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Error "COC" on PWM LCD & USB


We have an error "COC" on two client's installations on the same product PWM LCD & USB 10A. I can't find the problem.

I have few informations.

Installation n°1 : 30W Mono Victron Energy + 10A PWM LCD & USB (photo)

Battery Voltage : 12,3V

PV voltage : Unknown

Installation n°2 : Complete kit (115W mono VE + 10A PWM LCD & USB + 60Ah GEL VE + 12V 250VA VE + 6mm² câble for every connection)

The client can't takes the voltage but she said that the error came even there is only the battery connected

Fisrt connection, the client connected the battery then the solar pannel even the order of connection was good the battery start to boil.



MyShopSolaire asked

0 Answers

Multiplus Compact 12/2000/80 - Shuts off during charge

A cmp012202000 is connected to 100Ah LifePo4 battery.

Setting the Multiplus to charge turns on the right blue LED (mains on) and the yellow LED ( bulk) on the attached multi control panel. After 10 seconds or so, the fan comes on, and another few seconds later, you hear a lot click, the LEDs go off (the digital display of charging AMPs set to 8 atm stays on).

Sometimes, when the yellow absorption LED is on, the charger operates continously.

Also, if I change to On (instead of Charge), it will turn off as well. First both blue LEDs are on, than all are off.

I am desperate, sitting here on a campground with the need of a working setup.

posde asked

0 Answers

MultiPlus-II 48/5000/70 continuous overload shutdown

MultiPlus-II 48/5000/70 is shutting down continuously with an overload error after some issues on the grid network.

Batteries are full and the external grid is off (as the mains circuit breaker failed). BlueSolar Charger MPPT 150/70 is connected and providing power (as the sun is up...)

Now the MultiPlus keeps trying to start up, but fails within a couple of seconds with an overload error. However, the circuit breaker towards the load is off as well, so there literally cannot be any load on the inverter at all.

Is this a bricked MultiPlus or is something else going on?

Tried a lot of stuff, including restarting the system through the Color Control GX as well as with the on/off button itself.

Anything else to try?

The system is installed in the south of France, and I'm asking for someone else, so troubleshooting is going to be a pain.

thijs asked
Lykke answered ·

7 Answers

5/48 Multiplus2 Overload and temprature LED solid

Good day

I have a 5/48 Multiplus 2 with 4 x us2000 pylontech batteries connected.

I cannot get the inverter on, it keeps showing a solid OVERLOAD and TEMPRATURE LED?

What can cause this?

This is an Off Grid system

Gerrie asked

0 Answers

Help with Overvoltage Error #38 when in ESS

I replaced my solar panels and upgraded to two Victron SmartSolar MPPT 150|100-Tr Solar Charge Controllers. I had two 100/50 controllers previously. The system was and is hooked up with a Victron Multiplus 12/3000/120-50 120V running in ESS. This is all installed in an RV.

Now with the 150/100's, when shore power is plugged in I am seeing the Charge Controllers eventually shut down with error #38 Over Voltage error. This did not happen with the 100/50 controllers. I've made sure that all settings on the controllers and Multiplus are set to a 12 vdc system with 13.6 and 14.4 to be the charge levels for the 400 AH's of BB lithiums I have.

So far my troubleshooting has been:

  1. Shut down and restart system (2-3 times)
  2. Ensured all firmware is latest
  3. Ensured all assistants are the latest
  4. Set Multiplus charge voltages to 13.4 and 14.2 (same error occurs)
  5. Tried un-networking from BMV-712 (same error)
  6. Removed ESS and run with and without shore power
  7. Reinstalled ESS assistant and settings back to original

I'm still getting the #38 error after about 20 minutes on one controllers and then about 5 minutes later on the other charge controller.

Does anyone have any suggestion as to what I should do next?

Thanks in advance

Todd Wackford asked
Todd Wackford edited ·

0 Answers

VRM downloaded xls data; the counters data has many "a163" special events recorded

I have a Venus GX and download data every month in XLS format. I have activated all 5 digital counters and have "always" over two years, get extra data events which show all rows blank but add "a163" data in one column for each of the 5 counters, without affecting the data in any of the counters after.

My theory is for some reason the Venus GX has some glitch which triggers an event (outside of the normal 15minute data)which has a timestamp and adds data (exports on the Comm data) from some register to the counters "a163" data column but no other data in any column except the time stamp.

The "a163" seems to be random, some days have no reading and others up to 10 or more. I have set data to record every 15minutes.

Any ideas as to the cause and solution?


RayMiller asked

0 Answers

Phoenix Inverter 12/3000 'on' LED flashing and 'overload' lit without load

Any idea of what could cause this error message : 'inverter on' flashing and 'overload' lit. This happens as soon as I switch on the inverter, even with the AC out cables disconnected. If I let the unit disconnected from batteries overnight, I get about 2 minutes of 'inverter on' lit, no overload alarm and then, again without load, I go back to same error status. I have opened up the unit after the problem occurred and visual inspection of all components offers no clue. Connecting other battery gives same problem.
Any lead? Many thanks.

This is a 2012 unit on a sailboat. It has worked fine till now.

Bau asked
Justin Cook - Bay Marine Supply USA answered ·

1 Answer

Error 24 Quattro 48v 15000kva

Hi, my system was working fine, but a few days ago on Venus I had error 24, I read in the error article Error 24: switch system protection started. turn off the inverter and after 4 hours I turned on however we do not use a generator or public network. Today the error reappeared without success for it to work again.


I do not think it was an overload since in the advanced parameters it shows me the maximum power consumption does not exceed 3000w per quarantine


Jimmy Sanchez Huerta asked
Daniël Boekel (Victron Energy Staff) commented ·

1 Answer

How to limit inverter power in ESS system

hello i am new to Victron

we have installed our first Victron system Quatro 10kva with 4 x 300 ah 12.8v Lithium batteries, the system is ESS with grid-connected and possible grid shortages during the day, and 11.52 kwp PV is installed and connected to the system through 2 x 250/150 MPPT chargers.

the situation is that during the midday 10 am-2 pm the solar is reaching 8000-9000 watt the load is about 5000w and since we activated the feedback to the grid so when the solar is high and the batteries are full the system is overloading since the solar is greater than the inverter 8000kw limit but as far as I know it is ok to oversize the inverter since it will cut off the extra power when it doesn't need it, but it is not doing it it is overloading and shutting down.

my question is that is there a situation where I can limit the solar in the setting that stops inverting more than 8000 watts so as not to overload the inverter ??

when batteries are not full it is ok since the excess solar is sent to the batteries and no issues but it is an issue when the batteries are full and feedback is activated the inverter keeps trying to invert the solar even if it is more than the 8 kW

eyub asked
Daniël Boekel (Victron Energy Staff) commented ·

1 Answer

System shutting down when batteries reach around 26 degrees..

We have a fairly new set up on our narrowboat with 2 X 150 AH Lifepo4s. Charging from engine or solar. We are using a relatively low amount of power, and the batteries have barely been below 80% charge. A couple of weeks ago we noticed the system seemed to shut down for no obvious reason. At the time we thought it coincided with new appliances being added, eg a 12v fan or using a new tool/phone charger (via the multiplies). Now it is more frequent and we think is linked to charging and battery temperature. It happens when we enable the solar to charge or when we run the engine to cruise or heat water in the calorifier. And it always happens when the batteries reach around 26 degrees or go above this. The red LED (Cell <4V or temperature) on our VE BUS BMS comes on at the same time. Whatever it is, this doesn't seem like it should be a problematic temperature, but as soon as the system shuts itself down we're then powerless to do anything; either to investigate the issue, or to use basic on board facilities.

Ceridwen asked
JasonTav answered ·

2 Answers

Error LSC or L5C on PWM charge controller


My BlueSolar PWM LCD 12/24V-30A has the error code LSC (or L5C).

Cant find anything.... pls help

thx Reto

Wueeschi asked
Alexandra commented ·

0 Answers

VRM Reporting Error

I'm not sure if this is the right place to put this, but I can't change the fuel price to what it actually is.

It is limited to a maximum value of 5, which when working in Euros (€), Dollars ($) and Pounds (£) I am sure it is perfect, but when working in Rands (R) it doesn't work. Our fuel price fluctuates between R13/l - R16/l, I guess it can always go even higher than that. Is it possible that the slider can be extended?


On a totally separate note, is it not possible to also create a scenario where it generates your actual electricity bill, not a comparison report?

EwaldErasmus asked
Teun Lassche (Victron Energy Staff) answered ·

1 Answer

Quattro 48/5000/70-100/100 120V Bulk and absorption LEDs flash synchronously and Vdc shown at VE Configure monitor is different to the battery actual voltage

Problem description:

After installation the equipment performed fine, completing the battery charging cycle. After the first grid AC power outage it switches to the inverter function and supplied energy from the batteries to the loads for about four (hours). When the grid AC power returns it switched to the charger function but showing continuous LED light in the mains on indicator and the bulk and absorption LEDs flash synchronously (simultaneously). Low battery is shown shortly on startup.


After switching off and on the equipment the error indication remains and the batteries are not charged. After recharging the batteries using an external charger and reconnecting them to the Quattro it doesn’t start using the manual switch.

Using VE Configure III the Quattro restarted and it shows that all default setting are OK. However the monitor shows DC voltage Vdc = 24.9V which is completely different to the 48 V measured using an external voltage meter. The SoC bar I the monitor also shows the battery charged . Bulk and absorption LEDs remains flashing synchronously.


Can anyone provide any orientation about this failure and its resolution procedure?

jrrujano asked
Paul B answered ·

1 Answer

bmv 700 voltage readout different to actual readout at battery terminal

Gauge readout shows 13.84v and at battery 13.91v

Can anyone tell me why as I have lithium set up and need more accurate readings for float etc



gefmar asked
klim8skeptic answered ·

1 Answer

Phoenix Multi Compact 12/800/35-16 Overload Warning and Low Battery Alarm

Dear all, we have recently bought a Multi compact 12/800VA together with a SB SUNLIGHT AccuForce 12V - 150Ah Solar VRLA Battery in order to replace an ONLINE UPS in a on-Grid Photovoltaic 500kWp installation. The system works in 12V mode. The inverter charger is connected to the AC grid and the only load is the Protection Relay (SEPAM) from Schneider Electric installed on the Medium Voltage Switchgears Board. The charging mode is 99% in "Storage" mode cause the load is very little. The problem we are facing is that after two or three days of operating the Inverter goes to fault mode and the alarms we got is overload and today together with a Low Battery Alarm and the PV station goes out of the Grid. The only thing we do when the fault comes is to go and turn off and on the inverter/charger and the problem is (temporary) solved. Today the fault happened, we got a "grid lost" e-mail message, when we reached the inverter the fault was gone (only the green light when on), as it seems the inverter was inverting. We turned off and on the inverter and the inverter "saw" again the AC grid.

Since we bought the inverter we did not do any optimizations or changed any settings for example for the current output (everything is as it came from the distributor). The system also has a Color Control GX and we can monitor the system from the VRM Portal. Please see attached pictures, videos. Any ideas for the fault or settings needed are much appreciated! No clue why thr fault takes place, on the other hand the overload maybe comes because the SEPAM maybe draws a lot of current in order to power the motorized central medium voltage circuit breaker.20200316 Status Monitoring2.jpgfaults.jpginput current limit.jpgMV SEPAM.jpgBattery.jpgGrid connection restore.mp4

trienergiamixaniki asked
trienergiamixaniki commented ·

0 Answers

bluesolar panel voltage during night > 0 ???

I am not sure if this is normal, so my question is to all of you that use mppt bluesolar charger. While the battery is connected to the charger, I can also measure similar voltage on the solar input terminals. This is regardless if solar panels are connected or not. So if voltage of the battery is 50V, on the PV terminals I can measure 50+ something volts also. Same is displayed in victron connect screen. Does your charger displays solar voltage > 0 during the night also? Shouldn't it be 0V during the night? Perhaps something got fried in mine :-/

solar_apprentice asked
Alexandra answered ·

1 Answer

Multiplus Compact 12/1200/50 zeigt schwache Batterie an obwohl 12,7V


habe ein Problem mit meinem Multiplus 12/1200/50. Es blinkt die rote und gelbe/grüne LED abwechselnd. Laut dem Programm VictronConnect ist der Multiplus auf Störung aufgrund schwacher Batterie. Batterie hat aber 12,7V und völlig in Ordnung, es ist eine 100Ah AGM Batterie. Softwarestand des Multiplus ist aktuell, habe ein Update gemacht. Es wird auch nicht der Landstrom weitergeleitet (AC in nach AC out). Weiß einer Rat?

aderksen asked
aderksen commented ·

1 Answer

Lots of problems with ESS multiplus 2 (error 24)

I Installed a multiplus 2 with 10kWh of BYD batteries in an ESS system first half of the year, it worked well for a month or two then started bringing up error 24, I followed the instructions for what to do for error 24 and sent them off to my victron distributor, victron decided to send me a new unit, I intsalled the unit and instantly had the same problems, after lots of return visits and firmware updates in the hope the issue had been found and resolved which is costing me lots of time and money ive realised that the unit will go straight into error 24 with the current sensor plugged in, If i remove the sensor and restart the unit it starts fine then plug it in it begins to act as an ESS system should with no error code, the problem being that i simulated a power cut by turning the AC isolator off and then back on, and as the sensor is in it goes into error 24, i have updated the firmware twice and replaced the unit. Its a real shame as its also costing the customers confidence in the system i have installed for them, and I cant keep going back to resolve this I have seen on the VRM it is in error 24 again today and i went to them on friday. It has the latest 2629 467 firmware intalled and the UK G98/G99 grid code. Please can you sort a resolution for this ASAP.

jacko asked
Daniël Boekel (Victron Energy Staff) commented ·

1 Answer

Victron Phoenix inverter 12/3000 stuck in overload

I left the inverter on overnight and in the morning the “overload” LED was solid red. I thought that maybe overnight there was a shortcut. So I disconnected the load (nothing was turned on overnight) and turned it back on. LED still solid red. Is anyone experiencing the same problem? Or a way to reset the unit? Thanks in advance

Tuyl asked
Tuyl commented ·

5 Answers

What error from Fronius inverter

17Perth_20190819-1000_to_20190819-1507 1.pdfI am getting error in VRM data for the inverter but no code. Normally during the night i would get low pv error codes and the like. but in the day every now and then i have Error but no code.

Multi with a Fronius Primo on the AC out 1. grid. the Fronius is on the router via an ethernet cable. so comms should not be an issue? how can i track down this error message?

attached a sample of data.

Keith Arnold asked
Keith Arnold commented ·

1 Answer

Another overload has occurred with no obvious reason

Quattro 10k with ESS Grid connected / solar / CCGX.

Previous overload switched off system and due to lock out could not be re started without intervention by un plugging CCGX. Freezer contents lost as we were away.

Just now a year later same overload situation. No warnings - system tripped off.

Overload LED lit. Prior to event Voltage was 48v and load was around 500w. System was discharging as it was after sunset.

At 18.00 voltage dipped from 49.90v to 46.40v and current dipped from -11.40amps to -44.20 amps which was the event. Reset the quattro = 50.20 v and 0.10amps then it reverts to 48v and -7.60 amps which is normal.

No errors or warnings recorded.

The only loads to stress system would be well pump/ freezers no other loads with high inrush.

These loads are running all day without a problem.

So what causes a massive dip in current????

freddyuk asked
freddyuk answered ·

2 Answers

Multiplus II 3000 GX External Current Sensor Error 24

Good Evening Victron Community,

I have installed a Multiplus II GX in a topology with all Non-Critical Loads upstream of the AC Input. Critical Loads on AC Output 1 as usual.

When installing the External current sensor on the Main Circuit and returning from an Outage the Inverter gave an Error 24 related to the backfeed relay.

Although the error makes sense to me regarding it seeing Current (from the external sensor) while it was expecting no current (Ac-In relay open) I would think that selecting the External Current Sensor Connected tick box in VEConfigure would tell it to ignore this discrepancy?

I have since removed the Current Sensor (and unticked the tick box) and have tested the exact same outage successfully without Error24.

Although this post mostly serves as a possible bug flag, I would like to end it with a question.

Would it be possible for me to install a three phase Grid Meter upstream of the AC Input and non critical loads (Carlo Gavazzi 65A) instead of the Current Sensor and still avoid this Error 24 Situation?

If yes, would I be able to add an unpowered USB hub onto the USB port to have both an external Wifi adapter and USB to RS485 adapter on the GX portion in order to connect the Grid Meter?

Kind Regards

Randolf Wenhold asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

EasySolar 48/5000 isolates the solar input (Err #38)


I am new to Victron. I have installed the EasySolar in an off grid setup with 9.6KWh batteries (4 x 12V 200AH LiFePO4 - Non Victron - Built in BMS) and upgraded all the firmware.

I have 5 panels in series delivering just under 110V when disconnected and about 10A in short circuit.

When I connect the panels to the unit it doesn't charge the batteries. It issues error #38 input shutdown due to battery over-voltage. I then have to go through the process of resetting the unit.

Any help with this would be appreciated.



mahmm asked
mahmm answered ·

5 Answers

Setting Time and Date problem on Venus GX


I'm having problems setting the Time and Date correctly on the Venus GX, every time I set the time and date it reverts back to a time about 3 months ago virtually instantly. actual time is 2019-11-12 20:34 (approx)

I know its supposed to get the time from the internet but the time is totally wrong.

If I reboot, the time continues to be about 3 months behind but is increasing.

i have tried setting this in SSH with the date command, and hwclock command, but it always reverts back and I don't know what the ntp settings are.

Any ideas would be great




Tonksy asked
Tonksy answered ·

2 Answers

What does blue tooth have to do with clearing an E1 error?

I have a SBP-220 in my system. I have been performing a functional checkout of my system and have come across some unusual behavior in the SBP-220. When I tried to return from Off-Load to Active with the Load Output soft switch I received an E1 error, repeatedly.

I read an old post on this site about voltage drop and the length and diameter of the GND connection on the Battery Protector. I tried some of the recommendation, but I couldn’t relocate the SBP-220 so I was stuck with the wiring the way it is.

But what did make a difference really confuses me.

Once I switched the load off via soft switch, then switch my iPhone to Airplane Mode for 30 seconds (dropping out Bluetooth) then back to blue tooth mode, re-establishing communication with the SBP-200 from the Device List, I can then switch the Load Output to Active with no error. Go figure. Does anyone out there have any idea as to why this happens? I found 30 seconds blue tooth drop out was the minimum time period for a successful return to Active, repeatedly.

How does the SBP-200 sample for line conditions and how often? Is it a one-shot check and how long does it check to determine condition. Do the Preset User Defined values or Load Disconnect Mode settings have anything to do with the E1 error when manually trying load the SBP-200 via Load Output soft switch?

Below is the main power layout layer of my mounting shelf. The batteries are just below the shelf, in a lower compartment; needed 6' of 2 AWG wire to connect them. This is a slide out shelf, the reason for the 6' cables.


Steve asked
Justin Cook - Bay Marine Supply USA commented ·

1 Answer

PV rapidly fluctuates between 1 and 130w in Bulk - Battery voltage spikes to 14.65 then drops.

Hi, I'm getting some worrying behavior from my set up today. Not something I've seen before. It's a mixed day with clouds and then full sun.

When overcast everything seems normal.

When the sun comes out the PV wattage jumps right up and the battery voltage spikes to about 14.65 volts. Then the wattage then immediately cuts right back to 1 and the battery voltage reduces to 13.3ish. The watts and voltage then jump up and rapidly max out again, and the cycle repeats.

It is doing this in both absorption and bulk mode. The absorption voltage is set to 14.4v and float is set to 13.67v.

My equipment is:

  • 100/20 MTTP
  • MTTP Control
  • 200w 24v Victron Panel
  • 100Ah 12v pure lead/carbon battery
  • BMV 700

Having done this all morning - rapidly fluctuate between 1w to 130w PV and 13.3v to 14.65v battery in both absorption and bulk modes - it's now stable in float at 35w and 13.64v.

Is this normal?

Atomix asked
Atomix answered ·

2 Answers

Victron 100/20 no history

I was showing the phases of my charging now it doesn't show anything


Devaughn Tyler asked
Justin Cook - Bay Marine Supply USA commented ·

8 Answers

what means blinking warning triangle / was bedeutet das blinkende Warndreieck?

Dear all / Liebe alle,

please find attached some Screenshots to describe my questions / anbei ein paar Screenshots um meine Fragen konkreter stellen zu können:

Multiplus II & Color Control



Battery Box shows only 8 % SOC, settings show 10 / 15 % i think (sorry, i am just an ordinäry person with very low knowledge on photovoltaics - learned by myself due to the fact that my contractual partner sold me something he could nor customize nor explain to me - now we are in a legal dispute and my Color Control shows strange things again) / Die Batterie Box zeigt nur noch 8 % Ladung an, die Einstellungen zeigen 10 oder 15 % an (sorry, ich bin absoluter Laie mit sehr rudimentärem Wissen zu Photovoltaik - in der Not angeeignet weil die Firma die mir die Anlage installiert hat sie nicht einstellen oder mir erklären kann - jetzt befinden wir uns im Rechtsstreit und mein Color Control zeigt mal wieder komische Dinge an)


My questions are / Meine Fragen:

What indicates the blinking warning triangle on the top site right hand? That kind of makes me nervous - do i have to be nervous? / Was bedeutet das oben rechts blinkende Warndreieck? Das macht mich nervös - sollte ich nervös sein?

Why is on the first screenshot "ESS #1 #2" shown? I have only seen this while the remote connection was established for remote mainrenance? / Warum wird auf dem ersten Screenshot unter dem Multiplus "ESS #1 #2" angezeigt? Das Zeichen habe ich bisher nur einmal während einer Fernwartung gesehen.

Is my Battery now going to suffer / break / ...? The minimum SOC according to the Internet is 15 %, not 8 % or 10 %. / Wird meine Batterie jetzt Schaden nehmen? Lt. Internet ist der Mindestwert der Entladung 15 %, nicht 8 % oder 10 %.


I hope someone could answer my questions and might offer some advise what to do until the legal dispute is solved and may have some experience if i should be worried about possible battery or system damage or not. Further background Information: the victron expert my contractual partner added to the system for customizing etc quitted the service since they changed settings without my konwledge which heated the solar chargers up to 56 degrees... / Ich hoffe hier kann jemand meine Fragen beantworten und hat vielleicht noch einen Rat für mich oder Erfahrung mit diesen Meldungen und weiss ob ich mir Sorgen machen muss um potentielle Schäden an der Batterie oder der Anlage. Zusätzliche Hintergrundinformationen: Die Victron Fachfirma welche mein Vertragspartner hinzuziehen musste für die Inbetriebnahme haben den Vollzugriff abgegeben nachdem Sie ohne mein Wissen Einstellungen der MPPTs geändert hatten, welche zu starker Erwärmung dieser führte mit ca 56 Grad Celsius.

Thanks a lot in advance and have a great day / Vielen lieben Dank im Voraus und einen schönen Tag

BR/Lg Sabrina

PS if your advise is that this all has to make me nervous i would be happy over the moon if you could recommend a Victron expert with additional knowledge to byd batteries around Germany - Thanks again :-) / Sollten mich die Meldungen ESS und Warndreieck objektiv betrachtet nervös machen, sprich, braucht es da einen Fachmann, wäre ich wahnsinnig dankbar über Empfehlungen von Victron Fachfirmen mit Erfahrung zu BYD-Batterien irgendwo hier in Deutschland. Nochmals vielen lieben Dank :-)

Sabrina asked
Sabrina answered ·

2 Answers

Erroneous Readings: >700A Idle consumption, only 7.1V (Multi-meter confirmed 13.8V)

I have a 12V 2 batteries in parallel system with two revolution power lithium 60Ah batteries with 1m of 2B&S cable running from the positive to a circuit breaker then load. The Victron shunt probe (Supply cable) is connected to the line side of the circuit breaker (I.e. always on and before any load). All load, charger and earth are connected to the correct side of the shunt with only both batteries connected to the other side.

All load components are working normally and voltage is as expected around 13V however my Victron BMV712 is only reading 7V and says that there is an idle draw of over 700A, This is definitely false.

I've tried factory reset and linking to my phone to update firmware, the errors persist.

Any Ideas what's going on or if I've done anything wrong? is the unit just faulty?

Warmoob asked
Guy Stewart (Victron Community Manager) commented ·

2 Answers

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