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MultiPlus Quattro Inverter Charger

Why does turning off the charger in the Multiplus affect the mppt regulator?

Hi. I have a problem with the MPPT RS 450 charger. I have two identical strings connected to it, pointing in exactly the same direction. I want to charge the battery only from the DC charger, so I have the charger built into the Multiplus turned off via ESS Control Node.

From time to time one of the mppt trackers cuts production. When I turn on the AC charger for a couple of seconds, it starts producing at full power again even when the AC charger is turned off again. See in the video how it looks exactly.

There is also problem with mppt to even start after the night, when the MP charger is off. Look at the picture below.


My goal is to charge the battery only from dc mppt when there is a grid and export as much as I can to the grid from ac coupled inverter.

smartdiy asked
smartdiy answered ·

1 Answer

Solution Victron & Dynamic Energy pricing

How to Control dynamic energy contract with Quattro II, Cerbo, Node Red, Ecoswitch, 15 Kw Lifepo4 and JK BMS = sharing knowlegde.

For those that don’t know yet. A Dynamic energy contract charges you per Kwh for a particular day / hour. Prices are updated daily. Price can change dramatically during peak or low hours.

I have tried different ways to control my Quattro to adapt to my dynamic energie contract, but simply using: Charge only, Inverter only and “ON” buttons in Venus don’t really work.
Sometimes when switching, it cuts of the power to the loads, and it wont let you shift loads and generated power.

Also, I did not want to spend hours writing code to read the daily prices, so I used a small hardware gadged that reads it for me and sets a relay depending on a preset max. price per Kw limit.

The following example is one that works. ( for me anyhow )
For those that are not allowed to feed back into the grid a couple of things should be configured different.
In my case, I am working with a grid fuse of single phase 25 Amps, and I am allowed to feed back into the grid. And sporadically I am using more than 25 Amp.

For Node red, I used 4 functions:

#1) Grid price low = AC-in set to High, will allow max usage from/to grid and solar, and will also allow charging at high current.
#2) Grid price high = AC-in set to low, will suppress charging and usage from grid but not from solar or batteries, thus prevent buying expensive power. This option has a manual override in case more power needs to be used in expensive hours during morning or evening.
#3) Set grid to allow excess power frrom solar to grid. I have it set just above what my PV panels would produce at max.
#4) Set grid when batteries empty and no solar to charge.


P.s. Set AC-In current 1Amp below maximum input from grid. Max draw from grid cannot be “zero”, will always jump back to 1 Amp.
Looks like a safety feature so Victron has always some power from the grid to function if battery and solar
are down.

Cheers, Marc

marcve asked

0 Answers

cerbo gx sehr viele geraete mehrere bmvs direkte verbindung nicht moeglich


ich bin endlich einmal dazu gekommen, mein 2. cerbo-gx einzurichten, so dass ich es endlich installieren kann, nachdem es jetzt ca. 1 jahr im schrank lag.

leider ist das ganze aber mit einigen problemen verbunden:

1. ich kann das gx nicht zur steuerung meiner ladeleistung verwenden, das muss eine selbst erstellte software uebernehmen.

2. ich habe mehrere bms in betrieb und das gx nutzt immer nur eines davon was zu falschen werten bei der anzeige fuehrt.

3. ich kann die laderegler weder mit einem noch mit einem anschliessen!

4. es muessen aktuell 22 verbunden werden und es kommen wohl noch welche dazu.

fuer das 1. problem gibt es aktuell leider keine loesung, wenn die laderegler direkt am cerbo haengen, das 2. problem kann ich ueber node-red loesen, indem ich ein dashboard erstelle, das mir die richtigen werte anzeigt.

da ich meine ganzen laderegler an portservern fuer serielle ports haengen habe, ist es aber moeglich, dass die daten der laderegler an bis zu 4 systeme gesendet werden koennen. dadurch habe ich die moeglicheit, die ganzen daten mit einer eigenen software zu verarbeiten und sie zur auswertung und steuerung der wechselrichter ueber node-red dem cerbo zur verfuegung zu stellen.

allerdinge waere ich hier sehr gluecklich darueber, wenn das venus-os so etwas von sich aus unterstuetzen wuerde und ich nicht auf einige tricks zurueckgreifen muesste.

ich habe mir also das programm socat von einem raspberry pi auf das gx kopiert und ein script erstellt, das virtuelle serielle ports damit anlegt und anschliessend das programm vedirect-dbus fuer die schnittstelle startet. es sieht jedenfalls einmal so aus, als wuerde das problemlos funktionieren. das kann ich aber erst morgen sehen, wenn meine laderegler alle wieder daten senden.

falls hier jemand einen besseren vorschlag hat, waere ich sehr interessiert.

meine aktuelle loesung hat auf jeden fall mehrere vorteile, vor allem kann ich die regelung auf mindestens 2 systemen laufen lassen, so dass ich eine backup-regelung habe und das gx bekommt alle daten und kann sie an das vrm-portal senden.

auch eine beschraenkung auf 15 gibt es damit nicht mehr.

urspruenglich hatte ich vor, mit einer software die beiden bms als ein einziges zu emulieren und eventuell die laderegler auch gleich zu einem zusammen zu fassen. aber die aktuelle loesung ist einfacher und liefert mehr informationen.

aber jetzt muss ich das teil erst einmal richtig im system anschliessen, da der akku, den ich zum testen angeschlossen habe, inzwischen leer ist. das hat man davon, wenn man keine lust hat, das teil provisorisch mit einem netzteil zu verbinden.


d-ferdi asked

0 Answers

Switch Multiplus with Venus GX and NodeRed


I have a switch connected to the I/O of my venus, now i would like to switch the multiplus 24/5000 on and off.

the I/O signal is working, it sends 3 or 4 to the multi. Sounds alright so far. But the strange thing is the multi is swiching on for maybe 3 sec and turns off. Same thing if i repeat pushing the switch.

thanks to help

brezzi asked
Sten edited ·

1 Answer

Switch Multiplus with Venus GX and NodeRed


I have a switch connected to the I/O of my venus, now i would like to switch the multiplus 24/5000 on and off.

the I/O signal is working, it sends 3 or 4 to the multi. Sounds alright so far. But the strange thing is the multi is swiching on for maybe 3 sec and turns off. Same thing if i repeat pushing the switch.

thanks for help

brezzi asked
brezzi edited ·

0 Answers

Hello Victron please help us with ESS Phase compensation!

Hi Victron, we are discussing in several threads a nearly similar question without an expert comment by victron-staff:

This main problem of an „symmetrical“ or „balanced“ ESS in a three phase grid-parallel setup is absolutely essential for the German and Austrian market. Please let us know what you think about it! Thank you very much!

woliver asked
n-dee commented ·

5 Answers

Multiplus Battery temperature in Node-RED

I am sure I am overlooking something here,

I can't seem to find the Multiplus read battery temperature in any of the Node-RED nodes. It certainly shows on my console so the data is there, and in VRM, and I can easily access the battery temperature sensors directly connected to the Cerbo, and the one connected to the BMV, but link to the Multiplus message containing battery temperature, I can not find...

billknny asked
kevgermany edited ·

1 Answer

AC Current limit, Multiplus

Dear Community,

I had a Automated Current limit flow set up on Node red with CCgx last year, this flow would subtract the Amps from 2 circuits that are directly connect to our generator , from the current limit so that we are able to get quickest charge times possible, while not over loading the generator when say ( oven , hob, dishwasher, 2x clothes washer , drier ) are on , in there various states of consumption.

My Question , can anyone please tell be the topic for Current limit on the Cerbo ? we have recently upgraded from CCgx, ( on the ccgx the topic was something like W/506583dbfda4/vebus/276/Ac/ActiveIn/CurrentLimit ) open to ideas ...

Many thanks

all the best


londine asked
Alexandra edited ·

0 Answers

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