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ESS system Pylontech battery Alarm – High voltage Alarm


I keep getting an alarm/warning every 14 minutes via the CCGX for the following:

Pylontech battery Alarm – High voltage warnings – Voltage reading attached to each warning varies between 51.56V through 51.77V

This alarm pops up during the absorption phase. I.e. absorption light is lit on the Multiplus ii 5000 and a status of absorption charge is indicated on the SmartSolar Charger MPPT 250/100.

As per previous reply from Guy on a “DVCC and Pylontech Battery” community post, I understand that a Pylontech managed lithium battery does not have a bulk, absorption and float stage like a lead acid battery. However, during the bulk phase, the 4 US3000 Pylontech batteries charged up to 80% without any alarm. Charging has now slowed to almost nothing. Current SOC is 81%

All the Victron components run the latest available firmware as detected via the CCGX and VictronConnect App. The current firmware versions are as follows:

CCGX – v2.53

Multiplus ii 5000 – v471

Charge controller – v1.46

I have loaded and configured the ESS assistant and configured all settings as per these two documents:



I have made sure that the Multiplus II Charger Tab settings for Float voltage is set to 51V and that Absorption is set to 52V after completing the ESS assistant as per documentation. After I started receiving the high voltage warnings, I have also tried setting Absorption on this tab down to 51V. This makes no difference.

I understand that the charge controller settings are ignored and controlled by the CCGX via DVCC

DVCC is ON, Shared Voltage Sense is OFF, Shared Temperature Sense is OFF.

Any assistance to resolve this problem would be appreciated.

Thank you,


@Guy Stewart (Victron Community Manager)

JeanMc asked
JeanMc commented ·

1 Answer

System Alarm Grid Lost

For a few days now we've been getting a system alarm that says "Grid Lost." I can highlight it on our CCGX screen, but it doesn't go away. (I.E. The warning triangle in the top of the screen keeps flashing no matter what I do.) It also does not register on the VRM site under Alarm Logs...

We have not lost grid power once in this time period.

I do however use the CCGX's relay and it's automatic Generator on/off rules to tell the Quattro when to pull power from the grid. (I do this so we can use the energy stored in our batteries first.) So while the Shorepower meter shows zero, we are still connected to the grid.

We also have a PV inverter connected to our Quattro's 230v output, which gave me a grid error once, but I've not seen that happen again. (Meaning it might have but then went away before I noticed it...)

Did something change in the firmware to cause us to get this alarm?

We were running 2.51 but it also happened when I updated it to 2.52.

Thanks to anyone that can help!


ScottNelson asked
Harold answered ·

3 Answers

Multiplus/EasyPlus Issues: Grid Lost & High Temperature Warnings

Marine EasyPlus install with CCGX.

Issues after last firmware upgrade (469);


As mentioned elsewhere here, the latest firmware versions have addressed excessive fan running time and things seem to have gone from one extreme to the other. Our fan used to run ALOT. Now our fan NEVER runs! We have never had a High Temp warning before. We assume that the new frugal fan program is to blame. It is Australian summer here so ambient temp was in high 20's (deg celcius) but we have had the unit for several summers now and we believe some sort of compromise is needed with the fan program or we fear more warnings and possible damage due to unit high temp.

The more persistent problem is the 'Grid Lost' Alarm. Again these are happening after the firmware upgrade (done so we could access VDCC). We run grid/mains/shorepower into AC Input 1, charge our FLA bank from the mains and atm exclusively use the boiler AC thru-put AC circuit to power our mains kettle etc. We have no ESS tied to grid etc.

When the alarm goes off we have tested the marine shorepower receptacle with a hair dryer and it works fine. The CCGX AC1 Input screen of the multi tells us that shorepower is available ie 240ish volts and 50hz but something has triggered the alarm and cut off grid to the unit even though grid is available.

The issue seems to go away if charger only switch is selected but I can't be sure, it maybe coincidence.


This shot was taken just at the grid was reconnecting but the AC-in L1 had zeros in the Amps and watts boxes but the 244V and the 50.1Hz was showing even as 'Grid Lost' was sounding.

I see that other posters here have had 'Grid Lost' alert whilst still connected to the grid... hmmmm.


shars.p asked
shars.p commented ·

3 Answers


Elke dag vanaf 3 minuten voor het halfuur hoor ik drie of vier zoemende geluiden. Het begint om 3 voor half elf en gaat enkele uren door. Ik heb een SmartSolar mppt controller 75/15. Houdt Victron de wacht?

Arto69e asked

0 Answers

I overloaded 12/800 it alarmed. I reset, then did it again. No lights now. Internal big fuse is unbroken.

I tried resetting a few times. I charged batteries for not very long and reset. I will check in engine bay for breaker and check fuse, not done yet. But wondering if anyone has any other suggestions? Many thanks

AnnaBanana asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

Constant overload warnings on multiplus using ess

I have a case with a 5 Kva multi using 5kwp of pv capacity. Has 3 x us 3000 pylontech Life batteries. Using ESS and feeding back to grid. On a daily basis without any significant load. (Max 3.5 kva) the system recieives multiple overload warnings in the Vrm advanced page. This appears to be in the day only and normally afternoons . Could this be related to too much power feeding back to the grid through the inverter. If so what are my options to reduce or remove this condition. Do i need to throttle the PV output.. Is the PV likely to be causing this problem or is is only load output related.

Gary c asked
Gary c commented ·

1 Answer

warm lopen quattro 48/10000

hallo ik heb een victron quattro 48/10000 dit woord erg warm en de koelventilatoren draaien enkel als ik er een hoog vermogen doorstuur indien het vermogen laag is loopt de temperatuur hoog op zonder dat de interne ventilatoren beginnen de draaien weet iemand hier raad mee

m vg

harald asked
Paul B answered ·

1 Answer

Ve.Bus Warning Overload L1 as air conditioning starts.

Should I worry? I assume this is due to compressor inrush current. The Webasto BlueCool unit cycles at about 50% duty cycle every 6 minutes and uses 13A at 230V continuous. The warning clears after 20 seconds and only happens maybe a dozen times a day with no noticeable negative effects. Power Assist is set at 14A and comes on every cycle since the background load is usually 2-8 amps. This is on a parallel Multiplus system with two 12/1600/70 so there should be 6000W (26A) plus the 14A from shore power for inrush (40A total). I have Boost Factor set to 1.3 and UPS and Dynamic Current Limiter off as supposedly required for my Panda generator (not using generator right now as I am on shore power).

kdagley asked
ben answered ·

1 Answer

VE.Bus ShortIDs

Hi, I have an installation which is showing the following error message very often and I can´t find any information on the web: VE.Bus System [261] - VE.Bus ShortIDs


Does anyone know what this means?

Thanks in advance.

Tony Towers asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

Quattro 10k Temperature Alarm

Hi all - we have an off-grid system with 10kWp of PV (2xSunnyboy 5000TL's), a Quattro 10kW and 12 x BYD batteries all working really well most of the time, unless its really sunny. In the summer the system generates a VE Bus temperature alarm about midday and shuts down before restarting a few minutes later. This can happen 3 or 4 times over the course of 20minutes and then the system functions normally. The BYD BMS reports no problems so it looks like the Quattro is overheating when there is a lot of solar power available.

How do we check this temperature and what is the threshold for temperature alarms in the Quattro? We have tried to improve air flow around the unit but this hasn't helped.

On the VRM we can only see the BYD temp so there doesn't seem to be a way to easily see what temp the Quattro is. The batteries charge from a generator from 10% to 100% with no temp issues and we dont want to restrict the charge rate as we'll use more diesel when the generator is running. Its currently set to 100A which is less than the maximum for this unit. Genset is on AC In 1, PV is connected via a fuse board on AC Out 1 .

Could we add a fan on one of the relays and if so how do we configure the temperature threshold to start it?

ess_solar asked
Daniël Boekel (Victron Energy Staff) commented ·

2 Answers

Using large load variable control

I wish to use a 3KW Immersion heater on my 5KW Inverter and control its power using a variable control...... As you would dim a light bulb. The inverter makes a humming noise and I am wary of causing damage.

Has anyone got experience of this usage please and any comment?

John Roberts

John Roberts asked
WKirby answered ·

1 Answer

Multifrid overload warning in ess


Today my MG 48/3000 running latest FW and latest ESS-assistant generated an overload warning as I pulled about 5 KW in my phase compentasted net parallel system (FW 2.22 on venus gx). From vrm log I can see it pushed about 2556W into grid at phase 1. It generated that much warnings, that it got suspended from email push notifications.

The question is, why does it actually generate so much power, that it could cause an overload warning by itself in ESS? With a cos phi of 0.8 it may be possible to throw a warning at 2400W=3KVA. This would be reasonable.

So is it ok, to ignore the warning until I get an alarm? Actually the warinings in the Multi are disabled, but the vrm portal seems to receive it anyway. I do not want to disable warnings in general but this is...

Do I need to be concerned in OL conditions, or will the multi shut down / go into passthrou, if something becomes critical? It should stay a little while with up to 6000VA consulting the datasheet.


SteffenP asked
SteffenP answered ·

2 Answers

Multiplus 24/3000/70/50 temperature warning

Hi there,

I have a Multiplus 24/3000/70/50 inverter/charger that is coming up with temperature warnings.

I understand that these may be genuine warnings and/or alarms but I am wondering if there is a way to monitor what the actual temperature of the inverter is in degrees c.

Can you also tell me what the actual warning and alarm points are ie in degrees c?



dsedgman@gmail.com asked
mvader (Victron Energy) answered ·

1 Answer

Spurious inverter temperature warning?

I have a generator connected to AC2in on my Quattro 15KVA. The generator is turned on by Venus GX to charge a battery automatically.

Each time the generator is shut down (when the battery is finished charging), the Quattro throws a Temperature Warning event that then goes through the VRM alarm rule ("Automatic alarm monitoring") and ends up as an email/text message on my phone.

Just one second later, the Quattro then clears the Temperature Warning.

This happens every single time, no matter the actual temperature or anything.

1. Is this normal? Why would the temperature of my Quattro change so suddenly?

2. If this is just a spurious warning that is to be expected and ignored, is there any way in VRM to configure it to wait a few seconds before escalating a warning? Or maybe there is some other way I can filter out this type of false warning.


ben asked
ben commented ·

1 Answer

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