Kilowatt

Why would your main breaker not trip if you were drawing such larger currents? If I remember correctly my house breaker is 60A.

@hoohloc I was just going to accept the loss and walk away. So thank you for your advise to contact them directly, it has saved me a lot of money now.

After reaching out to Phylontech in China, it looks like my warranty will be honoured. Thank you to all for the feedback and insight into this issue. Below is the email reply from China. Hi Quintus, After rechecking your case, I agree that overcharging is not the main cause of battery damage. After inspection, although the battery has been impacted by large currents, the current alone should not cause damage to the cells. Sorry for the wrong judgment I gave before, I will contact Segensolar to prepare a new battery for you. Please note that when using a Victron inverter, it is best to set the charging voltage to 52.5V. Best regards, Chris

@hoohloc I have sent off an email this morning motivating for a warranty replacement directly to Phylontech. I will provide feedback once I have received a reply.

My initial setup comprised of 2 x phylontech 2000 batteries and 1 victron inverter 3000va. It is true that the batteries have worked hard, but I have never only used just this one battery on its own. I suppose I have always thought I would not get 10 years out of these batteries, but I did not expect them to fail outright. I thought the capacity would just reduce quicker than expected time frame. Expensive lesson, but I agree i am not going to win this fight.

The batteries are wired according to the victron manual for phylontech. I unfortunately don't have the data logs for the remaining batteries. But thank you for pointing the high discharge currents out to me. My initial setup was just the 2 phylontech us2000 batteries and 1 Victron 3000va inverter, the 3rd battery and second inverter were installed in the beginning of 2021. I have never just had this one battery running on its own so I think this is really strange. This setup runs my house and we are not an energy hungry house hold we use on average about 450 -500kw a month. But, I have just looked at the current draw for the past 6 months and I can see that there are many instances where the current draw is high, 116amps being the highest. So this could be the problem, I will look for the setting to limit this.

Yes have always had communications setup between batteries and the inverter, as per the Victron recommendations.

Hi All, I am running 2x Victron multiplus II 3000kva inverters in parallel coupled, to 1 Phylontech US3000 and 2 Phylontech US2000 batteries, this was commissioned in June/July 2019. I unfortunately have lost a Phylontech battery (US2000) due to over charge and subsequently swollen/blown battery pack. Over the last few months the frequency of the high voltage alarms and intermittent tripping of the whole system started to become more frequent. So after lots of observations I had come to the conclusion that there was a cell in balance in the one battery as the difference between the lowest cell voltage and the highest cell voltage was in my unprofessional opinion getting too big. (3.4v - 3.6v even as high as 3.7v) It appears to me that the bms only looks at the voltage of the lowest cell in the battery and keeps charging to try up that voltage and get the battery charged, and therefore causing the other cells to over charge. So after returning the battery to Segan Solar, they downloaded the battery logs and replied that it had been over charged to above 54v and therefore the warranty is void. I am obviously disappointed with the outcome as the Victron setup is set to 53.2v and is pretty much set and forget. The weird thing to me is that the very first entry on the battery log shows over charge of just above 54v and over the 4 years there were about 5 or 6 days that this occurs. Surely if the voltage is set too high then this should be consistent through out all the log entry's? The other weird thing is that before I returned the battery to Segan solar they requested a video of what the system was doing. And what's weird to me is that on this particular day that I sent video proof of what the system was doing there is no overload recorded on the battery log for that day, yet the system sent through multiple overload alarms and eventually tripped completely. If seems to that the bms and the Victron software are not aligned in the way they record the battery voltage? I can only seem to go back 6 months on the VRM data logs and these are all below the 54v mark. Is there any way of getting all the logs from the date of commission? So is this a Phylontech error or a Victron software error? Or maybe it's something I did. I would appreciate any help or recommendations from those of you who are more knowledgeable than me. @P1000 maybe? Or any Victron experts? Event Data (1).xlsx

I also have a Victron with phylontech setup. I have had the system for 4 years now. I also get the high voltage alarm fairly often, I just ignore it now, hopefully it will continue to work for the next 4 years.

I know its an old post, but the company I work for has just awarded Art solar a contract for 1700 x 450w panels. Hopefully Artsolar will continue to find ways to stay operational.

Thanks for sharing smurfdbn, I managed to get the first Multiplus installed fairly easy, but have a feeling this is not as straight forward as I thought. If I can't figure it out then i will have to get an installer to fix my mess🤣 I was hoping i would find a youtube tutorial, but have not yet seen anything worthwhile yet. Anyway i will be happy to share once i have it installed.

Do you guys think that installing the second inverter in parallel is fairly straight forward as in plug and play, or is it a bit more complicated than that?

Thanks Tariq, I found a small label on the inside that had this number on it 2629456.VFD I presume this is the model number. Thanks for the advise on the cable length.

Hi Guys, I want to order a second Multiplus II inverter, so that I can connect it in parallel to my first one. I have read before that the 2 inverters need to be the same or compatible in order to do this. My current inverter is a Multiplus II 48/3000/35A - AC transfer capacity 32A, if I order the second inverter that has the same description will it be compatible to connect in parallel? Or is there a specific ID on the inverter that I need to match the 2 inverters?

So i thought i would give some feed back on this matter, i should have done it a while back already. I have made no changes to my system since Plonkster did the Patch. I still get the odd over current alarm, but not often, probably happens once every month or second month now. I don't worry about it anymore. I am happy, i like my Victron setup and it continues to work well.

Another question, I normally have scheduled charge set for 5pm - 7pm while we cook, normally the batteries are at fully charged by this time of day so they stay at the maximum 95% i can select. This works well as i don't use electricity to charge the batteries and obviously they are not subjected to heavy battery usage while we cook. But what i noticed the other day when i selected keep batteries charged is that the battery went to 100% followed by absorption for the duration of the period i chose. Correct me if i am wrong but i don't think they can go into absorption when scheduled charging is selected, at least i have not noticed that. I was thinking that perhaps some of my issues i have experienced as mention above, could possibly be from the batteries not being allowed to go into absorption. Possibly not allowing the cells to balance often enough? And lastly how often should the batteries go into absorption if i cycle the daily from 100% - 25%?

I definitely think there will be an advantage for me to add extra watts to my system. Maybe bring the total PV to about 3800w. (Probably have 3000w or just over of actual power as the panels are not 100% efficient)I will have excess power during peak, but it will also mean I should have sufficient power to power my loads in the early morning from sunrise to around 10ish and again in the later afternoons as well. Will also help boost battery charging. My extra PV will have to be on its own MPPT on east side of my house to full utilize the morning sun. The other panels have full sun from 9:30 - sunset.

Ok thanks, that makes sense.

Ok, so my inverter is working hard in this scenario and the fan is running, so it’s just not 100% efficient. No problem I can live with that. If I add extra PV panels, let’s say another 1000w after losses etc. how would that change the example above? Would I be right to presume, I am now generating 3500w, 3000w is going to running the load including losses and inefficiency’s, would the 500w balance go into charging the battery? The reason, I’m asking or wanting to understand is because I want to add extra PV panels, so that I can have at least 3000w at peak to handle the bigger loads and also supplement early morning PV generation. But if the extra PV power is not going to be usable then obviously I don’t want to waste my money doing that.

Hi Guys, Hi Guys, Please can someone explain to me the reason why i am drawing so much current from the grid when my PV being generated is close to my requirement in the picture below? Is this because the inverter can only supply 2400w continuously? (Multiplus ii 48/3000)

Thank you plonkster, Unfortunately today is raining and overcast, not sure if we will get to full charge or not. I do cycle my batteries, and also run them them on the optimized without battery life setting. There are also times when the battery has a large discharge current then immediately followed by a large charge current, so i am not sure if this confuses it or not. I won't make any changes to the firmware, so we can let it run as set and hopefully no more alarms. I will give you feedback, hopefully it will just be to confirm all is in order. thanks for all the help👍

I just want to say a big thank you too all those who are so willing to pass on advise and help, but in this case especially to Jaco De Jong. I am blown away at the commitment and time he spent last night trying to resolve a problem for me ( An absolute Stranger). Thank you very much.

Are your parameters the same as this? Parameter Setting Battery type Lithium Charge curve Fixed Absorption voltage 53.2 V Float voltage 53.0 V Absorption time 1 Hr

Thanks Jaco, I will go through the recommended settings as per the document. I don't have an issue with the battery not reaching 100% full as i understood this is because of the 52v setpoint. but i am just trying to figure out what's changed or what the cause for the high voltage alarm is now, when this has not been an issue before. Feels like the battery and the MPPT are not communicating properly. I agree with you that the high alarm set under max voltage cant be right so will investigate this.

Hi Guys, I have a fairly new Victron Multiplus ii installation that has been operational for about 3 or 4 weeks now. Up until 3 days ago it has been operating without any issues but now, i am receiving high voltage alarms on my system. I have not made any changes to the system, so i am unsure why i am receiving the alarms or what the cause could be. Any idea's of what to check? The high voltage is set to 52v and the max charge voltage is set to 53.2v although its never reaches that high. It feels to me that the MPPT is maybe not reacting fast enough? As far as i know i am on all that latest firmware versions on everything. The battery is listed under my device list. The voltage spikes to just higher than the 52v setpoint, like 52.16v and it also gives an alarm at just under 52v, so i don't think i am actually causing any damage to the batteries and i have not noticed any alarm lights on the batteries either. Any help would be appreciated.