January 30, 20215 yr Thanks I have to admit that I do not fully understand why you switch your inverters on/off. My 2 are running 24/7 - even though I hardly ever draw more than the 4kW that 1 can provide. The inverters will always share the total load, which means that each will have to work less hard than running a single one But your system does sound quite specific, so maybe you do have a specific reason for doing so 18 minutes ago, vitecekmatrka said: No I have not send mail, i think Manie is very busy vith other bugs and requests...... I would just drop him a mail on Monday. My experience is that he still replies quite quickly
January 30, 20215 yr 1 minute ago, wolfandy said: Thanks I have to admit that I do not fully understand why you switch your inverters on/off. My 2 are running 24/7 - even though I hardly ever draw more than the 4kW that 1 can provide. The inverters will always share the total load, which means that each will have to work less hard than running a single one But your system does sound quite specific, so maybe you do have a specific reason for doing so I would just drop him a mail on Monday. My experience is that he still replies quite quickly Well, you know during night the 70W for each inverter is a power which sucking from battery I cant see any reason to run all 3 inverters during night when my AC load is 2 fridge and some computer in total less than 300W. that means in case 140W is lost power, in 24 hours is 3 kWh.... Sorry i have different oppinion about energy flow. Well Does anybody run here 3 inverters in parallel on ICC? anyone who see similar behaviour? thank you
January 30, 20215 yr 5 minutes ago, vitecekmatrka said: Well, you know during night the 70W for each inverter is a power which sucking from battery I cant see any reason to run all 3 inverters during night when my AC load is 2 fridge and some computer in total less than 300W. that means in case 140W is lost power, in 24 hours is 3 kWh.... Yeah, I know that problem. I have the same challenge at night... There is a line of code somewhere here in the forum that you can use to send an inverter into standby (and reduce self-consumption) and wake it up again - but it only works on Coulomb's patched firmware. And that requirement together with running the patched firmware is such a small target group that this is not anywhere near the top of Manie's list of feature requests (for which I can't blame him) If you are without PV production for a longer period of time because your panels are covered with snow, then I can fully understand. For my older Axperts, self-consumption is only around 40W. And I get PV production virtually every day, so for me it is only the time between sunset and sunrise and hence not that much kWh
January 30, 20215 yr 3 minutes ago, wolfandy said: Yeah, I know that problem. I have the same challenge at night... There is a line of code somewhere here in the forum that you can use to send an inverter into standby (and reduce self-consumption) and wake it up again - but it only works on Coulomb's patched firmware. And that requirement together with running the patched firmware is such a small target group that this is not anywhere near the top of Manie's list of feature requests (for which I can't blame him) If you are without PV production for a longer period of time because your panels are covered with snow, then I can fully understand. For my older Axperts, self-consumption is only around 40W. And I get PV production virtually every day, so for me it is only the time between sunset and sunrise and hence not that much kWh Hello yes conditions are different thats reason why Im uing this specific configuration. hence we know it is not the cable USB, what kind of feature or what may really cause this behaviour? any other idea? maybe reconnecting axperts interconnection of communication cables? I dont know, the connection is as in manual... dont see any reason why showing 2 same axperts in different clusters.... ??
January 30, 20215 yr 1 minute ago, vitecekmatrka said: hence we know it is not the cable USB, what kind of feature or what may really cause this behaviour? any other idea? maybe reconnecting axperts interconnection of communication cables? I dont know, the connection is as in manual... dont see any reason why showing 2 same axperts in different clusters.... ?? I would probably go back to the very beginning and start from scratch (even though it will probably be a bit painful): Switch all inverters off Disconnect/isolate loads, AC, PV and battery inputs from inverters Disconnect USB cable Power down Pi At that point, your system should be completely dead. Then Ensure that parallel cables are correct for all 3 inverters Connect/switch on battery input to all inverters (if your Kings are similar to my old model, then the inverters should go into standby). Do not reconnect PV, AC, or loads Switch on all inverters (they should now synch their parallel state and assign 1 Master and 2 Slaves - maybe check on the individual displays) Connect USB cable to Master and Pi Power up Pi, start ICC, and check if the problem still persists
January 30, 20215 yr 1 minute ago, wolfandy said: I would probably go back to the very beginning and start from scratch (even though it will probably be a bit painful): Switch all inverters off Disconnect/isolate loads, AC, PV and battery inputs from inverters Disconnect USB cable Power down Pi At that point, your system should be completely dead. Then Ensure that parallel cables are correct for all 3 inverters Connect/switch on battery input to all inverters (if your Kings are similar to my old model, then the inverters should go into standby). Do not reconnect PV, AC, or loads Switch on all inverters (they should now synch their parallel state and assign 1 Master and 2 Slaves - maybe check on the individual displays) Connect USB cable to Master and Pi Power up Pi, start ICC, and check if the problem still persists well yes Im gonna to do it now, why not 🙂 it will take couple of minutes.
January 30, 20215 yr 37 minutes ago, vitecekmatrka said: well yes Im gonna to do it now, why not 🙂 it will take couple of minutes. Hello I did it, changed connection data between inverters, but no change, Then Ive connected next USB cable to the not logging inverter and it started to work. Even a restart of the PI still logging well. I have fucking no idea what is the reason, but on raspi 3B it worked then i exchanged them only, no changes on wirin, usb cable and so on. now it seems it works but with 2 usb cablec connected to PI 4. same as it was yesterday for 3B+.... now all system logging all the values correctly. dont have idea why need 2 cables connected to raspi. in drawing of parallel connection for 3 and more is not written which No of inverter need to be a master, thats why i decided to have a master on I3 - according to the parrallel install brochure of axpert kings. well now it works but I would be happier if it would work as for other clients. Remember please in case I had 2 inverters only in parallel it worked well with 1 USB cable. Im open to try anything with inverters in my laboratory BR Vit
January 30, 20215 yr Cool - happy to hear that you managed to get it to work Just 2 follow-up questions: All inverters are set to parallel mode (and not single) - correct? On the older Axperts, this is setting 28 Do your Kings show on the display which inverter is Master and which ones are Slaves? My Axperts shows MS or HS for Master and SL for Slave on the display. Are 2 of your inverters showing SL and 1 showing MS or HS?
January 30, 20215 yr 17 minutes ago, wolfandy said: Cool - happy to hear that you managed to get it to work Just 2 follow-up questions: All inverters are set to parallel mode (and not single) - correct? On the older Axperts, this is setting 28 Do your Kings show on the display which inverter is Master and which ones are Slaves? My Axperts shows MS or HS for Master and SL for Slave on the display. Are 2 of your inverters showing SL and 1 showing MS or HS? Yes thats it, once they dont have parallel mode they wouldn´t sychronize and it will not work. master is HS, slaves shows SL.
January 30, 20215 yr This all sounds weird, but then Axpert firmware is not exactly written by geniuses... One thing that I would suggest - if you are not already there, make sure that you are on the latest firmware - 71.94 for the DSP (main unit) and 2.60 for the remote display. One other thing: is the "not logging inverter" always the same one? What happens if you connect to only that one (make it master by switching it on first) - can it see the others?
January 30, 20215 yr 3 minutes ago, Calvin said: This all sounds weird, but then Axpert firmware is not exactly written by geniuses... One thing that I would suggest - if you are not already there, make sure that you are on the latest firmware - 71.94 for the DSP (main unit) and 2.60 for the remote display. One other thing: is the "not logging inverter" always the same one? What happens if you connect to only that one (make it master by switching it on first) - can it see the others? Hi, well im using 71.93, display dont know from head. yes problems still same with the first one. I will exchange master to first one and reboot pi. i will post in 10 minutes.
January 30, 20215 yr 4 minutes ago, vitecekmatrka said: Hi, well im using 71.93, display dont know from head. yes problems still same with the first one. I will exchange master to first one and reboot pi. i will post in 10 minutes. Well inverters in parallel connected via 1 USB cable, now I see 2 inverters twice ( master channel )... so thats strange. maybe it is some internal issue, in ICC, maybe it sending by USB communication twice in row masters, and then other channels. its my idea. It may be to discus with Manie. but who cares Who running 3 in parallel with theese similar as me..... needs to say again Im also using ONE victron device on it MPPT 70A
January 30, 20215 yr 1 hour ago, vitecekmatrka said: display dont know from head The remote display handles all the parallel communications - could be important. When facing strange behaviour it is generally good practice to be on latest...
January 30, 20215 yr 6 minutes ago, Calvin said: The remote display handles all the parallel communications - could be important. When facing strange behaviour it is generally good practice to be on latest... Kindly didnt look at, but, may I ask for a download link for the firmware 71.94/02.60 very thank you BR Vit.
January 30, 20215 yr Remote Panel 02.60 : https://www.ostrovni-elektrarny.cz/support/Axpert/FW/RemotePanel_Reflash_MCU(02.60).rar For firmware 71.94 see downloads section on this site.
January 30, 20215 yr 28 minutes ago, Calvin said: Remote Panel 02.60 : https://www.ostrovni-elektrarny.cz/support/Axpert/FW/RemotePanel_Reflash_MCU(02.60).rar For firmware 71.94 see downloads section on this site. Hi Calvin, Thank you o much. ive done it, o maybe in following days I will do it. thank you so much for help even I dont think now that this will solve this strange behaviour of three parallel. do you personally have 3 in parallel connected to ICC 3.1 via 1 USB cable to master only? ?? thank you BR Vit
January 30, 20215 yr I have 3 in parallel same as yours, but I do not use ICC - I have developed my own solution on a microcontroller. One way that you can easily test: use WatchPower, connect to one inverter only. If you see all 3 inverters in Watchpower the problem is with ICC, otherwise the problem is with one of your inverters. By the way, the connection can be to any inverter - it does not have to be to the master.
January 30, 20215 yr Just now, Calvin said: I have 3 in parallel same as yours, but I do not use ICC - I have developed my own solution on a microcontroller. One way that you can easily test: use WatchPower, connect to one inverter only. If you see all 3 inverters in Watchpower the problem is with ICC, otherwise the problem is with one of your inverters. By the way, the connection can be to any inverter - it does not have to be to the master. OK this make sense, Im also on a edge to use my own but im not so good programmer, so I dont want to spend time with it. im posting on PV output, and emoncms, Yearly generating 9MWh, I dont think a problem in inverter as they are brand new (problems from installing all three. no idea now... thank you for description your plant. . im also sure not needed to master - bcs in case of fault, channel changeover appear and still works and must end data... so i think similar... BR Vit
February 4, 20215 yr The serial number for each inverter is stored in EEPROM on the control card. They are assumed to be unique. If you used a setserial program to force a particular serial number, that could cause the duplicate, and all sorts of crazy things could happen. Rarely, the EEPROM might get corrupted or somehow get its serial number overwritten. You could talk to each inverter separately (with the other 2 turned off) and record what serial numbers each returns. The second number in the QPIGS response starting with 9293 is the serial number. To fix this, you'll need to get your reseller to send you a setserial program for the inverter whose apparent serial number (returned by QPIGS) disagrees with the label on the side of the inverter. They will require all sorts of proof of ownership, and the setserial program has to be hand-made for your particular machine's serial number.
February 4, 20215 yr I have asked Manie to assist with this. Can you please get in contact: [email protected]
February 4, 20215 yr 2 minutes ago, Clovie said: I have asked Manie to assist with this. Can you please get in contact: [email protected] Manie contacted me few minutes before.... Im a client with more licences ( 2 in total ) but trying to create Manies good live feedback on 20 kWP plant with 3 parallel inverters... Thank you Clovie Best Regards Vit!
February 4, 20215 yr Dear colleagues. I have to thank a lot to Manie, we went thru my plant, he really connected to my both raspi, where is logging system. He repaired the bug, now it works. we went thru some typing what is wrong and what is not OK at my plant. problem was finished once 3 inverters thru 1 usb communication was by some sudo in terminal done.. I can read all correctly shown inverters per 1 usb cable ... People, who dont want to waste time shall buy ICC, a for me perfect logging system! prior learning linux from begining.... Im not a programmer but ICC is really good product. Best of all I appreciate real online feedback and solving troubles with my system which is giving feedback to me and Manie. Hope all of you would buy ICC license to help a bit Manie, becaue product like ICC has no competitor. Thank you once again. BR Vit Dear Coulomb Thank you for your feedback also it helped. nice evening to all of you
February 22, 20215 yr On 2021/02/04 at 11:02 PM, vitecekmatrka said: becaue product like ICC has no competitor. Until you see solar assistant: https://solar-assistant.io/
August 7, 20214 yr Hello guys, hello Coulomb, I have an issue with parallel 2x Axpert MK II (Easun Solar SMV II) 5KVA/ max450V solar. When both invertors are working and both invertors have solar input, the output voltage fluctuates, PV becomes unstable and every few seconds PV input suddenly drops to 0W and even light bulbs in the whole house can be seen flickering... Each inverter run as single works perfectly - both 230V output and MPPT charging With just one inverter turned on in parallel setup, both invertors work well as MPPT chargers, providing the 2x2500W solar input but the output is limited to just one inverter Parallel 2x5kW they give output up to 10kW -rock stable with no fluctuation but without solar, ... but when there is solar input on both of them, the system becomes unstable (fluctuating output voltage 210-240V, output power +-50%, and PV swings in the range 0- 5000W within a few seconds like a roller coaster... surprisingly it posts no error here, but the PV generation is flutcuating and output power almost unusable What I did so far - without any success: updated firmware from 71.50 to 71.82 (as posted on this forum, there was a discussion with unstable parallel Axperts) purchased a new inverter, tried Old1+New, then Old2 + New.... no change I blamed the current sharing cables, so I shortened them replaced with thicker cables and checked with continuity mode Tried new wiring - keeping all cables same lenght etc... checked the parallel connection etc. Tried removing the output circuit breaker and connecting the parallel outputs directly to minimize any interference Both invertors are connected to a single battery bank (400Ah lead carbon paralleled with 200Ah lifepo4 - well tested). Each invertor has a separate PV array (2x 2500W loaded panels around 200V - one slightly west and other slightly east. Any Idea what else can I do? Maybe there is a fault in the parallel board but no other way to find out than to purchase two new boards... which is quite costly. Or there can be any type of interference between PV arrays? Thank you very much for your help, any working solution will be rewarder. With kind regards, Vladimir, Czech Republic. Edited August 7, 20214 yr by Vladimir
August 8, 20214 yr Update to previous post: It seems to be related to the Current sharing cables. During parallel operation, there is 0V on the cables (AC or DC) and no current (measured with a precise clamp meter). Likely cause: Burned parallel board Burned something else inside the inverter Faulty internal cables (the cables between inverters were checked previously) Or am I wrong? There is supposed to be some voltage or current on the "Current sharing cables", right? Edited August 8, 20214 yr by Vladimir
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