Trickle charger fom leisure battery


I am looking for a trickle charger to maintain my starter battery charged from my solar panel.

I wonder why Victron do not provide such product, like AMT12
It is really an issue for me and unfortunately, since brexit, I can't buy AMT12 from France...

@victron guys, do you plan to add suh product?


anayrat asked
Sten answered ·

5 Answers

Smart Battery Sense

Habe ein Smart Battery Sense an einer Liontron 12 V 220 Ah; Cerbo Gx, Multiplus II 12 V 3000 W.

Bei den Geräten wird das Battery Sense angezeigt, Firmware ist aktualisiert usw., aber in der Remote Control wird das Gerät immer nur als "unterbrochen" angezeigt. In den langen Anleitungen habe ich gelesen, daß beim Wechselrichter Dip Schalter 1 ein und Schalter 2 ausgestellt werden muss. Nun hat der Multiplus II aber keinen Dip - Schalter.
Was kann ich nun tun ?

Ulrich Graefe asked
johanndo answered ·

1 Answer

Efficiency much lower when drawing from both battery and solar compared to solar only?

I have the Multiplus 2 48v with 120v output (Model pmp482305100) that is 95% efficient. My charge controller is a 150/35 that is 98% efficient. My battery and nearby equipment is at about 90 degrees Fahrenheit or 32 degrees Celsius. I've attached 2 pictures showing common situations where the load is run off solar only and where it's combined solar and battery. I have no DC loads other than the Victron equipment itself. The battery is a 5.12kWh SOK 48v battery.

When powering a load with both AC and solar I'm at 76.5% efficiency. 577W/(255W+499W) When powering a load off solar only I'm at 92% efficiency. (155W+274W)/467W

Any ideas what could cause such a drastic difference?



randallemarshall asked
randallemarshall commented ·

3 Answers

Unstable Microgrid Multiplus II - Fronius


Multiplus II 48 5000, Cerbo, Fronius 501 @ ACOut, no feed in,


Fronius: - set to MG50,

Multiplus II:

* programmable relay and general flag assistants are used to ignore AC In1 if SOC >50% not ignore if SOC <30%;

* PV inverter support at last position in assistant list.

Fronius is connected via WIFI to Cerbo and it looks as it should.


Cerbo is showing: Fronius 350W, AC Load 105W.

The issue is that the battery state changes from charging with 900W to discharging with 700W couple of times per second. BMS shows similar values.

In this stage ESS assistant is not an option.

Somebody has this issue before, is there a fix for it ?

popnic asked
popnic answered ·

15 Answers

Was sagt der Wert im VRM Portal oben rechts bei Total solar ?

Was ist das für ein Wert ? Kann den nicht zuordnen.


davidfg asked
davidfg commented ·

1 Answer

Multiplus 2 expected noise

I know there are a few threads already but I am curious if there are any experiences for the noise of the multiplus 2 in the following setup :

  • One multiplus 2 3000
  • 2 Pylontech us2000c batteries
  • Charging via smartsolar
  • Installed in parallel to grid with power to grid with Ess and only ac in in use (=if battery is full and my consumption is lower than the production, the delta should be put to grid)
  • No additional inverter or DC loads
  • Em24 to measure the current consumption

Questions :

  1. If I install the multi plus in a basement below my living room, separated by one (normal) door: would you expect the noise to be audible?
  2. Under which circumstances/operating mode do I have the highest noise (charging, inverting? I heard a lot about noise when charging which is confusing me as the smartsolar is not audible..)
  3. Under which load does the noise start? (1kw? 2 kw? Always?) reason : if e.g. Noise starts at 1kw I could limit the power to grid to 1 kW if my current consumption is lower. I could live with noise when I am e.g. Cooking, but not in normal operation.

Thanks a lot for any response,

Br timo

techmuc asked
techmuc edited ·

0 Answers

MPPT 75/15 wire terminal too small for 6mm²


I have a MPPT 75/15 and the specs say the terminal fits a 6mm² cable. I tried that cable size and it does not fit. Without a wire end ferrule it may go in but just and it is a hassle, some strands being bend and staying out (not good), with a crimped ferrule of the correct size (it tried two types) there is no way this fits.

I have some pre-crimped cable from the solar panel (this is a kit) and the ferrule there look like a size too small and it is a 10 gauge wire which is slightly smaller than 6mm² as well. And even that barely fits.

So what am I doing wrong? Do I need to switch to 4mm² cable? It is only the 1.2m length from MPPT to battery, but 6mm² cable is what I have....

Thanks, regards,


OR asked
npm108 edited ·

6 Answers

EM24 Ethernet - lockup issue

Hi Everyone,

I am running an ESS, everything fine, BUT: My EM24 Ethernet is regularly losing the connection to the LAN. This is not a DHCP issue or such, it clearly hangs.

After disconnecting the EM24 from power (cold restart) it works again, but only for 1-2 weeks.

I would like to update the firmware and then see whether the problem goes away. This is just a way of saving time from further troubleshooting.

My problem is: Nobody will help me to get newer firmware. Victron Dealer says to contact Carlo Gavazzi. They say to contact Victron. And Victron says to contact the Dealer. Stuck in a loop.

Anyone here to help my get new firmware for the EM24 Ethernet?

My Device is a EM24-DIN.AV2.3.X.E1.X


teemischer asked
hofy edited ·

27 Answers

VRM Widget - use the same scale for values with the same unit.

Hi, a suggestion to the developers.

The widget in VRM is very handy to group and compare values by the user in the VRM portal, however it ends up in having a different scale for each data set, what is very confusing / frustrating.

It would be easy to pick a common scale for data rows with the same unit. (Volt, Ampere, °C, Liter or whatever) If the data sources have the same unit, use a common scale factor. Would make things much easier and user friendly!

Thank you for considering.

johanndo asked

0 Answers

Lorawan VRM Setup

I have connected a Lorawan module to my MPPT charge controller with the hope of seeing some useful information on the VRM tool. When I started the VRM tool I was able to add the Lorawan module and the app shows "Status OK" under My Installations. But this was over a day ago now and I don't see any more information.

Please can someone advise if I have done something wrong in the setup? Is there some other settings needed before the module and VRM can start reading/showing data?

Many thanks!

ccraven asked

0 Answers

Notstrom mit einem Multiplus II auf L1 nachrüsten

Hallo Community, ich möchte mit einem Multiplus II und einer Batterie Notstrom im Haus nachrüsten. Mein Elektriker möchte sich nicht in die Thematik Victron einarbeiten, würde mir aber alles so anschließen wie ich es möchte. Für mein Verständnis nun meine Fragen: L1 wird vom EM24 auf einen LS 50A geführt, dann zum AC-in, vom AC-out1 auf einen FI/LS 40A und von diesem dann auf den bestehenden Klemmblock, an dem vorher der L1 direkt nach dem Stromzähler geklemmt war? Eine weitere Änderung der Hausverteilung ist nicht notwendig und bei Stromausfall habe ich den allen Unterverteilungen auf allen LS die auf L1 liegen Notstrom? Wenn der Multiplus ausfällt, dann habe ich kein Strom auf L1? Gibt es dafür eine Lösung? Benötigt der EM24 irgendeine Absicherung, da er ja direkt nach dem Hauptzähler angeschlossen wird?

timomario asked
Jens Rephöhler answered ·

2 Answers

Skylla IP-65 Not Charging

I have a Skylla IP-65 single output that is one year old. A couple of weeks ago, it stopped charging.

I can connect the charger to my AGM battery banks and wake up the display by pressing Setup, but nothing happens on the display (it stays dark) when I turn AC power on and off.

I have checked both AC and DC fuses, as well as incoming AC power. The power is 127V (normal for my marina) and all fuses are good. I also disconnected the battery temperature sensors but nothing changed.

When connected to 12V, I opened the setup menu and reset to factory defaults, as well as cycled power on and off. I also set charging mode to Power Supply Mode. No change in output.

I removed the cover and tested for voltage on the circuit board. I was finding 80 VAC on a couple of points on the board. When i measure across 12V output and disconnect the batteries, the voltage slowly goes to zero, which I assume is output capacitors discharging. My conclusion is that perhaps the switching supply is faulty?

Can you suggest another step in troubleshooting?

abarrow asked

0 Answers

multiplus 12/1200/50 not charging and not switching to AC-IN when shore power connected

When applying AC in (Grid shore power) relay toggles periodically. IN CHG-only mode it goes into fault after a number of relay toggles.

Charger is configured as default LiFePo4 with VE.configure

Connected battery is a drop-in 200AH LiFePo4 voltage is at 13.1V SOC 40%

I have an Orion connected to the engine it charges fine with 28A.

Have tried reducing the charge current to 10A no diff.

Have tried disabling charger no change.

Inverter is working fine.

Any ideas what could be the issue?


mitoki asked
Alistair Warburton answered ·

2 Answers

Cerbo GX ESS Mode 2 Intermittent Code 2 "Connection Error"

I have a Multiplus-II, SmartSolar MPPT, with a Cerbo GX for the brains. I've written an ESS mode 2 control program that runs on a dedicated Raspberry Pi. The program queries the Cerbo on a one-minute cycle using Modbus TCP, sleeping between queries, and gets an intermittent code 2 (Connection Error) communicating with the Cerbo several times over the course of a 24-hour day.

The error has shown up at all times of day and generally lasts for 10 minutes or less. I know the Raspberry Pi is still online because that's how I access it during the error. I know the Cerbo is still online because I can see it on the router. I suspect the Cerbo is not locked up or rebooting because it still feeds data to the VRM portal while the code 2 is going on. My program has code to retry querying the Cerbo up to four times over the course of 12.5 minutes -- all the retry loop does is reissue the "read register" request, it doesn't close or open the connection.

Any ideas? All firmware is current as of this date.

jm0278 asked
lifeingalicia answered ·

1 Answer

3x10kva output dips on grid connect/disconnect

We have 3x 10kva Quattros in a 3phase connection working with a Fronius Symo 8.2-3-M inverter. There are multiple loads (aircons, PC's, wash machines and more) that reset every time a grid failure and grid connection is made (load shedding). We have never seen this before, any help?


  • UPS function is ticked
  • Low Disconnect was recently changed to 205v and reconnect 208v (as advised by some)

janjan asked
Alistair Warburton commented ·

0 Answers

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