scenario 2: AC in 1 to Quattro with 220VAC, Quattro in Passthru

Console displays AC load as between 100W and 103W
Modbus register 817 (from the Cerbo) shows 00 64 (100W) which is wrong as there is no load
Modbus register 23 (from the Quattro) shows 00 0A (10W) which is wrong as no load

Why is the system showing an AC load when there obviously isn't one and why is there a discrepancy between the Quattro Output power and Cerbo AC consumption?

acuario asked
Mike Dorsett answered ·

1 Answer

MPPT Solarleistung geht auf 0 Watt, wenn MultiPlus Landstrom bezieht


meine Anlage (in einem Wohnmobil) besteht aus folgenden Komponenten:

- Cerbo GX
- MultiPlus 12/2000/80
- SmartSolar MPPT 100/30
- SmartShunt 500

Grundsätzlich läuft alles, wie es soll, aber sobald ich den MultiPlus an Landstrom anschließe, stellt der MPPT seine Arbeit ein und die Solarleistung geht auf 0 Watt. Es wäre doch sinnvoll, vorranig die Solarenergie zu nutzen. Insbesondere auf Stellplätzen mit verbrauchsabhängigen Landstromtarifen wäre das sehr wünschenswert.

Habe ich irgend etwas falsch konfiguriert oder ist dieses Verhalten so gewollt?


peter24 asked
netrange commented ·

2 Answers

Split phase victron quarrto 3000/48 not charging from AC

Hello, I hope someone out there can help.

the system in question is installed on a bus with Solar but currently located in a very shaded area, from time to time we need to charge from grid.

the system has a Cerbo GX.

also in setup we disabled "Switch as Group". As suggested in other posts. As we are triying to charge from a single 120V ac input (AC Input 1)

Additionally it is in VS it is setup to start charging from ac when battery voltage drops below a 56 volts.(condition was met).

when connecting to grid, it shows volts and hertz but doesn’t start charging.

Other info:

There’s a CAN bus BMS connected and it controls solar charging perfectly.

I’ll be glad to provide any other data.


chenirl asked
Alexandra commented ·

0 Answers

QUATTRO 8000 et SMA SB4000LT-21 avec ESSet cERBO



Ma config sue le schéma. Tout fonctionne parfaitement à l'exception de l'affichage des puissances sur l'écran du cERBO.

Sur LOAD, il affiche toujours 0W et la valeur affichée sur GRID me parait très grande.

Pouvez vous me confirmer que lorsque l'onduleur PV est sur la sortie AC du Victron, un compteur n'est pas nécessaire ?

lalluyn asked
David Foret (Victron Energy Staff) answered ·

3 Answers

Mon générateur n'est plus opérationnel depuis ESS

Bonjour à tous,

Depuis que j'ai installé l'assistant ESS sur mon quattro, l'alimentation depuis l'entrée AC in 1 (mon générateur) n'est plus opérationnelle ! Lorsque je veux alimenter le quattro depuis le générateur, celui-ci détecte bien la présence de tension sur l'entrée AC in 1, mais il ne commute plus et reste sur la position Inverter.on (il ne repasse pas sur la position mains on).

Pourquoi ???

Merci pour vos retours sur ce sujet.

Bien cordialement à tous.

Jean-Pierre PALMAS asked
David Foret (Victron Energy Staff) answered ·

8 Answers

can you get a version software for a multi 5 to run ess and dvcc on a unit that has version 1959209

i have loaded the latest version for the 1959 code but wont give me a grid code and also cannot run ess on the unit. can we get a version that will work for this

tyronmarais asked
tyronmarais commented ·

1 Answer

Semi Off-Grid System; recommendations ?

Hi all

I'm fairly new to Victron products and need some advice for building a system to power my Home-Lab.

Home-Lab should be powered by PV energy as long as there's enough power from pv panels and/or battery storage. As soon as there's no energy left to power my Lab it should automatically switch to Grid power. When there's again energy from pv/battery an automatic transfer to PV energy should occur.
This system shall NOT feed energy to the grid.

Already found a Automatic Transfer Switch with capability of Monitoring battery voltage; as soon as battery voltage drops a certain value it transfer to grid power and back to to PV when battery voltage above threshold. Unfortunately, this ATS is just a mechanical switch by relays. So, no phase sync to 50Hz grid does happen, which is quite dangerous for some reasons.

I very much appreciate any recommendations regarding product selection and design of such a system.

best regards,


alphalinux asked
Mike Dorsett answered ·

1 Answer

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
Alexandra commented ·

3 Answers

ESS System Phase Compensation Help

i installed 3x MP2 3000VA /48V. Updated Firmware to 2629474. made ve quick config, setted all settings. made the ess assistant in each MP. Now i try everything but the whole system acts like phase compensation is disabled although it is enabled. each inverter does only deliver so much power as required on the specific phase according to the grid meter. No idea why the compensation setting in the venus gx is not working. Please help!!

AC L1,L2,L3 is connected to MPNr.1-ACIN, MPNr2-ACIN, MPNr3-ACIN. The system is useless. If the electric car is plugged in on one phase with 7kW it only delivers max. 2.4kW from one inverter, if no other loads are switched on. If someone cooks on L2, i only get 2.4kW from the inverter on Nr.2.

I read all installation manuals, the training video on the Victron professional side, there is no hint what is wrong, looks like a software bug on the Venus gx!



gnagflow asked
Magnus Pernemark commented ·

8 Answers

Multiplus not using full shore power limit

Running the air conditioner in the RV with AC input current set at 15 but muliplus will only use around 9.5 and is using power assist to make up for this. See screen shot 1


If i turn off power assist it will then fully uses shore power and even has a little left over for battery charge. See screen shot 2


I have tried turning on/off the weak ac and the ups functions. How can i fix this? I need to have the power assist on so even though with it disable it does pull the full amount from shore current. With it off i am unable to run other interment ac loads.

redwood asked
charcast answered ·

26 Answers

Anyone in USA using Quattro-II 230V?

I am looking for a inverter to power a 240v mini-split, and want lowest idle power consumption possible with dual A/C inputs. Quattro-II seems like the best choice. However, I don't see a lot of resellers showing this model (24/5000/120-50/50 230V) for sale. I intend to only use 240V loads (the mini-split), and A/C input will either be 50amp/240V shore power, 15/30Amp/120V with step up transformer to 240V, or 17.5Kw GenSet (should be 240v capable but confirming).

Wondering if anyone has experience with this model, especially in an RV in the USA.


amt asked
Kevin Windrem answered ·

1 Answer

Multiplus Compact - Kurzschluss bei Landstrom Anschluss

Hallo Community

Ich habe bei meinem Multiplus Compact 12V/1600 das folgende Problem sobald ich den Landstrom anschließe (AC IN) sofort der FI (keine Sicherung) auf der Landstromseite fällt. Stecker ist korrekt verkabelt, Multiplus hängt bereits auf der Batterie (läuft auch einwandfrei und lässt sich konfigurieren)

Vielen Dank für eure Hilfe schon mal vorab

mario-langmann asked
mario-langmann commented ·

3 Answers

How to manage brown out conditions with Quattros in UPS mode?

I am struggling to find a reasonable solution to handle extended brownout conditions with a Quattro system. The system is connected to a large battery bank and a powerful diesel and works as big UPS.

Mains is connected to AC1in , generator is on AC2in. This is intentionally, because we use the "do not run generator when AC1 is in use" feature of the Venus GX.

Perfectly working so far during mains black outs.

The problem starts when the mains remains longer times in brown out conditions (= all phases between 175V-185V , almost independent from applied load) :

The Quattros remain in inverting mode even when stable power from the diesel would be available on AC2 in because the Quattros measure "some" poor voltages on AC1 in.

I know that swaping AC1 and AC2 would help but at a price that the 'stop generator upon mains is restored' feature would be given up. This feature, however, is a significant operation cost factor.

Option 1:

Is there a way to force the Quattros to accept AC2 input power even when "some" poor AC1in voltages are being detected?

Option 2:

If option 1 is not possible, is there a solution to stop the generator automatically upon return of mains when mains is connected to AC2in?

Henrik asked
Henrik answered ·

2 Answers

No AC loads yet Quattro reports a 244W AC draw while charging?? Pic attached.

I am currently commissioning a Quattro 48/5000/70 single phase unit and a 280ah home made battery before moving everything to a cabin in the woods.

The only thing hooked into the L1 out are three recepticals with NO load and a lightning arrestor (which was removed for testing purposes).

The draw only appears while charging battery with temporary AC power I have wired in from my main service panel.

I dropped the charge rate from 21A to 15A and the AC load dropped to around 86W, kind of proportional. Is this what is consumed by the conversion of AC to DC?

Any thoughts on this?


northtown2022 asked
snoobler answered ·

2 Answers

Multipus AC output feeding another Multiplus AC input

I would like to add another large battery capacity ( perhaps Lithium or Lead Carbon ) to an existing Home UPS ( Multiplus 5 kVA 340 AH ) setup. I was considering getting another Multiplus which would manage the new battery and Solar PV inverter and its output would then be AC feed IN to my existing Multiplus effectively replacing the previous Utility grid . Would this work ? Would the downstream ( old ) Multiplus not complain about source impedance perhaps ? What is the maximum source impedance that it will tolerate?

merlepeter asked
Anders commented ·

2 Answers

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