January 25, 20233 yr Author 19 hours ago, Coulomb said: Unfortunately, one of my inverters has a dead power supply, so that has to take priority. No worries mate, you gotta do what you gotta do, whenever you got the time....cheers Can you check the battery charge current for each? Check out this weird charging profile difference between USER and FLD. The first is a peak- like increase then tappers down charging current but FLD almost instantaneously max 20A current maintained over the bulk stage then dropped quickly. Interesting eih?
January 25, 20233 yr 3 hours ago, mafiose13 said: Check out this weird charging profile difference between USER and FLD. I can't think what the cause might be. It's presumably part of the reason for the difference in bulk stage time.
February 8, 20233 yr I have bought this inverter Axpert VM III TWIN but i have some issue with the mppt because at the morning oscillate from 0v to VOC 180v (4s 550w solar panel), the production start when there are the red arrow in the aftenoon the voltage go down and it stack to 60v, purple line is the same solare panel of the 4 series connected to the inverter but it is connected to a victron mppt 100/20 Now i have this firmaware U1 56.05 U2 25.05 @mafiose13 do you have the same issue when the sun go up e when it go down?
February 8, 20233 yr I note that the VM III Twin firmwares are all over the place. I do have a 56.97, but that seems a long way from 56.05. But there also seems to be 55.xx and 60.9x for that model. I'm hesitant to suggest updating to any of these, let alone go to the trouble of patching one, unless I can get more clarity on what the differences are. There are even three display major firmware numbers (25, 19, 44).
February 8, 20233 yr I contacted the seller and he told me that there are new versions as soon as they send me the software I will post it
February 8, 20233 yr @Coulomb can I use the usb cable or I must use the rs232 cable? I found online some instructions that connect only the AC in no battery no PV... Can I use only the battery?
February 9, 20233 yr 8 hours ago, lucass said: can I use the usb cable or I must use the rs232 cable? You should be able to use either for the main DSP, but display firmware has to be from RS-232. 8 hours ago, lucass said: Can I use only the battery? Yes.
February 9, 20233 yr These are the firmware U1 56.11 e U2 25.08, the seller told me that to flash it i need to inser a 3k ohm resistor on the TX cable of rs232 (white wire in orignal cable)... today i will record all the data if there are some improvement VP5K.hex mcu.hex
February 9, 20233 yr Wow, just raw hex files. For the display, you'll have to find the appropriate reflash tool, I believe. Looks like it should be Remote Panel_ReflashTool.exe with 5 DLLs. Let me know if you need help with that. Thanks for the files. Edit: Proper VM III (etc) 25.08 display firmware update file is in this post. Edited March 17, 20242 yr by Coulomb
February 9, 20233 yr 2 minutes ago, Coulomb said: Looks like it should be Remote Panel_ReflashTool.exe with 5 DLLs. Yes i have this tool and the 5 ddls. Can you adjust the parameters of this inverter? mppt algorithm?
February 9, 20233 yr Author 23 hours ago, lucass said: Axpert VM III TWIN but i have some issue with the mppt because at the morning oscillate from 0v to VOC @mafiose13 do you have the same issue when the sun go up e when it go down? Hello, the issue on my end is not oscillation/fluctuation, it's a steady increase in voltage up to 118-120v, stuck at that for a while with mediocre PV output 1-10W, then sharp shoot voltage to 260-270, the opposite happens in afternoon, sharp drop and lingers at 120. This is much much worse on cloudy days. Hence, most are calling it the "stuck @..." I've now installed a dozen or so of this unit, all same, with different production dates/batches. Some mainstream models have patched firmware to address this issue, as well as the premature float bug, but not this model yet. Hopefully when Coulomb's time permits he can help out, otherwise...it is what it is with Voltronic(s). Please report back when you do that firmware upgrade .
February 9, 20233 yr 4 hours ago, lucass said: Can you adjust the parameters of this inverter? mppt algorithm? I should be able to. I've just finished patching an Axpert Max 8kW '28066 for Georg's shade management patches. My head is still spinning after that one, phew. Perhaps next. These seem like popular units.
February 9, 20233 yr Hi! I'm trying to connect the Axpert VMIII Twin 4K to the Felicitysolar LPBF2400-M lithium battery, but no luck... I tried everything and I'm almost sure that the problem is in the firmware... So, I made the communication cable according to the instructions: inverter 3 >> 5 (BMS port on Battery) inverter 5 >> 6 (BMS port on battery) And, I'm trying with all options/settings in Axpert's program 05: Pyl, Lib and Lic. It doesn't work with any option, it always gives error 61... Further, I generally have a problem with communication with that model of Axpert... Watchpower works fine with Axpert VP/VM 3KVA, also with VMIII-5000 48V, but won't with VMIII-Twin 4K. Neither via original RS-232 cable, nor via WiFi... I even tried the USB connection from the PC. Does not work. Again Firmware...? Maybe anyone can help me?
February 9, 20233 yr Author 5 hours ago, Coulomb said: I should be able to. I've just finished patching an Axpert Max 8kW '28066 for Georg's shade management patches. My head is still spinning after that one, phew. Perhaps next. These seem like popular units. I saw ur post in that thread. Quite a feat...kudos to all your efforts! Looking forward to test some firmware when their time comes about 👍. I have a few units running within my access that I could cross/compare...cheers mate
February 9, 20233 yr Author 3 hours ago, Mika said: Hi! I'm trying to connect the Axpert VMIII Twin 4K to the Felicitysolar LPBF2400-M lithium battery, but no luck... I tried everything and I'm almost sure that the problem is in the firmware... So, I made the communication cable according to the instructions: inverter 3 >> 5 (BMS port on Battery) inverter 5 >> 6 (BMS port on battery) And, I'm trying with all options/settings in Axpert's program 05: Pyl, Lib and Lic. It doesn't work with any option, it always gives error 61... Further, I generally have a problem with communication with that model of Axpert... Watchpower works fine with Axpert VP/VM 3KVA, also with VMIII-5000 48V, but won't with VMIII-Twin 4K. Neither via original RS-232 cable, nor via WiFi... I even tried the USB connection from the PC. Does not work. Again Firmware...? Maybe anyone can help me? I have this happening with many voltronics as well connecting to 24v or 48v Felicity lithium. maybe someone can help figuring it out. If you don't get responses, can you put it up in the battery/thread or make it its own thread to get the attention needed.
February 10, 20233 yr Having had a quick look at the protocol, it doesn't seem like it's Pylontech. I thought it might be LIB or LIC, but you've tried both of those. I assume you've waited about 2 minutes for each; the manual says it takes about a minute to connect (seems really slow to me). I know that later display firmwares for some models have more BMS protocol options. It would be really helpful to find out what protocol the Felicitysolar BMS uses. A quick search was not fruitful. It may be that a later display firmware will have the BMS protocol you need.
February 13, 20233 yr Author On 2023/01/04 at 9:19 PM, mafiose13 said: No snow, my numbers are from a best scenario on peak hours and bright sun. If the panels see a sight of a cloud they drop to watt production in the 10s or 20s ...even at peak hours of the day. They just seem over sensitive to just anything. They are though facing South, 10 deg slop at lat 34. Not ideal but i am forced with this orientation due to roof orientation. I have a another similar system of the 6 panels at my summer house that is 35deg tilted due north that for example got 2.4kw peaks today, started production at daybreak 7AM and immediately hits 220v from those hours. While this one hangs at the 119-120 produces 10-30 watts despicably till about 10:30 am then voltage kicks ups to the 200s, steadily improving till 1 pm peaked 1350w then declines to 3pm then by 4:30pm eventhough the sun is out i get barely 20-30watts. So guys I want to report back something positive. After struggling for quite sometime on this particular installation, I decided to remove those panels (6x550w jinkos), move them to the building's rooftop, make a metal chassis with "perfect" orientation (Dead south 180) n Azimuth (35) for the location. Previously west facing @ 15 degree tilt. Max PV output at peak previously was 1580-1600 watts! Max PV output 30min pre-peak today post move was 3017 watts! We were averaging mediocre 2.5kw/day generation....we averaged a whopping 12.5kw today...5 Fold increase.....WOW! It's not all & always firmware issues...
February 13, 20233 yr Author On 2023/02/10 at 3:45 AM, Coulomb said: Having had a quick look at the protocol, it doesn't seem like it's Pylontech. I thought it might be LIB or LIC, but you've tried both of those. I assume you've waited about 2 minutes for each; the manual says it takes about a minute to connect (seems really slow to me). I know that later display firmwares for some models have more BMS protocol options. It would be really helpful to find out what protocol the Felicitysolar BMS uses. A quick search was not fruitful. It may be that a later display firmware will have the BMS protocol you need. After consulting with felicity dealer on another continent. He supplied the following. Looks like it's PYL setting which I've not tried, I'll also double check my pin connection. Hopefully, it works, but asking around all my friends in the field no one has been able to successfully connect any felicity lithium to a voltronic....i hope it's as easy of a fix as that. Felicitysolar battery using guide (6).pdf
February 16, 20233 yr @Coulomb are there any parameters to eliminate the purple spike and flat area at 60v in the morning and evening?
February 17, 20233 yr On 2023/02/10 at 2:45 AM, Coulomb said: Having had a quick look at the protocol, it doesn't seem like it's Pylontech. I thought it might be LIB or LIC, but you've tried both of those. I assume you've waited about 2 minutes for each; the manual says it takes about a minute to connect (seems really slow to me). I know that later display firmwares for some models have more BMS protocol options. It would be really helpful to find out what protocol the Felicitysolar BMS uses. A quick search was not fruitful. It may be that a later display firmware will have the BMS protocol you need. Yesterday I updated the MCU to newest version 25.08 (the old one was 25.05), but it still doesn't work...
February 17, 20233 yr 27 minutes ago, Mika said: Yesterday I updated the MCU to newest version 25.08 (the old one was 25.05), but it still doesn't work... I cannot help but thinking I am glad I got a cheap clone that just works as it should be. 24V Axpert type.
February 17, 20233 yr On 2023/02/10 at 3:45 AM, Coulomb said: Having had a quick look at the protocol, it doesn't seem like it's Pylontech. I thought it might be LIB or LIC, but you've tried both of those. I assume you've waited about 2 minutes for each; the manual says it takes about a minute to connect (seems really slow to me) They are very slow. Sometimes more than 2 minutes.
February 17, 20233 yr 20 hours ago, lucass said: are there any parameters to eliminate the purple spike and flat area at 60v in the morning and evening? Sorry, I don't know; I'm still confused about what's the best way to fix this MPPT bug. Once that is determined, actually patching it isn't all that hard. My impression is that most of the latest patches don't lose much real power at the start and end of the day.
February 17, 20233 yr 3 hours ago, Mika said: I updated the MCU to newest version 25.08 (the old one was 25.05), but it still doesn't work... So there were no new battery type options to try?
February 18, 20233 yr Author Yet another bug....(perhaps) At night for some odd reason, I always have a constant voltage of about 60v. (check attached screenshot). The problem this creates is that if we do get government grid power I think the inverter is seing this PV 60v contribution and only giving me about 10-12A charging from grid since it's SNU setting output and solar first charging. Max total charge set at 30A, Utility at 30A. As you can see in the 2nd photo, 3-4 hours of grid stayed at about 10A battery only reached 25.5v during this time. Am I missing anything in terms of settings? or is this 60v causing the inverter to balance charging between what it perceives as pv contribution and grid? On a 2nd note @Coulomb, how hard would it be to set the mppt point to 90 vs stock 120 on this firmware?
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.