Multiplus shows Low Battery warning and won't turn on.
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- Опубліковано 11 лют 2025
- I knew, the test would be tight and I may run out of battery during the night. I had only 41% state of charge and still let the load of 2kW running over night. In theory (and what the smart shunt calculated), it should be possible. So, I gave it a shot... and lost. But not as expected....
And now, the Multiplus is in some sort of deadlock and won't start anymore after it shut down in the morning.
I'm investigating and troubleshooting with not much luck. I cannot figure out what exactly happened and why the Multiplus is locked...
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Andy pls consider making a follow up Video on this ... keen to know the final outcome ... thanks A
Hi Andy. I had that issue several times. Unfortunately I did not have the luxury of time to carry out a proper troubleshooting. Just jump off straight to turn it off and back up again, that is physically in the workshop. Fixed the issue every time, but defeats the purpose of a reliable system as you have to be there! I put it into the “bug category” for now. Cheers, Raz
PS My inverter is Multiplus II 24V/5000/120
Ι am kind of happy you had this problem because it happened to my 24/3000 phoenix smart and i tried to find a solution for 4 months with no luck. at the beginning it would restart after a few minutes or hours but in the end it was unable to restart, automatically or manually. I send it buck to offgridtech in germany, a victron reseller and guess what? "There is nothing wrong with your inverter, it works fine." They did replace it though. That was even more frustrating . So now I hope I will get some answers from the smart Australian guy on you tube. Good luck and thanks for your videos.
Hi Andy, I had the exact same problem about a month ago. The firmware used was 498. Unfortunately, to this day I don't know why the Multiplus didn't start converting again....
Thanks as always for the great video!
Hello Andy, please check the assistents that you use. For example the ESS Assistent uses his own parameters of voltages.
I'm off-grid, not running ESS Assistant. I just use the generator start stop assistance to trigger the second inverter. But even that seems buggy now...
I wake up every morning with my hot coffee ☕ looking forward to Andy's videos of the day..
Here it is..☕
@@OffGridGarageAustralia Awesome Andy.
Hi Andy
Since a firmware-update wipes ALL previous settings, I would say, you will have to reset EVERYTHING and it will continue working. If you really want to update your MP2 (Victron recommends not to), you should save all the settings before and play them back after the update. I once had a similar problem and looked it up in the same column like you, just where you expect it: "Inverter" (showing in your video at 4:45). But that was wrong. This is meant for the TOTAL shut down of the MP2.
You can use "Victron connect" and check the column "AC-Input ... something". It is called "AC-Eingangssteuerung", so I don't know what the exact wording in your system is, but it should be "AC-Input-regulation" or similar. There you will find the values which tell the MP2 when to stop inverting and when to start again.
Watching your channel from germany and really like your sense of humor!
All the best!
Yep, I know. I do this after every update. Because I use the MP just as an inverter and have only two generator start/stop assistants setup, it takes me a minute to set it all up again.
The AC-Eingangssteuer is only for AC input for the MP. I use this when my 'generator' starts (a second inverter) and I can adjust this value accordingly. This should have nothing to do with the MP shutting down far above the low voltage disconnect I set in the config.
Hi Andy
I made a test on my 3 phase Victron Mulitplus 2 System. Firmeware 500 installed.
All 3 inverters switch off by 37 Volt and start simultan a soon the DC voltage is back over 43 Volt.
Works perfekt without a Issue.
Regards from Switzerland
Samuel
Hi Andy, this seems to be business as usual.
Have had a similar experience with my MP II`s a bunch of times:
whenever a low battery event occurs, the MP II stops working, sets an vrm alarm message and turns a red light on (Low battery)
It will never awake from this, remain in that state, to make sure your complete system is in a safe condition and you recocnize the problem.
So first check the whole system state and clear the reason of the fault.
Then turn off the MP II, (wait a moment) and clear the alarm (the active alarm needs to be acknowledged on the three dots in the alarm log on the VRM portal)
After turning on the MP II again, it will just work fine as usual.
This seems to be a security procedure to save your system.
By the way: after fw update, your device ist set to the defaut settings again. You have to reconfigure it and you can not use the old configuration file from the past (before update), you have to create a new configuration file now.
(so don´t look to the values of the old file. Download the actually one and have a look to this settings)
You also might setup the generator-assistent for the Phoenixinverter again
Thanks Micha. I was under the impression, the MP will recover itself once the battery voltage rises again. Hence there is a recovery voltage to be set in the config. It clearly didn't do that even the battery and system was all fine again and in a safe spot.
I know, after a FW update it resets everything, even the assistants. Very annoying... can't really do this for a remote side, can you...
@@OffGridGarageAustralia I agree 100% Andy.
1. With your settings, it shouldn’t have shut down in the first place as the voltage didn’t get as low as you had set.
2. With your recovery settings, it should have restarted as the voltage went up again.
To me - this is a fault in the software.
@@OffGridGarageAustralia Yes, you are right. - Your valuable video may bring important input from the community to all of us.
And your power of mediainfluence may affect VICTRON to change this procedure.
Thnxalot for all your clear and analytical videos - they are really useful.
(You are a great solarboy and an impressive person, dear Andy)
And how does Victron expect this to achieved if you are 1000 km's from the home?
@@davidfrisken1617 Hi David! In the case of a serious fault or damage, you always have to maintain / repair the system personal.
It is better to shut down a system as to cause a fire for e.g.
Remote control is always more a monitoring option for a complex system then a real maintainance
This bit me the same way. I have a BMV-712 shunt and when I tried to add the louisvdw serial-battery to forward the JKBMS measurements to the GX it triggers the low battery alarm that does not go away. After three alarms I had to restart the MP2s (3-phase) with a power-out of the house 😒(the MP2 being my UPS, yet for this reason useless as an UPS).
Once I got both BMV712 and JKBMS measuring at the same time (over bluetooth or rs485), it is possible to reset the LBV-alarm by changing the "System setup" -> "Battery monitor" away from the BMV712 to the JKBMS and clear the alarm in the VRM.
The bug seems to be in the Victron "serial-starter" handling that tries to reassign the ttyUSB devices and the BMV-712 gets briefly disconnected and forces the MP2 to go in the alarm state (probably thinks the battery dropped out), even if "VE.Bus DC Voltage and Current" log does not show anything but normal voltages.
I'm now trying @Nico's suggestion to disable the MP2 "Alarm setup" to ignore the "VE.Bus error".
The device ID [289] changes often when the RPI GX is booted. I have to reboot it one or more times, to get it back to the original [289] and keep the logs going.
Interesting, thanks for sharing!
Hi Andy, I had a similar experience with a MP2 12/3000. In the VE config I had the "shut down on SOC" ticked, in the inverter section, which would shut the inverter down after a decent load.
Since the inverter does its own calculation of SOC based on usage and battery information, I decided to disable the "battery monitor" in the general section.
Didn't have any issues after those changes.
Hope this helps!
Yep, checked that and it was off. Never had this activated and always had the shutdown voltage really low (below BMS settings).
Exactly what I did and this as cured the multiplus.
@@pathfinder303 Hi PAthfinder, good to hear! just this autumn time, happened to me too.
means when it cured your problem, you are running on MP Version 50x I think?
then would try also later the day..
thanksJoerg
i m sure i changed the parameters to even lower to let it run idle consumption until morning sun hits.. 3 days later saw bms still awake but alarm showed on pc when connected.... i reset 2 times and everything ok.. i played with even more agresive parameters disabled the battery monitoring too.. i dont think it was that... no load for me on that test !!!! tomorow i m going to see if error exists
Could it be the the RsPi renumbers the USB interfaces ? Have not seen this Behaivior und Cerbo's or Color Controls.
Yes, it seems to be related to that...
Did you ever explain this fault Andy ? Am having similar issues with a brand new Quatto-II. Shuts down with "Low Battery" and stays shutdown, but only when I have the MK3 plugged in. Mmmmm
yes exactly same problem with updated firmware , the id number changing is interesting ?
Hello, Andy ~~
I have had a somewhat similar thing happen, but on a far less sophisticated system. It was my Smart Shunt that appeared twice in the Device List of the Victron Connect phone app display. It was during a period when I was actually watching the app, checking in every 10 minutes or so to watch because my Magnum MS2812 charger/inverter had been seen to try pumping 16 volts into my new LiFePo4 batteries. That got me plenty nervous.
After voltage under charge rose to 13.6, the volts stopped rising, but the amps did not drop. I watched it for over an hour, with both lines on the graph dead flat. At that point I walked too far from the Shunt, and lost Bluetooth connection. When I re-searched for the Device List, there was my shunt twice, one showing a trend line dead flat, the other revealing trends that carried volts up, and amps down.
Would LOVE to know what you found to be at fault.
Hi Andy, all,
great video and info as all of yours, many thanks!
interesting update fresh from this morning (2023-11-07). Had low batt error, too.
being offside, VRM portal only. running V506 on MPII. (V3.12 on Cerbo)
as known, MPII does not reset lowbatt automatically. Remote console and switching off/on again didn't help.
BUT: used the VRM switch for same off-on and guess what? the error is not shown anymore..
Off-On seems different from VRM portal, than from remote console.
But managed to get rid off the error remotely, finally.
BR
Joerg
That's not great, the MP should come back to life as per settings. It's the essential product in each system. Definitely a software bug. Still!
I have set mine to 38V now so it won't shut down any more unless all BMS have shut down and battery is completely empty.
I can estimate the load over night and turn off non-essential load to ensure battery does not go that low. No problem since.
Updated all my three 3000 MPII to firmware 500 three hours ago. I really hope it's not buggy , up to now I have no Problems. Please keep us informed.
Yeah, similiar wondering here also with MPII. Running bit older firmware (can't remember). But yeah, I have sometimes bigger surge of power and battery voltage goes low and alarm comes. Then what is pretty weird... like Andy show in video. When voltage goes back to up, over the "low voltage" treshold values (what has been configured into MPII) ... the alarm stays and sometimes a long time. It just uses grid loooong time, even the battery voltage is back to normal level. I kind of understand some sort of an victron logic here (under heavy spike/loads), that it cannot start to ping / pong with low voltage, turn off battery -> grid -> batt voltage comes back -> grid off -> voltage drops... and repeat this. But what I would like to know from Victron.... * what exact logic is behind clearing out low voltage warning * Why it sometimes takes ages, and sometimes never come back to normal (despite batt voltage and SOC is ok).... Great stuff Andy, hope you/we can get some answers from Victron.
This is another good reason for me to choose the Quatro series of Victron inverters. Their fans are suppose to be a little quieter too.
Yes And its a problem when I put my Multi off and do not realized, that 49.9 V is to low and MPPT in the morning and all day gives only 30 - 50 W from 7000 Wp. So it was dark too.
I had the same problem once. It was a blown fuse but stil in contact to draw a lillte current. After replacing to a new fuse it works again. The active alarm needs to be acknowledged on the three dots in the alarm log on the VRM portal.
The inverter shutting down is a low-stress event on the inverter. Just like any inverter, it is easy for it to simply stop pumping voltage without stressing components. The BMS's shutting down, however, is a high-stress event if maximum amps are running through it. In this case maximum amps were not running through the BMS, but it is something to think about. BMS's tend to blow MOSFETs when they try to shutdown while a lot of power is flowing through them (see explanation at the end of why this can happen).
For the DC paths, similarly, if the BMS would otherwise be pulling in excess of 50% during a shutdown event, it might be better to have a sacrificial low-voltage shutdown that operates before the BMS would otherwise kick-in. Saving the BMS to truly be a last resort.
In prior years not having internet during a power failure really bugged me. To the point where I now have power stations backing up my cable modem, wifi routers, and home server and switches. I use a little GoLabs in the garage for the cable modem since it only pulls 5W (direct DC connection, the GoLabs power stations have a bug where the AC shuts off after 8 hours of unattended operation). And I have two Oukitel P2001's backing up the security system, WIFI routers, home servers, and workstation. The two POE+ wifi routers burn around 20W in total. And one more for the fridge, soon.
However, every power station has its warts... I've almost given up even buying them anymore :-(. The Oukitel is no exception. Its firmware has a bug where the fan does not turn off soon-enough and that causes the AC to drop-out every once in a while. I had to hack the temperature sensor (added another resistor in parallel) to force the trigger temps to be lower to fix it. And the Oukitel... it has a great UPS mode, but the idiots also reversed the HOT and the NEUTRAL lines on the AC output and don't connect the GROUND line through. Sigh. Still, it works for the equipment it is connected to.
--
Physics explanation of why BMS's sometimes blow up their MOSFETs when they shut-down during high loads, but not during low loads. A certain amount of charge must be injected into or pulled out of the gate of a MOSFET to turn it on or off. However, the amount of charge required increases significantly while current is flowing through a turned-on MOSFET. BMS makers often do not provide enough drive current (particularly when driving many MOSFETs from a single MOSFET driver). So when the BMS tries to shutdown while a lot of current is flowing through the MOSFET, it winds up happening very slowly and it actually puts the MOSFETs into their linear region for too long a period of time which causes them to act like a transistor and directly dissipate the difference while turning off. In addition, the gate voltage trigger points for each MOSFET will be significantly different, so during a shutdown not all the MOSFETs will turn off at the same time. This combination can easily blow up one or more MOSFETs.
The solution is to ensure suffiicient gate drive for all the MOSFETs such that they shutdown as quickly as possible. But this is expensive so BMS makers often cost-cut the gate drive. And BOOM.
Hence why relying on the BMS for your first line of defense in a low-voltage shutdown situation is not a good idea just in terms of good practices.
-Matt
But you need to get your batteries to a low state of charge and have a predictable load let's say 25 amp load on the inverter and see how much your voltage sag is at the inverter because it's shut down will be based on its own internal measurement of the voltage so you'll have the losses in your cable that'll be different than what the shunt is reporting so if you have a maximum load the voltage sag will be more and it might shut down early just because there is a maximum load it would be better to shut down at a state of charge
@@Josh-b3c Yes, this makes sense, though with LiFePO4 the voltage won't sag a whole lot under the 1C load unless its already near empty. At that point you'd probably want to shutdown anyway.
The voltage drop over the cable itself with the thick cables Andy is using is probably negligible.
@@junkerzn7312 yeah that's what I meant though was the cable and depending on the length for instance mine is a pretty long cable run at full current I get quite a bit of drop across the cables but at low current there is no drop at all
@@Josh-b3c While I think it is uncommon, the inverter might have a separate voltage sense input that you can run a separate thin (essentially zero current) wire to, allowing the inverter to measure the voltage at the battery. But otherwise a thicker cable is needed if the voltage sense is interfering with the shutdown levels too much.
In a fully integrated system the inverter would be able to access the voltage data directly from the BMS prior to any significant line drops.
@Matt, great description. However if you’re relying on the Victron to shut down with low voltage, to me this reinforces the fact that the Victron should have then restarted as the voltage went up again.
How can you trust your system in your absence otherwise?
I had the same problem after installing the ESS assistant. I tried all of the suggestions mentioned above, to no avail. Realising that the problem was likely connected to installing the ESS assistant, I compared the new ESS enabled file with the previous file and noticed that in the new ESS enabled file I had checked ‘enable battery monitor’ in the general tab. I unchecked it and uploaded the modified file - problem solved, no low battery alarm on the Multi. I have a pair of pylontech 5000 batteries which have their own BMS, presumably there was some sort of conflict. Obviously not relevant to your setup Andy, but it underlines what a minefield VE config is!
Hello ! I have the same problem as you with my 2 multiplus II. They work in parralel and charge a 15kwh Seplos battery. Sometimes i have to reset the multi' a few times until it runs againd as it should. And it only happens at night when the battery drops to around 80% state of charge.
You should try to go in the Cerbo (or rasperri pi) to the "notifications" and acknowledge clicking the "V" at the bottom
Andy I have the same problem, did you find the answer?
Hi Andy
Build yourself a Widget that has VEbus voltage (voltage seen by the inverter) verses BMS voltage. I am a marine installer that just installed a Lynx 1000 NG BMS and 600 ah Victron NG Lithium. During my discharge burn in test I had exactly the same thing happen. I'm still digging, but I did find multiple instances where the VEbus voltage spiked much lower (in one instance with 13.66 BMS voltage, VEbus reported 10.51, which shutdown the inverter. Why I could not restart it is another question that I have yet to resolve.
Found a SPAT today! Emptied it ready for inspections.
Aposto nesta situação, o Andy deve verificar o que se encontra de parametros no VeConfigure, após o firmware update, quando não queremos perder os dados a actualização não deve ser feita sem perder a energia, por exemplo com um portatil, para guardar o ficheiro que vem depois do firmware update com a extensão diferente de *.rvsc, que depois deve ser efectuado o upload para o MP II..
Effectivement c'est intriguant ! merci du partage ANDY's.👍
Have had this happen to one customer of mine, just threw the exact alarm as yours did only a restart and clear of the alarm log rectify the issue has not happened since I will keep you posted if I find outcome likewise with you
Thank you for sharing this. It is probably good signal to do not upgrade firmware if everything is just works well.
Hi Andy, thanks for the Video. I am facing the same problen (low voltage and cut off) on my autaek solar car "filling Station" as well. Even when I duscinnect the Mk3 from raspi. The MP 3000 did run on Pylontec fine but now wirh 16s JK BMS the problem starts 😢 thanks a lot for a possible part 2 😂
Perhaps your low voltage shutoff of 37 volts is out of range for the inverter so it gets disregarded and a system default value is used to trigger shutdown. Granted it should notify you if that is really what happened, but it would make sense why your setting was diregarded.
Andy, do what I do and run your wifi router off a DC power source - a cheap 5A 48v to 12v buck converter will mean you have wifi right up until the Battery shuts down.
Hi Andy, great video but a question comes to my mind. What happens to the MP when the BMS switches off under full load? Can this destroy the inverter?
I've had the same experience with the ID. Also, I've had quirky low battery alarms when I remove the battery's can bus. Although the settings of the multi are ok, it behaves very strangely without a CAN connection.
It may be unrelated but I have created some of those generic usb to ve-direct cables for using with a raspberry pi and I found them quite flaky. I swapped for genuine Victron cables and had no issues.
Hi Andy - Do you have an ESS (Energy Storage System) Assistant configured ? I was having unexplained VE BUS Low Voltage errors and random disconnects from my SEPLOS Battery, and found that it was related to the Victron ESS Dynamic Cut Off Config defaults. After tuning these values, I'm no longer getting disconnects (nor the VE BUS errors). Note that when Dynamic Cut-Off is used (which is a default), the "DC Input Low Shut-Down" Related parameters in VEConfigure are ignored.
No, I haven't as I'm off-grid. I have the PV-Inverter assistant installed, so can connect AC-coupled solar to my off-grid system.
I've not seen any random disconnects with Seplos. Only the QSO BMS does it randomly.
Thanks Andy 🤔 🎄
Andy. Sometimes the Firmware/software gets hung up and the only thing you can do is completely power down the system,remove the DC, wait for it to totally discharge and restart. Remember the precharge resistor. Now go back and look at all your settings to make sure they are yours and not the defaults. Yes, you are correct, you need to do a repeat of the scenario to make sure it doesn’t repeat. It should restart automatically and it should never change it’s address on its own. I’ve found with a lot of devices that after updating software, it’s always a good idea to completely shut down (zero power) and reboot. I sure hope that’s all it was.
I can only agree with that I also had problems after the update to 5.00 and have the entire system de-energized. after that it worked again (phu scare minute) greetings from dark cold austria
Generally the Venus OS has been extremely reliable but during the previous round of updates, the SCC was reported as receiving a batt temp of -1°C from the BMV which does not have any temp monitoring. After rebooting the system the SCC picked up the batt temp (and voltage) from the smart battery monitor as it normally does.
Hi, I have a similar issue. Im on a boat. Multiplus II suddenly showed a low voltage alarm. Solar, Shore power and generator work fine but when I isolate all systems the Low voltage alarm activates and no power. I've checked the voltage and all seems to be fine as are the batteries. Any ideas welcome...
I had something similar with an error 'Low battery Voltage' and had to turn off and on the multiplus. That happened when my raspberry went down during a restart of my system. The multiplus couldn't get the battery voltage from can bus on the raspberry and wen in 'Low battery" mode and off. My solution was to disable "VE.Bus error" in Device List>Multiplus>Alarm Setup. That way, if for any reason the multiplus can't communicate with the can bus because of a VE.Bus error, it does not go anymore in 'Low battery Voltage' error. But you didn't seem to have a VE.Bus error. I'm not sure it help, but i'm going to keep disabled the VE.bus error, because like you, I want the multiplus to be always on, even if it loose the battery or the raspberry (i'm grid tied with ESS). I had as well a different id for the multiplus and it went back to the same id. I never understood why!
Do you have DVCC still active ? I have no experience with this feature, but this may have overridden the multiplus features, and suddenly stopped communicating right?
Yes, I have this still active. Hmmm, that would be a huge bug though...
@@OffGridGarageAustralia I have that always on, never happen something like that. But as i wrote, I still run 296
Hello Andy great videos I enjoy your testing. In this video you forgot to look at BMS info. Veconfigere was a wrong road to take. You have DVCC on, thus multi ignores its charge and discharge and low battery cut off settings. It will only listen to the DVCC messages. Likely DCL was 0Amps till the BMS updates his info. Not Victron software was to blame as many comments do. BMS communication was the problem here
@@ancovanbergeijk4766 Thanks for the tip. My Multiplus works as an inverter only, no AC or charging. I also don't have a smart BMS connected, just the Smart Shunt. So, DCL should not be activated or valid in this case.
@@OffGridGarageAustralia Ah yes DVCC on and no BMS is very possible option to run on. Seeing all your BMS testing I assumed there had to be a bms in this system too. And almost always when I see a low voltage alarm on Inverters, Multi's or Quattro's it is because of DCL 0 amps as we work 95% with BMS connected batteries. Next tip take VE-Bus rj45 cable off and restart the inverter. It now goes back to Ve-configure settings. If the inverter works fine this way than search for the problem on the raspberry pi. As soon as you connect the RJ45 VE-bus and DVCC is on and your Raspberry pi might still have wrong BMS info from a recently connected smart battery than that may switch of the inverter right away. That has happened to me as I was testing and writing my own BMS python scripts....
Andy, I went through all the comments, and I'm still at a lost to resolve the same issue as yours. Is it a firmware issue? Can you do a follow up video? Bob H.
Hi Andi,
I also have a Victron MultiPlus-II 48/5000/70-50 on an Island system and have the same Behavior. When the low voltage error comes in, Multiplus shutsdown and even afer the battery is back with 50% ans higher, the Multiplus stays at error. The only way to get back on power ist to turn off the Multiplus and turn it on again.
Really looks like there is a firmware problem. Even on v502 it still is faulty.
Thanks to you i bought my first Victron. bad luck for me it seems to be faulty piece. The item is a Victron 100/30 Smartsolar. Yesterday I connected the battery to it, correct polarization. The terminal sparked, the lights flashed and went out. It only turns on when I connect voltage to the PV output. As it's my first Victron, I thought I might have done something wrong, but I checked and we really should always connect the battery first. Any golden tips?
I have a new rack battery and see where others are complaining about the MP II doing a low battery disconnect and the battery people have said to have the people check with Victron. ... I can't ever get a reply from Victron and I have been wanting to go into being a Victron installer ... anyway. I have yet to connect up the Muliplus II though 12V ... but I did have some issues and think I found out ... my readings and current settings in the smart shunt needed recalibration with known full charge. I did have an error of the rack not turning on with things connected but to fix it I connected the wall wart Victron charger and the rack would stay lit. ... I appreciate the approach here to figure the solution/problems and not just go off on a tirade rabbit trail.
Write in the Victron Community forum. Victron is very active in there too.
Did you fix it? I have this same problem
Suggest you read configuration and check settings then re-write. There have been some changes between firmware updates recently and you have to do this if it is not done automatically to migrate your settings to the new parameters. If you don’t settings are set to default and can throw some things out
The settings have all been reset after the FW update. I always have to do that and it's also recommended by Victron.
Similar experience with my Phoenix Inverters. I had a miscalculation of the Smart Shunt and the BMS disconnected the Battery at night. My Phoenix inverter get in error state and wont turn on until i disconnect it from the input Power for ~3min.
Hello victron expert I am switching to victron but I'm not noticing a port on 150/35 charge controllers. I have lead acid. So how do I monitor batt temps
bluetooth if it's smartSolar version, and via VE. port + device that make that signat to bleutooth or wifi (victron have it) if it's BlueSolar.
Hello Andy, I also had a strange experience with the Multiplus that works as an ESS system. After the firmware update to V500, the batteries were no longer charged. The solar chargers could no longer recharge the batteries either. Even though I had the same configuration as before. I have reset the Multiplus to factory settings and
after several attempts to load the remote configuration into the Multiplus (via VRM portal) I still had no success.
When I went on site with the laptop and recreated the ESS configuration and loaded it, the Multiplus worked again as before.
I don't know whether it is due to the remote upload of the configuration file or some other cause, but I got it working by loading the configuration on site.
Maybe someone has had my experience too, I'd like to know.
I wish you and all viewers on this great channel a nice and pleasant end of the year and success in everything you do.
Greatings
Jean-Pierre
im having multiple problems after 500 update have spent 8 hrs with 3 people trying to sort faut after fault til our heads bleed from constantly bashing into the victron 2xmultiplus 2 5000 and 8 pylontech us 3000c batteries serbo gx brickwall problems
our problem is we have not got the fronius gen 24 and mppt 100 13.5 KW PV ,2 x multi II 5000 CERBO GX LYNZ DISTIB AND 8 X US 3000 C BATTERIES ACTUALLY PLAYING NICELY TOGETHER , even once yet
Crazy event. Worth it to run test again to see if it repeats. Did you ever put a voltmeter on the battery cables coming into M+? Keep us posted. Thanks for sharing.
Hi Andy. Just watched this and have a few comments. I wonder if the pi experienced an issue during this fault. The logs on the pi now might not go back that far but they might indicate a disconnect of the multiplus. I suspect it crashed disconnected from the victron software and that then triggered the first new ID. You created the second when you intervened and did a hard power cycle.
never change a running system!
victron wrote „It is not required to keep your Victron equipment updated to the latest firmware version. Stable systems should be left with their current firmware“
Lolz
It had this issue long before the FW update
They also say that mRNA vaccination would protect us against infection and be free of side effects. Or wearing a mask would protect us.
@@mbr8981 was hat das mit dem THEMA (Multiplus and los battery) zu tun ? ohne Worte !!!
@@helmo5663 das mich eure Obrigkeitshörigkeit ankotzt...
Hi Andy it happened to me with a 500va small multi and a new 3000va MPII, however, I noticed that is because I shut down the battery manually and also I have AC input while the multis were in through mode, the system would freeze and would not restart untill I flashed software and configuration. On and off did not work for me.
With the 500VA I isolated the battery manually cause I though I could have my loads by-passed while I was upgrading the batteries.
With the multi 3000VA I was testing if it was possible to do the same and obiously I couldnt 😂.
However, I always leave the multi to stop the load with low soc and i do by-pass from the grid without issues, and in the morning it charges back up when sun shines (i am grid connected)
I think the problem is only if DC shuts itself or you do it instead of the Multiplus.
Regards :)
Interesting. I am using a non Victron inverter which does also have this issue, I have to power cycle the inverter. I wonder if there is a setting somewhere for both of us to recover from low voltage alarms?
From my experience with dangerous machines: Some safety features are designed to enforce human interaction before powering a machine back up. Do you have to discard the alarm manually?
They clear automatically with all other Victron systems once the fault is no longer there...
is it possibleto run the systems without updates or you cant avoid it ? i might go no internet connection after instal.. only occasionally if need for serious situations
@OffGridGarageAustralia Id Love a follow up to this one... I have jst had this happen to my Multiplus II 48/5000 but the difference is it hasn't had a FW update! Im at a loss...
I had something like that but because my grid tension went above 250V ... I think I have in the settings to not recover in case of fault... but I also think that is for shortcircuit... I have to see because it happens twice, above 250 shutdown ( what is ok) but don´t recover... ( my multiplus is in the 552 version of firmware)
I just had this problem but it was reoccurring on a new system. JK BMS 100 / 20 multiplus II and venus on a pi. Very similar system as yours but much lower capacity. I noticed when i disabled dcvv (disconnecting the bms) the alarm went away. I reset the bms parameters and increased the RCV voltage .010 mv per cell and the issues is gone. Very annoying not knowing what fixed or caused it. Even stranger was my batteries were at 95%! Was there a follow up vid?
Idk if what I'm about to describe could explain what was happening with your inverter not powering itself back on without you having to manually intervene, but...
I recently ran into a seemingly similar issue (I think...). My batteries were reading at 27.6v (24v nominal system) but the multiplus kept showing low battery warning. Apparently if the inverter fails to auto-start 3 times in a row after low voltage is detected on batteries, it has a built-in lockout feature that helps prevent it from doing an infinite power on/off loop that could potentially damage equipment downstream of the inverter. To get it to come back on, I had to manually turn the switch to the off position and then back on a couple of times.
To address my particular issue, I'm trying some different low voltage alarm/warning disconnect settings via VE.Configure.
I have the same issue 😢
Hi Andy,
When I installed v500 I had to reconfigure everything in VEconfigure, as per usual when I update firmware. Also note I usually can't use a previously saved VEconfig file, I need to make a new one. DId you check the DC shutdown and alarm setting with VEconfig in the MPII?
i have the same prob,, i bought mine 3 days ago, i still cant get it up and running,,,, gerrr,, it says it can run on 38 to 66 volts,, my bats are at 49.00 volts,,but the light just keeps blinking,, i get nothing,, i dont want to have to buy a cable if its not gonna work for me
In the video you said 2 days ago you updated the firmware every time I update my firmware it resets all of the settings on the inverter and I have to go in and change them all again back to what I want if you're viewing the file you're not doing what's actually on the inverter you're just viewing the file that you had saved of that when you update it resets them back because it changes the location in memory
So open the firmware settings from the inverter and make sure that those settings are what you intend them to be I think what happened is that it reset it to factory settings and you just happened to go below into the low voltage and pass the shutdown voltage but you never passed the factory set turn on voltage and you're still in the low voltage alarm from the factory settings
indeed , he is not connected to the inverter , just reading the file .
flashing the firmware , is also a factory reset !
Andy , reload your settings back into the inverter and all will be ok
Also while i am on here andy I wanted to tell you to check your cerbo GX many of them were assembled wrong at the factory victron knows about this there is a document sheet telling you how to take it apart to reposition the antennas internally because if you use the HDMI display that victron sells for them the Wi-Fi antennas are routed incorrectly and go directly by one of the data lines for HDMI and that interferes with certain Wi-Fi channels you can simply reposition the antennas internally and fix this they also allow you to send it to them to be repaired by them for no charge you don't need to do this at all if you're only going to use ethernet connection but if you intend to use Wi-Fi it's a good idea to check it I don't know if there's a way to look up the serial number to see if your model is affected mine was it worked perfectly for a year and a half and then all the sudden stopped working completely
Yes, I know, FW update resets everything including the assistants. Annoying.
@@OffGridGarageAustralia It save it and reload all settings, if not it would be not remote update able. I guess u did it in the web page
Hi andy, the exact same thing happened to me 2 times today when I was changing settings with the mk3 to usb interface, took it off after the changes and it didnot happen again. Let you know if it happens again, did you find something else in the meantime?
It happened only once to me. Some folks in the Victron forum have advised to change some settings in regards to the low voltage shutdown which I did now. A few weeks back, I managed to discharged the battery to 1% before the BMSes shut down but the inverter was still running at this point. But there were also 2 FW updates for the MP in between, so don't know if it was the settings or the new FW.
@@OffGridGarageAustralia Oké, it has not stopped the last two days now, you are talking about a firmware update? Mine has version 498 in it, I’ll usually don’t do firmware updates on the multi’s when everything is running fine, but in this case, it could solve the problem. Cheers
@@wilvandendoel6782 Yes, FW for the Multi. I do them all the time as they fix sh!t like this. 502 is the latest, I believe.
Do not have Victron myself, but it may be that Low Voltage Disconnect is outside the normal range and it is therefore the limit in the setup that is being reported as the problem.
The logic is not able to think in the equipment, but there are limit values that batteries should be within, same with BMS and inverters. If one sets up a value outside the inverter range - it may be the value itself that is the alarm cause.
Multiplus 2 range is Ingangsspanning: 38 - 66V
Inverters normally have a setting not to reset after a low voltage until alarm is reset or powered off and on to prevent damage of power constantly turning on/off and damaging connected equipment.
When all bms turn off discharging and the solar is supplying voltage direct to inverter the voltage will drop, if not enough sun to match the load. If there was no sun and bms shutdown and restarted the inverter would reconnect the load
I had a similar situation recently. I'm using an ess mains connected set-up and my multiple started showing a low voltage warning. It stopped inverting about 1 hour before a planned charge but it did start inverting again after that. The thing is I was never any where near a low voltage cut out point . The battery was at about 45% .
The other thing on my system is that the smart shunt always shows the battery voltage about 5-6 volts lower than it actually is !
Just now my battery voltage is showing as 46.26 on the smartshunt, 52.50 volts on the multiplus 2 and 52.50 on a multimeter at the battery terminals. The batteries at 55.5 % capacity !!
that's a great video... you have a solar dream garage, it has a lot of love in that installation and components used
My multiple plus is doing the same thing. Tried shutting it down and restarting it. But the low battery light appears back. I was working on a camper and using a chop saw plugged into it. And it caused it to have the low battery alarm any help?
Hard to help if you haven't measured the voltage of battery and Multiplus at the time. Also the settings could be wrong...
I had same issue this week. I have near 100% charge and the inverter would shut down low voltage alarm. All connections are solid, i do not have anything connected to inerter to monitor at present as this was first test out of the box. It would run all ok on low loading but as soom as I put a heat gun high load on it would shut down. Battery voltage all show OK so not sure what is going on yet. not great for first time with this inverter
Have been experiencing the same issue with a multiplus I have at a remote property. Use the system to power the internet and some cameras. I haven't had time yet to did into it as far as you have, but it is annoying to have to drive there and reset it after too many days of no sun. Was thinking the firmware needed an update, but you said you just did that. Hope you get to the bottom of it.
Yeah, that should not happen at all. It should recover once the battery is OK again. And the voltage wasn't even that low...
@@OffGridGarageAustralia yes, and it will be very easy to add, like grid switches, a limit of X recoveries because of low voltage. After that X tries in Y minutes/hours, inverter will need a manual recovery, otherwise , inverter must try to recover if DC voltage rise again the threshold.
@@diydsolar Yep and it should be set as so many same alarms within a time limit and then the count reset if the error is not seen for a longer period.
Not 100% sure but the problem of the changing ID is most likely related to the RasPi. It’s an known behavior that the Pi changes the USB ID for an plugin adapter so the the overlay system things that it’s a new device. Don’t know what the exact reason is for that but could be that it is caused by a not 100% perfect power supply ( not possible to deliver enough current under high load conditions etc) Maybe worth to have a look there.
Yeah, could be the MK3 adapter to USB, or better the Ve.Bus to USB adapter which causes that. I will see once the Cerbo is in place and the MP is directly connected with Ve.Bus
I looked it up again on Google and you are right. It’s not a problem of the PI but of a lot of the USB to serial adapters. Manufacturers of those adapters using cheap clones of usb to serial chips. Normally such ICs should have a prober manufacturer name and a unique serial number, but the clones often don’t have a unique serial number. Most of the times the serial number is set to all zero. If you have more then one of such adapters plugged in on the PI the PI gets confused cause it finds devices with the same serial numbers. This causes the behavior that suddenly an device is detected as other or new device and gets a new ID.
Jens Ritter thanks for the comment. And
Andy would like to give you one or more beers if a solution is found. 🥹
it has now robbed me of almost five days to work around the problem, unfortunately with sluggish success. Yes I have three same cp2104 usb to uart converter idvendor "s**t" + idProduct "f**k" . but the serial numbers are not the same. After realizing this, I started via ~ # udevadm info -a -n /dev/ttyUSB1 | grep '{serial}' | head -n1 to find out the usb0 usb1 … serial number then in the directory. sudo nano /etc/udev/rules.d/10-usb-serial.rules set up rules with the serial number.
SUBSYSTEM=="tty", ATTRS{idVendor}=="s**t", ATTRS{idProduct}=="f**k", ATTRS{serial}=="012345678", SYMLINK+="tty*".
Once you've finished, use Ctrl + x to exit. And save the changes by entering “Y”.
Enter the following command in the Terminal to let the rules from the saved file take effect:
sudo udevadm trigger
Check the new USB port names
You can check the new names you just created by entering the following command in the Terminal :
ls -l /dev/ttyUSB*
reboot
same problems or more Felix
From 12.15 to 13.30 on your screen you have the warning, al, you had to do, is to acknowledge it by clicking on the tick on bottom bar, then alarm disappears if values are within parameters. Or, on the 3dots in the VRM, once you acknowledge the lv alarm, it resets, and MP resumes.
Yes this is what I encountered too.
This! you have to clear/acknowledge the alarm. to get things back up and running.
I don't have to acknowledge any other warnings or alarms. They all clear once the conditions are not met anymore.
So, you reckon, confirming the alarm would have started the MP again?
@@OffGridGarageAustralia yes.
I just ordered my two MP-II 48v inverters, so, you can imagine I’m wondering if there is a way to configure this to have a more automated recovery.
Whilst I totally agree that the Multiplus should not cut out until the voltage you set, having a setting below the safe minimum battery voltage means that you are totally reliant on the BMS to protect the battery. Having two different settings above the minimum voltage gives you redundancy. On recovery having to reset the Multiplus regardless of voltage stare cannot be right otherwise what is the point of being able to set a reset voltage. I will be very interested to see what you find out on that.
Great video's.
What should I buy victron easy solar II 24v 3000w £1900. Or the Epever up-3000 for £600.
This Victron stuff is expensive. Dean 🇬🇧 🙏 ❤️
Go Victron definitely. You get all the software updates, support and the VRM with full remote access. Not sure how long the Epever will last. It gets only two years warranty.
I feel sad for you Andy, it's not a great situation, but you are always really good at handling this and other "learning curves". You have so much experience that this stubbornness from the system can only really be seen as extreme to the point of not being reasonable or helpful. I'm a newbie, bought a Victron 75 10 having seen how things normally go for you and many others. Was very happy until finding out that it would never charge my battery. I read up, and got the advice from a Victron video than my panel voltage was not good enough (19v and some decimal change) They advised 2 panels in series. I bought the identical panel for a second time and added it to the first, in series. It still won't charge. I'm only giving this much detail to show why I think that sometimes it's just possible that software can be so strict, and maybe correctly so in theory, but it also renders the entire system pointless because it no longer does what it is intended to do. Just to be clear; mine has NEVER allowed me to charge a battery so far. I shall watch your progress in this issue with great interest. Good luck, we all need some at times. 🤞
Polarity issue?
@@WinningOnline Nope, and my multi meter agrees. I know it must be me, because it's never anyone else messing up, but I really can not find out what I have done to cause a problem. For what it's worth, when the meter sees series voltage in the 36-38v ranges, the Victron reads it as maybe 12v or something fairly adjacent. I can't see how it can be seen as right. . Thanks for the thought of course.
@@AncientHermit Have you checked the fuse on that 75/10
@@habana7638 Yes, and thanks for asking. Just so I can learn; would it power up if the fuse was blown? I'm not sure what to expect because it has never done what it was bought for, so apart from playing with the blue tooth, I've had no chance to gain a positive experience and learn from that aspect of it's performance. I got to say I don't feel I made a good choice with this one. A costly error, and a rather regretted purchase at present. Oh well.
@@AncientHermit Well if it never worked bring it back, you have a 6-year warranty, no other brand gives this warranty.
Yes, hello. I actually had such an error today, low voltage battery, this morning, on a fresh, few days old, install as a newby. Together with an JKbms. It collided with changing some settings on the Victron, and playing around in general, last night. But it turned out I just forgot to turn on the Charge and Discharge, in the Control tab, of the JKbms app.
I had reviewed and also resetted my battery settings on the JKbms itself. And had not peeked at the Control tab afterwards I guess.
hi i had the same issue right now - can you post the link of the posted problem in the victron community? is there a solution to that? thx a lot markus
Isn't there a setting you need to activate to power on after alarm? Auto restart something like that in config software
If you are going to use it for your house I would use one of your old inverters as a backup that cuts in if the main multi plus fails
does this beep coming from the multiplus? I have the same model no sound. I wish it had one when In low charge.
also does anyone know if I can program the charge function to charge from main only spefic hours and the other times just to pass the main as pass through?
What beep? The Xijia inverter beeps when the A\C kicks in.
@@EpicHardware Good question but I’m pretty sure the answer is no.
Of course, I’d be very happy to proven wrong.
Do you have any assistants running in the VE configure ?
Yes, the gen start/stop assistant.
@@OffGridGarageAustralia some of these settings override some other settings in ve configure dashboard ( would be nice if these were highlighted )
@@OffGridGarageAustralia Yes I was wondering about the "generator" also having no power and the Multi relying on it as a backup could have thrown a spanner.
Andy, did you reupload the VE.Configure settings after the firmware update? I have seen strange things after updating the firmware and not updating the settings.
I have the same issue when my MK3 is connected to my laptop using the config tool and having it "idle" for to long. So usually I connect the MK3, make the changes and immediately disconnect it again. So my first guess would be an issue in the MK3 firmware. Had this problem also with older firmware on the Multiplus. So I don't think it's related to the new v500.
i wonder if this problem don't have something to do with the second inverter. maybe the setting in it are not allowing system to reset? i know it should but---. try disconnecting it and updating it as stand alone. make sure your settings are done manually and then reconnect? it could be why you where not able to see a problem.
That is why you buy Victron, 'cause it should just work. Will be interesting to see if it a arcane config that you have got "wrong".
Hi Andy
I can say from experience that the MP II shuts down when the battery is on low voltage, after some time it recovers back, but after the third time it has shut down it will not turn on automatically, witch means that you must do it manually. Same thing it happens when you short circuit it 3 times in a row (or overload more that it can handle)
I have no idea why it keeps showing low alarm after manual restart!
Can't wait to see more of this issue!
I had the same problem with a 12v/375w inverter had done the same, after 3 alarms of battery low had shut down and did not restart again. Only after manual disconect/reconect. The mppt charger It charged the battery but the inverter was off.
Haven't looked at my multyplus for months. It's been off. But someone moved my 48v pack of Leaf gen 1 batteries into an uncovered area and they are bloated and stuffed. I'll lock the remainder into a metal cabinet.
I had the same problem with the Multiplus changing it's ID. The solution is to delete both devices in the Victron portal and then restart the Raspi. Then mine gets its old ID again. I would love to find a solution for that. But that never happened in combination with low voltage alarm
Hi Andy. I believe it is a software bug in the upgrade. Victron software developers will find the bug and fix it. To see if this is the case, ask Victron to run the previous software upgrade and see if it shows the Low Battery. Good luck.
i think, the battery levels shown on ve system config are not right. I have a three phase setup and I have similiar issue on one of the three inverters. With same settings, one of them shows low bat and the others dont. Might be a bug.
I’m currently trying to chose between buying 2 multiplus inverters or two Quattros. Why did you go with multiplus? Do you know anything about the Quattro
I would buy the old multiplus or old Quattro these new machine I don't like we have stopped buying them . The old technology machines are bulletproof
Great Vid. Andy... as usual! I haven't tested that behavior on my system yet. I see everyone trying to figure out what could be the problem, yet the ones (Victron Energy) who can really shed some light on the issue are absent. Can any of the Victron dealers contact Victron support and ask them to explain?
Andy mentioned...at the end of the video...that Victron DOES monitor the Community Forum...and may discover Andy's "sitsheation".
My mom said dad told her it's probably best to verify wiring and connections now. She said he thinks this is best practice because during the low voltage situation occurring simultaneously with the heavy load ( several kilowatts - pool pump) the cabling and connections can have a rapid expansion and contraction event due thermal property extremes and the ensuing low voltage shutdown on the conductors early in the a.m. morning immediately after a long heating period of the said conductors having experienced a large load during the low voltage condition of the DC power supply circuit. I suppose I'd listen to him and start at the inverter connections.
I'm not concerned with the VE firmware erroneous ID problem because it makes sense that during repeated hard fault restart conditions it creates this type of marker trail ( ID change).
Andy most inverters will most likely jam & stay in place with that alarm until u restart them it's like they are locked at a stand still to save it probably from damage
What is the low voltage recover for you can set in the config. Would make no sense to use it if the inverter stays off anyway.
@@OffGridGarageAustralia the low voltage recover is in my manual somewhere mines did that and it came back on by itself over and over until I shut it completely off it was dark anyway so the low voltage recover does work on mines at least but I forgot what number it was but Andy my inverter charger also runs directly off the solar panels by they self without batteries..
Hello what do you think of the Growatt hybrid inverters are they any good ???
I would prefer Growatt instead of victron, I don't have these issues with my current system (not Growatt but in the future I will), and to be honest I would not expect to see these simple problems with such a expensive system, also Growatt is so much cheaper.
@@johanmaas9011 Thanks I think I go for the Sungrow - 3PH Hybrid Wechselrichter 10.0KW (SH10RT) 3 Phase, 15kW anny good ???
@@Fritsvrolijk Should be fine, but check the internet with ppl they already bought, but I will some same in the future, also check if they can work with a system you might have in the future. I'am having al different brands and have 1 system (domoticz)
@@johanmaas9011 Oke are you from Holland????
@@Fritsvrolijk Hehe yes that's why I hate victron that much, no just a joke, its just too expensive for normal ppl.
Yip have the same problem. BMS shows battery at 80 % and multiplys just shuts down on low battery
What does Victron say?