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Multiple bank charging with one multiplus

On a boat 24 volt system

2 engine, 2 alternators, 4 battery banks (8*12v batteries (2 house and 2 starter per engine)

Each alternerator is connected to a argo fet which then charges the batteries in each bank which all works

Multiplus is connected to 2 of the house batteries on one side

Can anyone suggest how I can use the charger output from the multiplus to charge all 4 battery banks, with out bridging the alternators

Massive thanks in advance


nickbentall asked

0 Answers

Adding a multiplus (charger only) to a complete system, how to protect lithium batteries

I have a system with victron lithium batteries + quattro + Ve.BMS.
For quicker charging i would like to add a multiplus (because i have one), set on charger only, without connecting it to the system with network cable and without using the 230v output.
Now I need to make sure that the mulitplus is connected to the charge disconnect from the VE.BMS, but how to do it? I tried to connect the remote connection to the charge disconnect, but that is not working. Can is use a battery protect or will this blow up the multiplus when activated? Is there another way?

Frank asked
Frank edited ·

0 Answers

MultiPlus don't reduce charge current commanded from BYD


This system, 3 parallel MultiPlus-II 48/5000 with 2 BYD BBox LV 14kWh and 2x 250/100 MPPTs.
Its recharging during night time via generator control (No ESS or such).
Now the batteries shut down short after fully charge 100% SOC.
It looks the BYD commanded CCL 0A, but MP-II is still charging with 25 Amp.
Battery shut down after a while.


DVCC is active, no shared sensors are active like victron battery compatibility doc recommend.


Any ideas / thoughts?

Thanks a lot. Saludos

Silvio Franceschini asked

0 Answers

Quattro 15kva battery terminals short during Loadshedding

Background : we have blackouts in South-Africa (Loadshedding), power is cut for 2 hours at a time in my town (Nelspruit), depending on the stage between 1 and 4 times per day currently.

I bought the Victron Quattro 15kva with 28 panels, 2 mppts, cerbo gx, color screen, smart shunt and 2 x 10kwh Lithium batteries. Was installed by a Victron accredited installer.

The purchase was made to avoid Loadshedding and not be affected by it.

Between every 3rd and 6th time the inverter will shut down completely, whether my loads are 200, 1200, 2000 or 4000 watts, doen not matter if the batteries are 70, 90 or 100%.

If it's during the daytime it will start up again within 2 minutes if there is sufficient sunlight. During nighttime it wont come back on at all until the grid power is restored.

There is a short on the battery terminals so the batteries goes into protection, It won't turn back on again, even if I turn the unit off and on, only when the grid come back it will turn on.

The installer updated the firmware to the latest version.

He set the cut off voltage to 210v to not follow the grid down for a "brown out"

I cannot replicate the problem by turning of the main grid power, then the inverter switches without issue.

Any help would be appreciated

leetpro asked
leetpro edited ·

0 Answers

multiplus ii 48/3000 gx do not charge more than 5 amps.

HelIo i am new with victron multi plus 2. My problem is, i cant reach more than 5.xx amp charging curret. Charger Setings set to 56v and 35A.


algirdas asked
algirdas commented ·

0 Answers

Off-grid PV Inverter support on AC IN - respond to frequency changes

In all of my searching, I can only find configuration options to modify the behavior of Multis/Quattros by changing the frequency on the AC Output. But I'm still a novice in the Victron world, so maybe I've overlooked something?

What I'd like to achieve is change battery charge/discharge parameters based on the frequency of AC Input. As far as I can see, this isn't possible, but I'd appreciate being corrected if I'm mistaken!

My goal is to use Multi to:

  • keep SoC > XX% (or keep a minimum DC Voltage)
  • if frequency > XX, charge batteries (ideally, current increases with frequency)
  • if frequency < XX, discharge batteries (via PowerAssist or Ignore AC?)

The purpose of this is to interact with an existing off-grid system in a supportive way. Grid-tied inverters will curtail their output in response to rising frequency. To avoid "wasting" that energy, I'd like my Multis to store power in the battery, until the excess condition is gone, then give this energy back again until the batteries approach empty.

I'd prefer to use an Assistant or Virtual Switch over something like Node Red, but I don't see the functionality there. Am I missing something?

randyoo asked
randyoo edited ·

0 Answers

Semi Off Grid dilemma

Hi All

Skylla with Quattro setup

I am from South Africa, so some of you will know that except for the constant looming of loadshedding , our electrical grid is in a bad state.
When ever one wants to install a Grid Connected solar system, does not matter what brand or type, Grid Tied or Hybrid, when you connect the input of your inverter to ESKOM( our power utility) in the country side you need to hand in an application first with all plans and designs prior to installation. Even if you do not plan on feeding back to the grid. They are very strict regarding this. Which is understandable, but very frustrating and tedious and can take very long.

When connecting to municipality in a town they are somehow and somewhat less strict.

This leads me to my question, and please direct me to the relevant thread if this has been covered somewhere else. Also do not hesitate to shut my train of thought down if it is not possible or not legal. I am merely pondering with ideas around a problem lots of customers and installers face

Is it at all possible to have the following system :—Grid point transformer is a 50kVa point—

So any loads on the system cannot ex

3 X Quattro 15 KVA 3 phase setup (no AC input)

6 x 250/100 MPPT

40 kw PV array for MPPTs

Fimer or Fronius 50 kVa string inverter on AC output of Quattros

50kW array for string inverter


kWh lithium battery bank

3 x Skylla TG 48V in paralell to charge battery bank (specified hours at night or cloudy days)

Cerbo GX

All relevant fusing and isolation and earthing of course.

The important part is an 3 phase automatic on load change over switch.

Once the battery reaches a certain SOC a relay can be triggered to energise a contactor to automatically switch the load back to grid.

Center changeover

It is important that the hybrid and pv inverters are not connected to the grid what so ever.

The only grid connection is the Skylla chargers that feed the batteries if needed.

This way you are not completely off grid witch is fine because the main goal is minimal reliance on the grid without the time consuming and difficult long process.

Perhaps someone gan assist me or advise me if this train of thought is completely off the rails.

Thank you

bergmans-trading-cc asked
randyoo commented ·

0 Answers

3 Phase grid with 1 Phase ESS

Good day,

I'd kindly like to know if its possible to backup L3 with Multi or Quattro and leave L1, L2 without Quattro as shown on the picture. Backfeed is allowed on 3~ 400V 50Hz grid.


Jens T. S. asked

0 Answers

Phase rotation Issue

We have a three phase system with 3 Quattros 8000. The Inverters/chargers accept the AC supply normally and go to charger mode but there is an alarm of Phase rotation warning raised on CCGX and VRM

"VE.Bus System - Phase rotation: Warning "

Since the system accepts ACin and charges the batteries normally as well as passing this input to loads why we get this alarm on the system. Can this happen? Any ideas?

emmanuel asked
emmanuel edited ·

0 Answers

Output voltage loss on virtual switch MultiPlus 24/3000

Setting up virtual switch on MultiPlus 24/3000 (running 2 parallel with a bank of Li-Ion batteries in 24v, Cerbo GX, and 2 SmartSolar MPPTs w/2 banks of panels). When battery conditions are met and it switches, there is a temporary loss of AC output power and everything resets (all 110/120v outlets and appliances in my RV). It is worse from battery to grid (50A 220/240v service with one leg to each of the Multi’s), but does it grid to battery as well. This is highly frustrating as it turns off tv, internet router, washer/dryer, etc. Started as a few second gap, but seems to be taking longer each time.

1. Is this a common occurrence for others running virtual switch? Would hub assistants be better (just the self-consumption or would I need more and which ones)?

2. Could this be a tug-of-war (of sorts) between the multi and the RV onboard surge protector?

bigheadprop asked
kevgermany commented ·

0 Answers

coffret ac 3 circuits mono vers tri


j ai 3 quattro 5000 qui sont paramétrés en triphasé comment les protéger :

coffret ac avec interdif 40a ou 63a tetra + 1 disj 25 ou 32a tetra


coffret ac avec interdif 40a ou 63a tetra + 3 disj 25 mono

sachant que j ai une pac en tri en aval avec abo edf 40a tri

merci d avance

pascalhtml asked

0 Answers

DC couple Quattro + RS Multi

Hi everyone,

Would it be possible to DC couple a Quattro and an RS Multi?

My Quattro is acting up, not charging with excess (I have both Fronius on AC input and Huawei on AC Output with AC sensor). Right now, the Quattro is with my old lead-acid batteries (i hoped by removing the JK BMS from equation, it would start charging as it would see a "dumb" battery pack with only the BMV700 shunt). But what I hope to do soon, is expand the new LFP pack and leverage both inverters on the same pack (the RS alone might not be able to cover all my loads as I run exclusively on electric with 2kw boiler, 2kw heatpump, all electric appliances, etc.).

I think best would be to use RS with it's own 3kw array, DC coupled with Quattro, which would have the 5kw Huawei on AC Out and on quattro's AC IN have the Fronius between him and the grid.

Opened to advice :)


iromeo asked

0 Answers

Main Power Failure

Good day All, one of our installers have experienced a problem after installing a 10 000va Quattro.

The grid breaker in the Distributor board and the breaker that feeds to the AC input on the inverter, trips randomly without any reason. We did establish the grid voltage can sometimes drop as low as 150 Volt, we also know this will cause the amperage to increase and therefore tripping the breakers.

However this is seldom and doesn't occur every time the breaker's trip.

What are the possible reasons for this to occur, we look for any advice?

Possibly a problem with the inverter?

We look forward to any advice or comments on the above stated.

Many thanks

alex-4 asked
alex-4 commented ·

0 Answers

Phoenix Multiplus 24/3000 (firmware 1912209) compatible with lithium batteries?


My current inverter/charger Phoenix Multiplus 24/3000/70-16 works well with 12pcs of 2V OPzS batteries. Because of the weight, footprint and 'maintenance' of these batteries, I want to switch to lithium. Does anybody know of this inverter/charger is compatible with lithium batteries? I have installed the latest firmware version 1912209.

Thanks and regards,


svdhoorn asked

0 Answers

Prog.Relay Quattro

What is the easiest way (I suppose assistant)for set programmable relay in Quattro for inverting/mains state detection. For example if Mains state occurs Relay goes to active. When Inverting state occurs , programmable relay is deactivated.

freenergy789 asked

0 Answers

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