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Two-signal assistant uninstalls itself


A few weeks ago I installed a Multiplus 12/120/3000-16 and LiFePo4 cells with Electrodacus SBMS0. I have upgraded the firmware on the Multiplus and installed the Two-signal assistant to let the SBMS0 be able to control charging/discharging from the Multiplus. Everything works fine, but as soon as I turn the Multiplus off and back on, the two-signal assistant seems to be uninstalled, because the Multiplus flashes indicates temp sense error, and the SBMS0 is no longer avle to controll the Multiplus. I then need to reinstall the assistant again and everything works fine until the Multiplus for some reason is turned off again the next time.

Is this normal?

sailor77 asked
Guy Stewart (Victron Community Manager) answered ·

2 Answers

Assistenten AND / OR

2. Wie kann ich zwei Assistenten Verknüpfen (UND / OR) ?

AC2OUT OFF bei UBatt < 44V OR AUX1 OFF

AC2OUT ON bei UBatt > 46V AND AUX1 ON

Alternativ UBatt --> SOC


rodenberger asked

0 Answers

Self Consumption without ESS


Electrical engineer here, heavily DIY oriented, trying to understand "the Victron ecosystem".

I want to build a Backup and Self Consumption power supply system for some of my house loads.

ESS "Optimize for Self Consumption" would be almost perfect for me, but unfortunately ESS is completely out of the question due to grid regulations.

Grid outages happen about 5 times per year.

I am considering a Multiplus II 48V / 3 kVA inverter, 10 kWh Winston LiFePo4 (16 x 200 Ah cells) and a two-signal BMS. I could afford to go for 4 x Pylontech US2000 boxes if it's worth the extra cost...

I also have room for 10 - 12 PV panels (250 - 300 Wp each) and a SmartSolar charger.


1. When the grid becomes available (on initial power-up of the system or right after a grid outage ends), charge the batteries from the grid up to a nice, crisp, 100%. After this initial grid-supported charging, DO NOT USE GRID TO CHARGE batteries, until after the next grid outage.

2. After this initial charging, only PV power should charge the batteries.

3. During normal operation, when battery SOC drops below 50%, stop discharging and switch loads to grid.

4. When PV power becomes available and battery SOC rises above, say, 60%, switch loads from grid to battery and PV.

5. If grid is down, support the loads from the battery down to, say, 5% SOC.

Can these requirements be met with Victron Equipment? What additional hardware do I need? Is a CCGX really needed? Are there any Assistants that can make the inverter behave like above?

Additional requirement (6). About half of the grid outages happen during the winter. Heavy snow + aerial power lines do not go well together. It also takes the most time to be fixed, due to bad weather. So...I also need to connect a backup generator into this picture. Would go nice with requirement 1, I should be able to fully charge the batteries during the day and run on battery power during the night. :)

Many thanks in advance!

mondeoman asked
Daniël Boekel (Victron Energy Staff) commented ·

4 Answers

Gaarne hulp bij instellen van een BlueSolar 150/85 op een Quattro 24/8000

Door omstandigheden kan mijn leverancier mij niet helpen. De BlueSolar laadt nu alleen mijn accu's op, dus als die vol zijn, gaat mijn zonnestroom verloren. Ik weet hoe ik met Remote VEConfigure de instellingen kan wijzigen, maar welke assistent heb ik nodig ? (ESS, PV Inverter Support, Self Consumption Hub-1 of Hub-2)

De bedoeling is dat ik optimaal gebruik maak van zonnestroom, ik heb een generator of walstroom als er geen of te weinig zonnestroom is.

blackjack asked

0 Answers

HUB1 for Solar Priority in RV?

I have a 30A service in my camper. I do not have an "inline" generator (meaning, it is not controlled by anything... I have to actually go out and turn it I do have 600 watts of solar on the roof with a Smart Solar 100/50 MPPT, a Multiplus 12/3000/120, 210 Ah of Lion Energy Safari UT1300 LiFePO4 lithium batteries and a Cerbo GX. I also have a BMV712 keeping an eye on everything for me!

When not out camping I keep my camper plugged into a dedicated 30A plug at my home and continue to use some items in the camper. My goal now is to prioritize solar to maintain a charged battery bank, and then provide as much solar power as possible to run any loads inside the camper as needed. On the occasion that the solar does not provide enough power, I would then like for the shore power to kick in and *supplement* the solar power to meet these goals. I have no desire nor the hardware necessary to feed back any power to the grid, so this will only be for self consumption.

For reference, I am not a licensed electrician and only have a basic knowledge and understanding (but am happy and eager to learn!)

To accomplish this goal I was told to run the ESS assistant along with DVCC, however, when researching these options, I realize that Victron does not approve the use of ESS or DVCC in a camper/RV. After bringing this up I was directed towards the (old?) Self Consumption HUB1 assistant.

From reading, it looks like this is exactly what I want to do, however, it appears many functions of the HUB1 assistant have been deprecated. So, my questions are now geared towards this assistant...

1. Should/can I still use the Self Consumption HUB1 assistant to accomplish my goal? Is it still functional?

2. If I can still use this assistant, what country code should I use to enable the assistant? I am located in North America/USA and when using the "fake target with full options" to simply play with the settings rather than programming anything into my actual system just yet, I see no listing for North America in the country code drop down box. Is there an option for North America or USA when inputing the real assistant (not the fake version) in my actual system, or instead do I select one of the "Other" options... and if so, which one?

3. When going through the HUB1 assistant screens, under the "System" screen I have to choose a battery, but I am not sure which one to choose. As I mentioned, I am using Lion Energy Safari UT1300 batteries which does have an integrated BMS in each battery, however, I don't think this type of battery choice is on the list. The only one I see that may be close is the "System uses LiFePO4 batteries with a two signal BMS" however I don't think that this is exactly what my batteries are... so, which option do I choose?

4. In the "Policy" screen, the last option "Connected to mains, no feedback" sounds like the choice I need, is this correct? Also, I notice this one doesn't have the "DEPRECATED" stamp behind it, which makes me think that this is still a useable option that can be chosen?

5. Skipping over to the "Battery State Inputs" screen, how would I need to fill those blocks out? I assume I would need to use the T Sense wire that came with the Multiplus for this? For the record, I don't have this wire attached to my Multiplus at this time, instead I have the VE BUS Smart Dongle attached to the Multiplus, which as I understand it, the Smart Dongle supplies the Multiplus with both temperature and voltage information. But, should I use the T Sense wire instead, or can I just stick with the Smart Dongle? As well, what information do I use in those 4 drop down boxes? Will I have to program a relay??

I think this will get me started. And as I stated, I am not an electrician, and I am just learning all of this as I go. If you have any questions, or if I did not provide enough, or the correct information, please let me know what I need to provide in order to get this figured out. Thanks!

chad-poindexter asked
meschmid23 edited ·

3 Answers

Feature Request: Relay Assistant to include Low/High Voltage Disconnect values when required.

Can the following feature be added to the Relay Assistant when selecting AC input either available/not available.

When programming a Relay Assistant using the AC Input criteria it only gives the option to select AC available/not available. In situations where the AC drops to below the configured AC Disconnect value of the Multi the Relay Assistant does not activate.

I've programmed, and tested, this on a basic system with no assistants. If the grid voltage drops to below the AC Disconnect value then the ACOut 2 relay disengages as per design.

I then program a Relay Assistant to do exactly the same, and selecting AC not available for 0s and AC available for 120s. The behavior, when the grid voltage drops to below the preset AC Disconnect, value is to NOT disengage the ACOut 2 relay.

*Note: On a total Grid Failure the Assistant works as designed. It's during a Brownout (below configured AC Low Disconnect value, and I suspect above the AC High Disconnect value also) that this does not work.

Some Captured Data:



*Note: The ACOut 2 Relay 'State' is wired to a Digital Input on my GX to capture state changes used in this investigation.


*Note: The 235V blue line represents the RMS value of the grid voltage, not peak value, it's only drawn there to illustrate the differences between the Grid RMS and the wave during brownout RMS value.


Ingo asked
Ingo commented ·

0 Answers

Safety Switch at Aux Input of an Quattro

Hello everyone,

My problem is that I have connected an emergency stop switch to the aux input of an Quattro. When this is pressed, the Quattro goes off. However, when the switch is unlocked, the Quattro restarts automatically. Is there any way to prevent the Quattro from restarting automatically?

tobias-endress asked
Alexandra answered ·

1 Answer

Narrow Boat Solar Setup with EasySolar

Hello everyone,

I have had a read through a load of the forum posts here and I am still unable to fully understand so hoping that someone could help me here.

So I'm trying to utilize the solar output as much as possible, but am unable to use the Self Consumption or ESS due to being on a boat. I don't quite understand the reason why though.

I have an EasySolar 24/3000/70 which is connected to a 330AH battery bank. There is a 24/12 Vicrton DC to DC converter which is running the 12 system. I have TV, Fridge etc running off off the 240V. I have up to 909W of solar connected to the MPPT. I also have waiting to be fitted a 24V 80A Sterling Alternator to battery charger waiting to be fitted.

From what I have read, as I am in the UK, I do not require a separate anti-islanding device and can rely on the one in the multiplus. As I do not have any PV Inverters connected on the AC IN, it just connects to the galvanic isolator and then the shore connection.

Ideally i would like to use the Self-Consumption Hub-1 - No Feedback assistant, but obviously due to seeing the warning about not using it in a boat I am worried about doing so.

What I dont understand, is how if I enable this assistant, it would work any different to the way it is working now accept the Multiplus would be the source with the AC IN being used as power assist depending upon the amount of solar. The Multiplus is monitoring the AC in and will switch on if it is there, after the monitoring period and switches off if it is disconnected. I assume the assistant would still do the monitoring so this would be the same.

So is the reason why you cannot use it on a boat due to in most countries needing to use a separate anti-islanding device, which adds in the latency, or is there another reason that I have missed, that in this setup the MultiPlus would not disconnect the AC IN as quickly?

Many thanks for any assistance here.


simon-forester asked
Alexandra edited ·

1 Answer

Putting +12V on Multiplus input signal

Could be tricky to explain this question, but here goes....

The Multiplus's have signal inputs - Aux 1, Aux 2 and Temp, depending on model. I am working on an EasyPlus 1600 so I just have the temp sense input.

I am using assistants to read the sense input and set behaviour depending on if the input is open or closed.


I have a pair of wires connected to the temp sense input and when I connect them together, the assistant does as it should - but now the question ...

Is it ok to connect +12V to one of the inputs and then connect +12V to the other input to close the circuit? (I want to control this via a programmable relay and switch setup for semi-automation and the way this is setup, it will be easiest to use a 12V signal into the sense port )

wildebus asked
wildebus commented ·

1 Answer

Assistant - General Flag stopped working

I have a Multiplus II 48/5000 (Early H/W version)

Venus GX 2.65~8

Now I was on FW471 (all working fine and have just upgraded to FW481 (using the new remote Upgrade in beta test just to test the new feature, - I dont think the new update feature procedure is the cause however I mention it just in case)

Since the FW update to 481 it seems that the General flag is not working very well

I can no longer get the AC1 IN to open when using general flag

The Fig 1, Is my Normal assistant settings

I have now removed ALL assistants except the General Flag set to ignore AC input 1

As you can see in Fig 2 AC 1 IN is fully active and AC1 IN is not turning off

Now last night on the new 481 Fw AC1 IN did turn off at 7pm (thats when the update occured to 481) (this bought the issue to my attention) (Flat battery bank this morning)

The assistants for ess and the solar current sense are working fine (when installed)

Any one got any ideas ??? as to why the general flag is not working.

I have not got FW 471 here at home so cant roll it back and test.

if anyone has a copy of FW471 2626471.vff please send it to me

Fig 1


Fig 2


Paul B asked
Paul B answered ·

2 Answers

High DC Ripple - 3x Multiplus 2kVA and 24V lithium battery

Good day,

I have a 3x Multiplus 24V working as threephase system with 6x lithium battery 24V in parallel and a Fronius 3kW.

Nowadays the system is showing Error 60 (Battery high ripple voltage) once a day.

The wiring from batteries to inverter is ok.

When the error occurs, the battery voltage drops ~0.5Vcc.

The system have been programmed with and without ESS assistant and PV Inverter Support.

Someone else have this problem? Is there a solution?

allan-silva asked
Alexandra commented ·

1 Answer

Interlocking AC-Out2 with AC-In possible?


I'm using general flag to ignore AC and some other assistants. I'm wondering if it is possible to switch AC-Out2 off BEFORE AC-In comes available and on again AFTER AC-In gets cut off.

I want to use a Fronius which isn't allowed to be connected to the grid

Thank you!

kind regards,


porcini asked

0 Answers

Dc charge current regulation

Just noticed that there's a serious lack of flexibility in the programming of the "Dc charge current regulation" in the MultiPlus assistants.

I'd like to have full charge when AUX2 is CLOSED and no charge when AUX2 is OPEN. But the assistant only allows it the other way around. WHY?

Thanks again for any help on this

offroadflow asked
offroadflow commented ·

1 Answer

Can the MultiPlus Compact temperature sense input be used for the Two-Signal BMS support assistant?

I am designing a system with a Multiplus Compact, which unfortunately does not have the two aux inputs like its larger siblings. For this design to work I need to provide a charge enable input using a third party BMS. In the past I have done this easily with the aux inputs and the Two-Signal BMS assistant. Is this possible with the Compact?

nate-costello asked
Paul B answered ·

1 Answer

Can I change the Quattro AC OUT 2 Time delay?

Is it possible to change the delay which it takes for AC out 2 to go live?

I have contactors which are being driven by AC OUT 2, but when the grid or generator input is live (after a mains failure or return) it takes around 2 and a half minutes for AC2 to go live, and hence close the contactors... Is there any way to change this to 30 seconds for instance?

ewalderasmus asked
harold commented ·

3 Answers

Quattro Assistant Setup

Good day everyone.

I am struggling to set up my assistants on my 8kVA quattro, and was hoping that someone could help.

Need: To reduce the time that AC2 takes to reconnect after mains fails/gen starts and assumed load and Gen/Mains returns.

For instance, when mains is lost AC2 is turned off, and only after the generator is running for a minute and a bit does it get turned back on. I know this is to allow the generator to start up and get to speed, but it does the exact same thing when mains returns. For instance, when mains returns it first turns off AC2 transfers the load from the gen to the inverter then to mains, and then again after a minute or so AC2 is turned back on.

This time is too long for me. Ideally, I would like it to be 30seconds or so form when the generator assumes the load and 10seconds when mains returns.

I have tried to use the Assistants (Programmable relay) to make this happen but the issue I am having is when mains returns and the gen is running. It doesn't turn off AC2.

Can anyone help or give me a simpler solution on how to implement this. I have tried now a few combinations of assistants which have not worked for me, I will put images of my attempts.

On a side note, I feel like this should be a setting in an update, a simple time-based setting which users can adjust to change how long it takes.

Assistant set 1:


The result of this assistant set was:
1. When mains failed (ACin1) and the generator (ACin2) wasnt running ACout 2 was turned off.

2. The generator (ACin2) turned on (triggered by the Venus).

3. Roughly 30 seconds later ACout 2 was then turned on.

4. When mains returned, the system was overloaded as ACout2 was not turned off during the change over.

Assistant set 2:


The result of this assistant set was:
1. When mains failed (ACin1) and the generator (ACin2) wasnt running ACout 2 was turned off.

2. The generator (ACin2) turned on (triggered by the Venus).

3. Roughly 30 seconds later ACout 2 was then turned on. (so far all going perfectly)

4. When mains returned and the unit attempted to do the changeover, but it was noted that ACout2 as still on, hence it would have overloaded if more appliances were running.

Assistant set 3:


The result of this assistant set was:
1. When mains failed (ACin1) and the generator (ACin2) wasnt running ACout 2 was turned off.

2. The generator (ACin2) turned on (triggered by the Venus).

3. Roughly 30 seconds later ACout 2 was then turned on. (so far all going perfectly)

4. When mains returned and the unit attempted to do the changeover, but it was noted that ACout2 as still on, hence it would have overloaded if more appliances were running.This was exactly the same as the previous assistant set.

5. It was noted that if the gen was not running, and mains restored then ACout2 would engage 30 seconds after it is present. So as it stands I am having issues with ACout2 turning off during the change back scenario, where ACin1 and ACin2 are present together.



ewalderasmus asked
ewalderasmus commented ·

3 Answers

What is the right setting Low Battery shut down Muliplus 12V

The default inverter settings 'DC input low pre-alarm' and 'DC input low shut-down' from the Multiplus 12V/80/2000 are very low.

DC input low pre-alarm: 9,3V and DC input low shut-down: 10,9V.

What are the right settings for Victron super cylcle AGM accu's?

agnieta asked
captrevere answered ·

3 Answers

Change from Mastervolt to Victron Lithium and need for an assistant

Hi, I am changing from a Mastervolt Victron mixed system into a full Victron system (yacht). In a nutshell:

- Up until now I have had a Multiplus 24/3000 charging 3 parallel Mastevolt Lithium 24/160h mk1. It has worked very well over the years: the Multiplus reached float phase and limited charging autonomously. There was no intelligence from the batteries controlling the Multiplus too stop charge
- Now the Mastervolt batteries are tired and I wanted to change into Victron batteries (Smart 24V/200Ah) .

My question is: why would I need and assistant to drive the Multiplus?. Wouldn't the Multiplus just read the voltage and change into float when required? I don't want to overcomplicate things.

Note that the safety relay is another topic which I totally understand. Any light on the issue most welcomed



fchurtic asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

Using 2 Multiplus's in Split Phase configuration, Need 2 wire Assistant and would like to accept 30A service (one leg power).

Every time I allow each inverter to attach independently to power source I loose the assistant and every time I add the assistant the inverters lock together again?

treejohnny asked
Paul B answered ·

1 Answer

Can the PV inverter support assistant be configured to start ramping down at 57.6v instead of 54v?

At the moment the absdorption saying is 57.6v for absorption but the PV inverter support assistant ramps down Fronius when the batteries are at 54v so it takes far too long to charge the batteries under solar. When the generator is on, it will charge at 180amps until 57.6v then go into absorption then float as it's supposed to but when it's under solar it will charge at 180amps to 54v then ramp down considerably so even though the charger wants the power the PV inverter assistant won't allow it. Can the setings be changed in the PV inverter support assistant to chasnge it from 54v to 57.6 as per the charger setting?

daren-connor asked
Paul B commented ·

1 Answer

Solar AC connected output when connected to a multiplus or Quattro controled by a Assistant

I am looking for a assistant that can control the Aux1 or W1/W2 relays Or AC2 out based on the Solar output reading, Has anyone constructed a assistant that can control any of these output relays.

Or has anyone got another suggestion.

It would be a nice assistant to add to the standard range of victron assistants

Paul B asked
Paul B edited ·

0 Answers

Remote VEConfigure Upload - Quattro #6 DDC Program Error

I have a system of 3 Quattro 15k configured in 3Phase, a CCGX, BMV-700 and AC-out coupled PV on-grid inverters.

Yesterday I wanted to change charger settings in VEConfig of each Quattro so I downloaded the VE.Bus using Remote VEConfigure and changed the settings on each of the Quattros within the VE.Bus remote file. Of course it required a VESoftware tools update and within the VEConfigure, ESS assistant update. I updated successfully.

Interestingly, after the update, ESS assistant settings were not the same in each of the Quattros; the Master had all the settings, but the Slaves had fewer setting pages. (Anyone knows if normal? why?)

After setting changes, I closed+saved the VEconfigure and VEBus tools, and went on to upload the updated file via Remote VEConfigure. First trial returned an error, second as well, and the third trial just crashed and froze on one stage of the upload. After a checkup on site, the system was shut down, with a beeping sound, flashing LEDs and Quattro #6 DDC Program Error alarm on CCGX (attached photos).

My problems:

  1. I checked on site CCGX and VRM portal, the connection seems up and running online, however I cannot connect to the CCGX nor the device Remote VEConfigure, and Victron Connect app, it shows the system "offline".
  2. I have to solve this solely remotely, online, since I don't have specialized personnel on site with the necessary tools
  3. Error 6 DDC seems a problem in the assistant and needs a VE.Bus firmware update. How can I do this remotely online when my connection seems to have a problem?

Urgent support is needed with thanks.

@Johannes Boonstra (Victron Energy Staff) can you please jump in for suggestions


Nazareth Kevorkian asked
Paul B commented ·

2 Answers

2 Signal BMS Assistant for Unconventional use

Writing in hopes that someone in the community may have experience with the implications of employing the 2 Signal BMS Assistant on a Non-Lithium system.

Specifically, I am working to commission a pair of Quattros which have some unconventional demands. In particular, there are times when the devices should perform as Chargers only, and times when they should behave as Inverters only.

While I do not see a convenient way to orchestrate this through direct means, it can be seen that the 2 Signal BMS assistant would realize this exact demand.

Is there a way to arrive at the same commands without misappropriating this Lithium assistant?

bdahlmann asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

ESS assistant charges and discharges the battery continuously when there is not enugh PV, why?

I know that my question pretty much describes what the ESS Assistant should do.

But is there a way to prevent continuous charging and discharging?

My AC loads are mutch higher then what my PV is generating, this is why the ESS Assistant draws current from the battery until my desired SOC is reached but then it swiches of the inverter and is slowly charging the battery with PV and after charging 5% above minimum SOC the inverter turns on and quicky emtys the battery down to minimum SOC. Since my AC load is always greater than what I can generate with PV. It would make much more sense to feed the generated energy directly into the grid to help power AC loads. There is no ecess power, so why always charging 5% of the battery and then quickly emtiy the 5% at maximum current.

I would prefer a constant output power when the AC Loads are higher then what i can get from the PV and then only store excess power in the battery.

Thank you for your Help.

felix-vt asked
layesp answered ·

5 Answers

Is there a list of suported "Two wire BMSs"

Recently I was told here, that my 123SmartBMS Gen3, that I payed over 600 Euros for, is not supported by Victron.

My problem with the Multi turning itself OFF for no apparent reason is not related to this BMS but it looks like I will not get help with this problem because I have "unsupported" BMS.

My question posted here, was moved to "Modifications Space" because my BMS is unsupported.

Is there a list of supported BMS-es that use "Two wire BMS" assistant?

marekp asked
marekp edited ·

2 Answers

Problem with 2 wire bms assistant in ESS system allow to charge 'no' also stopping discharge

Hi im having issues with the 2 wire BMS assistant when used in one of my ESS installations, when the BMS signals to stop charging it is received by the quattro and charging is stopped but discharging is also stopped and it sends the quattro into idle mode even though allow to charge is still 'yes' and can be checked in the quattro. Any help would be appreciated. Thanks

jacko asked
jacko commented ·

1 Answer

Marine charge current and shore power breaker control with CERBO GX

I have a recently installed Victron system consisting of two Multiplus units running in parallel, a BMV712 battery monitor and a CERBO GX.

The system runs wonderfully but I need to limit the charge current while the engines are running since I have a large engine driven alternator. I also need to limit the shore power breaker size setting when plugged into shore power.

I can perform both of these functions using Assistants in the Multiplus units, but that is not without challenges.

My first question is can I use a digital input on the CERBO GX to limit charge current in the multiplus units?

Can I use a digital input on the CERBO GX to change the shore power breaker size setting?

If the answer to those questions is No, then I have another couple of questions.

If I use an assistant on the Multiplus to use a digital input to limit charge current, does that assistant require a separate dry contact to create the same function in the slave multiplus? Or will the master Multiplus communicate with the slave multiplus to limit charge current from that one as well?

The other question is if I use an assistant on a multiplus to change the shore power breaker setting does this take away my ability to change the shore power setting from the CERBO GX display?

Thanks!, and here is a VRM screen shot of my system as configured.


blskevin asked
blskevin commented ·

3 Answers

Clarification on Assistants - When to use ESS or PV inverter assistant when grid is usually not available?

I am installing a AC / DC Coupled system with Quattro, Fronius Primo & AGM batteries, I fully understand the rules and how to go about sizing and installation, that has been completed. However, I am a bit un-cleared on the right assistant to use for the setup.

The installation is not off-grid but the utility supply is very erratic, may not be available at times in weeks, I fully understand that for a off grid system with AC coupled inverter, the PV assistant is recommended but since the utility power may be available at times (even though there may be very long outage) can this system be setup with ESS assistant even though the utility power may not be available most time.

Thanks for the guidance as I am thinking of setup as ESS, Is there any demerit in this system being setup as ESS?

@mvader @Johannes Boonstra @Guy Stewart @Matthias Lange - DE

olamobile asked
Alexandra commented ·

1 Answer

AC Current sensor power too high


I have an AC current sensor monitoring the Solar power from my inverter but the reading is always too high. The inverter is 6KW so I have configured the AC Current Sensor DIP switches to 7kW. When its full sun outside the inverted display is reporting around 6K but the remote console via the assistant is reporting around 7.4kW. This error is consistently around 20% too high, ie, at 1k of generated solar is reported at 1.2K.

I have a Multiplus II 5kW, Venus GX and ET112 energy meter. I can even see how the algorithm works, assume my export is currently 0W, batteries are fully charged, the AC sensor is reporting 2K solar generation, it does a simple calculation that I'm using what's left over - ie 2kW of AC loads in my house. But I'm actually not and I've tested this, during a sunny day my inverter reported 6kW, the AC current sensor reported 7.4KW and loads were 2.5K, I turned every MCB off and the AC loads dropped to about 2KW, I then turned the inverter off and Solar plus AC loads dropped to 0W. I can see each time the sun comes out my Solar PV on the Remote console jumps up along with my AC loads jump up.

I've tried:

Rewiring it (no change)

Moving other AC wires away from the outside of current sensing loop to avoid interference (no change)

Changing the input from AUX to Temp Sens (no change).

Changing the DIP switches to a lower power setting as the sun was setting - this reduced the level of error and DIP switch 2 seemed to be all or nothing.

I've concluded that the AC current sensor is faulty - feel free to suggest otherwise.

Based on the fiddling around I've done, I think that if the assistant's expected full power could be changed from 7.5KW to 6KW then it would solve my problem or at least make it more accurate.

Sorry this is a bit long winded leads me to the question:

Is there a way I can edit the 7.5KW value in the AC Current Sensor assistant?



nicd asked
nicd commented ·

2 Answers

Charge Current Control Assistant not Functioning

I have a Quattro 48/8000 which runs with an MPPT BlueSolar Charger and CCGX.

In VE.Config settings, I configured the ESS assistant and, as per genset loading and grid power limitation requirements, also set 2 charge current control assistants (after the ESS). Both have fixed DC charge current limit on batteries when either AC input 1 or 2 is active. I have set the limit to 60A. But I have noticed lately that this limit is never respected, neither on grid power (ACin1) nor generator power (ACin2). DC charge currents are reaching up to 80A.

What could be the reasons for this and how to solve it?

- Does ESS have the priority over other assistants, it being the first on the list?
- Are they conflicting with each other, so none is operational?
- Firmware issues?
- "Overruled by remote" feature conflict in General>Shore limit settings?

@Johannes Boonstra (Victron Energy Staff) your input is much appreciated.

Nazareth Kevorkian asked
Matthias Lange - DE commented ·

3 Answers


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