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AC PV Coupling

VRM & remote console - PV CT sensor data disappearing & reappearing after a GX reboot

Another issue now, the PV generation data on the VRM portal & the PV 40A addition in the remote console keeps disappearing in both. The only way to get it to come back is to reboot the Multiplus in the remote console (GX side) and wait for it to reappear, only for it to disappear again an hour or so later. One day I might have a fully working system as expected. Please see the below video.

Jason - UK asked
Jason - UK answered ·

1 Answer

Victron ESS system with PV inverter not charging the battery

Hello I have a Victron SolarEdge system with the PV inverter being the main source of PV power, the battery in the ESS system is not charging the battery. is there a setting that i may have missed

i have installed the SolarEdge Modbus meter on the AC in side to limit export as there is a Prepard meter aswell. the PV inverter only supplys the load and does not charge the battery. the PV inverters are also connected to the AC out of the quattro so that the inverters come on in APS mode as well

nathan-hodgson asked
shaneyake commented ·

0 Answers

SMA 3000TL PV Wechselrichter an Mulitplus II mit Pylontech Speicher - welches Anschlussschema

MultiPlus-II-to-MultiGrid-and-MultiPlus-comparison-DE.pdfSB3000TL-KDE110715W.pdfHallo an die Runde, ich bräuchte einen fachlichen Rat.

Ich möchte meine PV Anlage umbauen und für Notstrom austatten. Zur Zeit läuft sie über 2 SMA 3000TL, je 14 Module a 240 Watt (3,36KWp), Anschluss an 2 Phasen mit Zweiwegezähler und Eigenverbrauch.

Ich möchte gerne den WR der an Phase 1 läuft über einen Multiplus II 48V 3000 steuern, und zwar so dass der 48V Pylontechspreicher US2000 (4x2400KWh) immer PV geladen wird und nur Stromabnahme von der Heizungsregelung (ca. 200Wh) als kritische Last permanent max. versorgt werden soll (Notstrom).

Überschussstrom soll weiterhin eingespeist werden.

Ich habe mal die WR Daten sowie die möglichen Anschlussalternativen die mit dem MPII möglich sind als Anlage angeheftet.

Ich denke das das optimale Anschlussschema das auf Seite 7 wäre, betitelt mit ESS AC PV an Ausgang1 und Stromsensor (Messbereich des Stromsensors: 0 - 32 A)
ACout2 von Verteilerkasten.

So wie ich das verstehe benötig man den Stromsensor für die Messung Bezug/Einspeisung. Oder irre ich da ? Würde dieses Schema auch funktionieren, wenn der 3000TL keine Internetverbindung hätte und somit vom GX nicht gesehen werden würde ? Ist eine Internetverbindung zwingend nötig ? Oder wie sieht der MPII den 3000TL ?

Ich freue mich auf Eure Antworten. Vielen Dank schon mal für Eure Hilfe.

prosolar24 asked
holgerble answered ·

1 Answer

Unsupported PV-inverter (Growatt) and grid-failure in ESS setup with Multiplus 3-phase

I have a setup where there are 3 Multiplus running in three phase mode connected to the grid in a ESS setup. As PV-inverter we have a Growatt 7000TL3-S connected on Line out of the Multiplus. And it works fine as long as there is a grid conntected, but on test with Grid failure it does not work so well, the charging is very intermitent. Could there be any way to setup the PV-inverter to support this or do we need to install some other component to get this working properly? There is offcourse the option to change PV-inverter, but would like to see this as my last option... ;)

Henrik Känngård asked
Henrik Känngård commented ·

1 Answer

Powercontrol prioritization

I'm about to get AC current sensors for grid (Victron external sensor) and for AC PV (Victron ac sensor) next week.

If I've understood correctly, this makes my Easysolar 2 GX aware of AC PV grid feed and I can utilize it to charge my batteries or power my "critical loads" or AC loads that are in my ACout (I've just now come to assume that without a "real" grid meter I cant really see them separately?).

However, I'm not sure if this will lead to also battery power being expended for my non-critical ac loads where I wanted to only use excess solar for them? Is there another measurement for ACout or how will this work out after all? Is it in any way possible to use both the external AC sensor (as "grid meter") and the internal one in ACin (critical loads)?

Kari Saaranen asked
Kari Saaranen answered ·

3 Answers

3-Phase Multiplus-II ESS with Enphase - current sensor placement

I am planning a 3-Phase ESS with 3 MultiPlus-II, a Pylontech battery and would like to attach an AC coupled photovoltsic system with Enphase microinverters because of shading issues.

As long as the grid is available, the diagram below should work and Envoy would sense battery charging like another consuming device. Due to the built in backup capability of the MultiPlus-II it is not possible to place the grid-side current sensors the usual way between battery system and cutoff switch As soon as the grid there is a problem with the grid and MultiPlus-II cuts it off, the current sensor (light blue in the diagram) is cut off as well, so Envoy has no means to control the supported Solar energy.


My concern is that the two systems MultiPlus and Envoy could counteract and hinder each other doing their job.

Can this sensor be placed that it works with and without grit?
Could Envoy get the current sensor data directly from the three MultiPlus-II?
Is there a direct way to control Envoy or the Microinverters from MulitPlus-II or Cerbo?

(This is my first post in an energy community and im not firm with the termIndology epecially in English)

K.G. Friederich asked
juergenal answered ·

3 Answers

PV Inverter Assistant - unbalanced PV


In the PV Inverter Assistant it says 'Each phase must have the same solar power installed'

So what happens if it is not balanced? If the 1:1 rule is adhered to on each phase will it be ok?


stevo07 asked
pvmaker commented ·

0 Answers

Looking for the right product for my setup

Hi - I recently started to add multiple strings of PV-panels to my house. They are all using the same setup: 1x Hoymiles connected to 4x Trina Vertex panels. Currently I have two of these strings installed with 3.2kW/p combined - I’m planning to eventually add two more strings of similar configuration.

I was wondering which product from Victron will be the best fit to actually monitor incoming power vs. generated power from PV, charging a battery with the overshoot from PV and also be able to provide battery power up to 3kW/p to the house.

I’m currently looking at the Victron Energy MultiPlus II GX family.

Looking forward to your advise.

Thank you,


cm0815 asked
cm0815 answered ·

4 Answers

Quattro/BYD/GX/Fronius - High Voltage Alarm when reaching 100% SoC


I got an AC coupled system installed about 3 weeks ago. Quatrro 8k, Fronius 8k, GX and BYD LVS Premium 24kwh. Grid is available between 0 and 6 hours a day, very random, and we could go 10 days with total grid outage. Configuration made by the installer is ESS with "keep batteries charged".

Things are running as expected, except that I am worried about two things that I think are related. High voltage alarm from BYD whenever it gets to 100% and the delta between cell min/max once the SoC is at 100%. Here's an example from today.

SoC reaching 100% at 9:11


Increase in min/max cell voltage, and the delta stays large as long as the batteries are not discharging:


And I also get the alarm (visible on the GX as well in the notifications):


Here's an example from yesterday showing the delta while SoC is 100% for a longer period. I reached 100% yesterday, through Grid in the early morning hours, then discharged a bit, then 100% again once the sun rose.


I don't mind sharing my exported config from vrm or any data that might help to understand what's happening. There are some days that I don't get the alarm, but the delta is always there. I read in different posts that this is normal for new installations, but I would assume after 3 weeks, I should be seeing some improvement?

I also read somewhere to keep the batteries at 100% for a week or so. Grid wise this is impossible. I could run a generator for that long but the cost would be very high.

micmak asked
micmak answered ·

3 Answers

Energy meter AC loads - PV = grid


I have two energy meters ET112's. Grid, PV array and loads both on AC in.

If the meter on loads is set to grid meter (wrong for mysetup) the ac loads is calculated as follow grid + PV = AC loads.

However it doesn't work if energy meter is set to AC loads ie AC loads - PV doesn't equal grid in VRM.

Is there a way to do this?



matt1309 asked
shaneyake commented ·

1 Answer

How to set the battery voltage where PV Inverter Support Assistant starts rising frequency

I'm using a Multiplus II offgrid setup with cerbo gx and pylontech batteries and want to add a Fronius Symo to AC-OUT 1. Pylontech has a absorbtion at 51V and float at 52V. According documentation of the assistant ( the assistant will start rising frequency at 54V. With this configuration it will never rise frequency for Pylontech batteries.

How can I reduce the voltage at which the PV Inverter Support Assistant will increase the frequency appropriately for Pylontech batteries as well?

Is it possible to configure via DVCC?

Michael Scholze asked
Rob Duthie answered ·

1 Answer

Multiplus II didn't stop charging

I have a multiplus II not connected to the grid and a PV pannel grid inverter connected to AC1

I selected lifepo4 as tarting battery type but changed the settings absorprtion voltage to 55.2 and float voltage also to 55.2. The inverter kept charging to above 57V until the cell over protection kicked in.

I'm I missing a setting here ?

These are the settings. Screenshot short after the overvoltage kicked in (voltage is still above 55.2V at this moment)


rns asked
klim8skeptic commented ·

5 Answers

Solar PV generation meter - can this be used with the Multiplus for recording system generation?

I currently have a secondary electric meter on the outlet of the solar PV inverter measuring the amount of generation. As a generalisation, can this meter be used in conjunction with the Multiplus 2 GX for recording the solar PV input into the system as opposed to a 40A current sensor?

Can these meters have an output that can be utilised by the Victron systems for recording power generation and if so does anyone have any experience in making this option work?

My basic understanding is its a no as I think I am correct in saying the meters only have a pulsed output for recording energy consumption in kWh and not power in kW in real time, but thought to ask before dismissing the idea.

Jason - UK asked
Jason - UK edited ·

0 Answers

Victron/Fronius AC Coupling

My current system consists in a Victron Quattro 10k with a Fronius Primo 8.2 connected on the Ac_out of the Quattro, a Victron 3 phase smart meter (wanted to see the parameters of all 3 phases, still using one phase only from the grid). And yes, batteries and a Color GX and running ESS.

I’m planning to add a Fronius Symo 10k on the Ac_in, and yes, only phase will be used by Victron, while the other two, either to charge a car or just sell it to the grid. Now the question: would the ESS assistant be able to control the Symo when it comes to grid export? Currently I cannot export more than 8kW in total. Of course I can ask for limit increase from the grid company, but I would avoid this if possible. Or do I still need also a 3 phase Fronius Smart meter to regulate the Symo output?

cristimv asked

0 Answers

Why AC-coupled Fronius is FQ shifted OFF when only one phase is missing?

Strange situation.

Today one phase (L3) in my 3-phase grid vanished.

System switched to inverting but AC-coupled Fronius immediately reported state 105 and switched off.

I did not expect this since battery was at 57% SOC, loads where around 900W and expected Fronius's production should be around 600W (it was 10AM and cloudy). There was no need for FQ shifting. I calculated the expected Fronius's production from MPPT production that was going on without problem. MPPT was producing 360W and there is 10/6 power ratio between Fronius and MPPT.

At that point I switched grid off with the main switch. Now all three phases are gone.

Fronius restarted and begin producing as much as expected.

Around 3PM I flipped the main switch back on to see if the missing phase is back.

Immediately Fronous stopped with the "ERROR" on the display and refused to turn on production with the state 105 reported. (Phase L3 was still missing)

Turning the main switch off again "fixed" Fronius's problem and it started producing.

My questions are.

When system switches to inverting because 1 phase is missing how this can influence the AC-coupled Fronius?

What is different between 1 phase missing and all 3 phases missing?

Obviously something is different, but what and why?


Can someone explain to me, why is my AC-coupled Fronius frequency shifted now to the point that is completely OFF?

There is enough load from the house and half of the 20kWh battery waiting for the energy. MPPT chargers are working and Fronius should produce almost 800W with the sun available.

I think there is a bug in the MP-II firmware or ESS assitant that prevents AC-coupled inverters from producing when only one phase is missing.


And here the proof.

After disconnecting my system from grid completely, Fronius started producing.


marekp asked
marekp commented ·

3 Answers


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