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Cant change Settings for COS phi on QUATTRO 15K at Grid-Code VDE-AR-N 4105:2011-08

Dear Community,

- i have a 3-Phase Quattro 15K with ESS-Setup. (Firmware 497)
- Living in germany required me to setup a external NS-Protection by using Ziehl UFR1001E to comply with VDE-AR-N 4105:2011-08 or VDE-AR-N 4105: 2018-11

- As it is required by my local Network, i need to comply to some settings like for COSϕ, as it is described in DIN VDE V 0124-100 (VDE V 0124-100):2020-06.

- I know the QUATTRO 15K is certified to comply with ...
--> VDE-AR-N 4105: 2018-11...
...based on Test defined in ...
--> DIN VDE V 0124-100 (VDE V 0124-100): 2020-06. “Network integration of power generation systems – Low voltage"...
... by ...
--> Certificate-ESS-VDE-AR-N-4105-2018-11-Quattro-48-8000-110,-48-10000-140,-48-15000-200.pdf

Here comes the Problem:
- VE Configure 3 just offers me Grid-Code VDE-AR-N 4105:2011-08 and within this Grid-Code i also can´t make any changes, e.g. to COSϕ




How can i either change settings on values like COSϕ (as it is for example possible in other Grid Code... (Here TOR Erzeuger Austria..)


...or how can i get to select Grid-Code...

--> VDE-AR-N 4105: 2018-11 (with external NS-Protection) ... like i have seen it in Screenshots in in a different Post....
Screenshot with QUATTRO having VDE-AR-N 4105: 2018-11

.. where i assume i will automatically comply to the right settings defined by my local network provicer (like COSϕ .. settings)

daschlichi asked
daschlichi answered ·

1 Answer

Grid overvoltage causing issues with batteries ESS

I have a Multi II 48/10KVA 230V with a Fronius Primo (AC Coupled) and MPPTs connect to Pylontech US3000C batteries x 10.

The residencial area has a lot of solar and occasionally, the voltage on the grid gets to 253 which is the discconect limit on the Spain grid code so correct functionality. That is, at 253V, it disconnects from the grid.

The problem is this generally occurs when the batteries are fully charged and exporting excess power. Disconnecting causes the excess power to go to the batteries which are already fully charged and causing a battery overvoltage alarm.

It appears that the problem is caused because of the time it takes to ramp down the Fronius Primo and the 2 x MPPTs.

My feeling is that this is going to become an issue in many areas as solar grows and the grid is forced to up their voltages due to feed in.

I am thinking of changing grid code to one which accepts a higher overvoltage setting (UK for example) but wanted to know if anyone else has solved such issues and how it is solved. Suggestions welcome.

ponzoa asked
Alexandra commented ·

0 Answers

Cerbo GX "Grid failure monitoring" only works in "inverter mode"?


When enabling "Monitor for shore disconnect" in Cerbo GX I only get alarms when my MultiPlus is in "inverter" mode if shore power is lost.

If I set it to "charge only" I get no alarms when when shore power is lost.

What could be the cause of this? It would be really nice to have the alarm in "charge only" mode also.

Is there another way of monitor for shore disconnect when the MultiPlus is in "charge only" mode?


Joel Nordahl asked
Joel Nordahl answered ·

2 Answers

Use Solar 'overcapacity' to connect Mppt 100/20 Load to a grid-tie inverter

Since my camper is parked near my house, it seems a littiebit of a waste not to use the solar-panel for another purpose than solely keep my battery healthy. So I thought: When my battery is topped-up I want to be able to switch the output to my grid tie-inverter. I thought I could use the LOAD-output of the Mppt for this purpose. Is there anyone who did this? I it correct to do it? The product I have is the Victron SmartSolar 100/20 12V

harryt asked
sereen answered ·

5 Answers

PV Inverter Always Shows 0 Watts on Dashboard

Hello. Attached inverter is a ABB UNO-DM-5.0-TL-PLUS-US on the AC output of two MultiPlus 24/3000/70-50 120V in a split phase configuration. The ABB inverter is communicating via sunspec protocal to Venus OS v2.93. AC totals shows the correct output power but the dashboard always shows zero. Is there a way to fix this? It's been several years and I can't find a solution. Thanks.




BlueTrepidation asked
BlueTrepidation answered ·

2 Answers

multiplus 2 draw from grid when battery are full

Hi, i just switched my instalation from multiRS solar to Multiplus 2 5000 with a 150/50mppt.

The whole system is controlled by a cerbo gx and pylontech batteries with DVCC.

I setup the ESS ( i think corectly) evrything seemed fine, when battery are 100% it feed grid with solar.

The problem is when i turn something huge, like air conditiner, it seems to draw some high current from the grid. To be clear it work from solar for few sec, then draw from grid, nothing from batteries, even if they are full...

By the way i know that pylontech bms is "stoping charge and discharge" when 100%(it's what was displayed on the Multirs solar), but with the multiplus2 it doesn't display anything so i don't know if its the pylontech bms wich cause this.

-4x US2000C pylontech 50ah each total 100A max charge and discharge

-DIY battery 300ah conected in paralel with pylontech

-Multiplus 2 5kVa


-MPPT 150/60

All have last firmware (tried beta firmware with cerbogx, doesn't change at all)

Thanks for your help, here a picture of the event


gabius asked
gabius edited ·

2 Answers

Multiplus ESS, one MP2 for full ac coupled ESS, two and three only for charging


I'm planing a new Victron ESS system in the near future. Currently running one MP2 ESS AC coupled with 3 Phase SMA PV and two Victron MPPT (grid export) at another location. So I know how that combination works.

The now new planned system must handle a 28 kwp SMA PV system and a 45 kWh battery. I don't need backup power or anything on the AC Out of the MP2s. I only want ESS AC coupled with grid point to 0 for 0 energy costs (in the summer times a least). Neither are MPPTs planed at the moment... 28 kWp AC coupled solar is plenty for now. My plan for now is:

- Get three MP2s 5000 (one Cerbo or one MP2 with GX included...)

- Set one MP2 as ESS single phase (like the system I already build just for grid point 0)

- Set the two other MP2s as charger only devices

Is this possible? Having three MP2s but using only one for single phase ESS and the two others only as charging devices?

Why the hassle? Im living in germany. Energy cost isn't cheap here and having the three phase ESS running all the time will cost quite a bit. Also we are regulated for a max different load on different phases at around 4.6 kw. So I can't just buy one MP2 10000 or 15000 and call it a day. And charing a 45 kWh battery just with one 5000 unit will not cut it either on some days when the sun is only out for a couple hours at peak power.

In particular when I

a) dont need backup features other than maybe the router and a NAS system hanging on one AC OUT of the main MP2 and

b) I don't need more than 3-4 kw max power to balance out the grid point to zero.

Knowing that, I think keep running the other two MP2s all the time for doing like nothing is unnecessary.

If my thinking isn't possible, are there other options. Like charger only devices which can communicate with victron systems? I searched at that topic already for quite a while but haven't found anything usefull. Only some regular charing devices which then would need to push there information via modbus to the victron system which would include some manual coding... Also buying two MP2s just as charing devices isn't cheap either. All in all in the end the project is propably more a fun project than actually saving money.

So im just curious if something like that is possible or if im having other options?


hanspeter123 asked
hanspeter123 edited ·

0 Answers

Utilité et avantage d'une sonde de courant extérieur ?


je suis nouveau et je voudrais savoir quelle l'utilité et avantage d'une sonde de courant extérieur

J'ai installé 4800w de panneau solaire

un multiplus 2 48/8000

4 batteries 12volt 220ah en en serie

un gx

2 mppt 150/70

J'ai suis couplé avec le réseau

je suis en mode ESS maintient charge batterie

Merci d'avance de vos réponse

bmves76 asked
Thierry Cortassa (Victron Energy Staff) answered ·

1 Answer

Multiplus II with no grid feed


I want to use 3x Multiplus II 5 kw (3-phase) in my solar system and I am not sure about grid connection. I want it work this way:

1) If batteries are more than 20% use power from batteries.

2) If batteries are lower than 20% use energy from grid (just to power appliances, not to charge batteries)

3) If batteries are 100%, turn off MPPT or lower MPPT out power to match just my appliances demand.

4) Most important, never feed anything back to grid, because it's violating rules of our grid provider.

Can Multiplus II work this way or I need different device?

PS.: All other devices in setup will be also Victron (MPPT, Cerbero...)

Daniel Suchý asked
matt-bowler answered ·

3 Answers

Multiplus triggers RCD in off-grid mode

I'm preparing my multiplus II to connect to the grid and put my critical loads behind AC out 1.

Until now my multiplus was in parallel with the grid without load on AC out 1. (ESS is configured)

Today I linked my critical load behind AC out 1, multiplus was not connected to the grid but it did trip my RCD 30mA.

If I switch my bord back to the grid also on a 30mA RCD it doesn't trigger. I switched it back to the multiplus and it did trip the RCD.

What could be wrong here ?

rns asked
sharpener commented ·

3 Answers

Victron ESS + ET112 = slow response


Recently I've installed ET112 grid meter on my system (which was using CT sensor previously) and I've noticed that the Multi is very slow on response to load. Currently my system looks like this:


The grid set point is set to -10W. The multi needs a good 15-18 seconds to stabilize after large load kicks in and another approx 15s to stabilize after load drops off. Check the video from VenusGX (the load is switched on at about 16s of the clip and switched of at 43s of the clip):

Is that how it should be? The difference in the load is just about 1.4kW, why is it taking so long to handle that?

Previously I was using CT Sensor extended with Cat5e cable to over 25m long, the system looked like this:


The response to load was pretty much instant. I've recorder video using the same load as on the previous one (load switched on at about 10s and switched off at 23s of the video):

The system need seconds to stabilize

Also you can see a clear difference on the Grid use graph from VRM portal:



As you can see, with CT sensor the system is very close to grid set point, with ET112 grid meter it is way off and hardly ever stay close to set point. The situation is even worst during cloudy day when PV power is fluctuating (you cen see it on my other youtube video).

Is it normal behavior? It looks like Multi can handle this load easily, the problem seems to be in the feedback from the grid meter (or algorithm when ET112 is in use). Is there anything I can do to improve this reaction time??? Please advice.

Kind Regards

mysik asked
usernamepasswordbs answered ·

24 Answers

Slow Switchover when grid fails.

A recent customer installation, a 10kVA Quattro with 2 x SmartSolar 250/100, 30 x 275W poly modules and 19.2kWh Lithium batteries, running on ESS - the first grid failure resulted in their TV, satellite decoder and computers shutting down and having to reboot. The switchover should happen within 20 milliseconds but it took more like 250 milliseconds, lights dipping visible to the human eye. Any suggestions?

bruce-kirk asked
nickdb commented ·

2 Answers

Multiplus II Grid and Generator switch over

Hi, I have searched options on how to do this but none of the seem to fit what I’m trying to achieve.

I have:

Multiplus II 12/3000

Cerbo GX & touch screen

Lynx smart shunt and distributor

2x 220Ah AGM batteries

These are installed within a box trailer which we use for racing karts, basically transport and accommodation for when we camp at the track and somewhere to cook & eat.

I have some 230v outlets plus DC Distribution serving lights, compressor, 12v outlets etc. AC inlet rated at 16A for connecting either grid or generator dependant on what’s available.

Sometimes we will have a grid hookup available, other times we will have to use a generator ideally via auto start assistant so need to have flexibility on power source.

I’m wanting to be able to use either a physical switch via one of the digital inputs or a switch on the touchscreen to swap between grid and generator modes.

Mode 1 - If grid is available we plug in and select grid on the switch, the MP then passes AC through and charges the batteries, with AC current limited to 16A.

Mode 2 - no grid connection is available then we plug in the generator, the MP then runs inverter from batteries and auto starts the generator when required via generator assistant - eg low soc, high load etc. As the generator is only rated at 3kva then the AC current is limited to 13A.

I know there is an assistant to switch the current limits via a digital input but I can’t find anything that will change the priorities between AC and DC sources.

Any help or ideas would be greatly appreciated

aston asked
bigbadbob76 answered ·

2 Answers

ESS with DVCC and DC-coupled PV surplus injection buggy?

Hello All,

I am facing an issue with my system, which is made of the following :

Multiplus 48/10000/140/100, Fronius Primo 8.2-1 on the AC out with 12kwp solar panels, 75kw Li-ion battery pack on CAN BMS, and an MPPT150-35 with 1.2kw solar panels on the DC side. An external EM24 ethernet meter is used. All are to the latest firmware.


The system is configured as ESS, with limited injection, and DVCC is ON.

And now the issue :

When I activate the DC coupled surplus injection in the ESS settings, the Charge Voltage Limit (CVL) is not anymore followed by the system. Instead, the batteries are charged to CVL+0.4V. This seems to be "normal", as per Victron DVCC operating manual. However, when there is no more sun, the batteries are discharged to the grid at the limited power defined in ESS/Grid Injection settings, until the battery voltage reaches CVL.

With DC coupled surplus injection de-activated, the battery charges to CVL (not more), and there is no grid injection from batteries when there is no more sun.

Request (please) :

Since I did not find it, is there an option to avoid draining battery in the grid with DVCC and DC coupled surplus injection activated, and remove the +0.4v offset? Otherwise, it would be of great use to add it.

Thank you,


tranzorb asked
ondra answered ·

5 Answers

Grid consumption/injection through Modbus or MQTT

I just bought a MultiPlus II, a Cerbo GX and a battery with the objective to charge the battery during off peak hours and use it on peak hours.

I do not have the EM24, but as I'm a Home Assistant user, how can I supply to my Victron the grid consumption / injection through Modbus or MQTT? On the end my idea is to emulate the an EM24 through Home Assistant

Thanks for your support

jag asked
nukem rolled back ·

3 Answers

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