Tarek Yag

I've just flashed the 90V Patch onto my inverter. The day will start in a few hours, so I will be providing first day data graphs by the evening. Hopefully it will be a sunny day with some clouds as forecasts tell. Moreover, while on the 100V Patch last day, I tested enabling the buzzer for power source change, unfortunately, I still got so many buzzes at the beginning and end of the day. I will see if things get better on the 90V Patch. I'm glad you figured it out by yourself. I also checked again my interactive data graphs inside DessMonitor platform and it shows that there have been actual records at the time. I was afraid that the graph had too many data fillers caused by my internet outages that day. Yep, I am more than happy to test things out. It's my please to cooperate with you! Thank YOU for being the firmware hero! No worries mate, I appreciate your work very much. I understand how hard it is to keep track of all the details, and having to pull out information while troubleshooting.

So, attached are the data graphs for PV (Current, Power, and Voltage) for the last 3 days after testing the (100V patch).. 2023-11-27: Stormy and Cloudy 2023-11-28: Mostly Cloudy 2023-11-29: Partial Clouds. Data is very intermittent because of very frequent internet outages The last day I witnessed the least amount of time without power input while PV is present (the least stuck at 60V issue). @Coulomb, do you think I should test a patch for 90V for even better results than Wednesday? Data Graphs (100V Patch) Test 2.rar

I am currently in a very low energy consumption period of time (temporarily), so my batteries are never empty. Even in sunny days from previous days, I won't get more than this amount of energy. Additionally, the inverter is getting 30+ minutes of AC input just 2 hours before PV starts charging, which brings them to the constant voltage charging stage. The sampling interval at DessMonitor free service is 5 minutes. I have previously mentioned the sampling interval.. Exactly! I also mentioned this in my issue description..

Today I tested the patch for a whole day. The weather today was heavily clouded, rainy at times, and sunny at other times for short periods of time. Attached are the data graphs for today as the first test day for the 100V patch. I will provide more graphs later for the following days up until we have a sunny day to make the final test and assess whether my setup needs a 90V patch or not. 2023-11-26 PV1 Current 2023-11-26 PV1 Power 2023-11-26 PV1 Voltage Huge thanks to @Coulomb for making all of this possible and happening! Data Graphs (100V Patch) Test 1.zip

I will try my best to test the latest patch within the next 24 hours. Errands are piling up...

Already mentioned in my first post describing the PV stuck issue in details..

Oh sorry, I just got your idea. Yes you are right. I hope Coulomb already got this correctly!

Sure, all of the needed graphs for the same three days are attached here now. Actually I took new screenshots for PV1 Current so that all the graphs overlap over each other when explored sequentially in a photo viewer. 2023-11-19 PV1 Current 2023-11-19 PV1 Power 2023-11-19 PV1 Voltage 2023-11-22 PV1 Current 2023-11-22 PV1 Power 2023-11-22 PV1 Voltage 2023-11-23 PV1 Current 2023-11-23 PV1 Power 2023-11-23 PV1 Voltage It is genuine panel current as you can figure out by yourself from the other graphs now. Data Graphs.zip

Please precisely review the specifications of the normal and the TWIN models of VM IV You can find the answer in there. TWIN models start at 60 V MPPT

Dear @Coulomb, I have just tried firmware 560.06 but did not get any PV power input (0.1 A, 0 W) although PV voltage was totally normal according to this sunny day. Same happened with firmware 260.06. So I reverted back to firmware 60.06 which restored normal functionality for my VM IV-4000 TWIN. Note: my original firmware was 60.05, so at the end I benefited from a new firmware with a minor version increment of 1 😜 I will send you in a bit some screenshots for more details on all my firmware testing this morning. ------------------------------ Anyhow, for everyone's reference, attached in a later post in this topic some historical graphs for my PV (Current/Power/Voltage) with my (stuck at 60 V) issue. Graphs data are collected every 5 minutes. 1- November 19th (Raining All Day) got almost no PV power all day long. 2- November 22nd (Mostly Sunny) as always, no PV input for almost the first hour and almost the last 1.5 hours 3- November 23rd (Sunny) no PV input for the first 50 minutes and almost the last 1.5 hours I will be posting new graphs for comparison purposes after we get the firmware totally working on my inverter!

Not that I'm aware of. I just like to keep every software up to date! It's a sort of good practice in software.

Hi @Mika, Thank you for your share. Since you posted this update, are there any newer versions for the same model? This exact firmware applies to VM IV-4000 TWIN too, so I'm very interested in any updates for U1 or U2. I currently have U1 (60.05) U2 (39.09) installed on my inverter. Best Wishes, Tarek

Thank you for your suggestion, you're right indeed! I might double my PV panels capacity in a year or so, but for the meantime, I think a firmware patch might ease the issue. Budget is too low right now.

Hi again @Coulomb, I apologize for not following up in a timely manner due to some normal life issues which can always get you too busy and change priorities! Now, let's go straight back to my PV stuck at 60 V problem.. Observations: 1- At dawn, during the very first 1-3 minutes exactly of PV input, the inverter beeps several times repeatedly indicating that it is gaining and losing PV with every beep knowing that "Beeps While Primary Source Interrupt" setting is enabled. In more details, when PV input reaches 60 V for the first time it beeps, then 0-3 seconds later it beeps again and PV input falls right back to 0 V, then gradually raising again to 60 V and beeps again. 2- After several alerts, inverter stops beeping and PV voltage never goes below 60 V again with input current always being 0.1 A while PV voltage starts raising up, this lasts approximately for less than 2 hours with no PV power input. Lastly, PV input current starts raising above 0.1 A which starts giving PV power finally. 3- Before dusk, PV goes back to the same state at dawn showing the same issues in reverse order. In more details, around 60 V, input current 0.1 A, 0 W input power for about another 1.5 hours 4- At dusk, inverter beeps several times repeatedly indicating that it is gaining and losing PV with every beep for another 1-3 minutes, until it completely stops. My PV Setup: 3 x LG MonoX Plus LG445S2W-U6 wired in series Specifications sheet attached PV panels usually reach 123 V at peak and a max power of around 1090 W, which is the best possible outcome in summer (near STC electrical properties) Reference: You will also find attached my inverter log (formatted) for the entire day of September 10, 2023. ---------------------------------------- A. Would you please confirm that this is a stuck at 60 V issue? B. Regarding your already patched VM III TWIN firmware for stuck at 90/120 V bugs, could it solve or ease my issue? B. Would you please make a patch for this firmware bug? Best Regards, Tarek Y. LG MonoX Plus S2W-U6.pdf Inverter Log 2023-09-10.xlsx

Exactly! My bad I didn't type it correctly from my photo of the display. I corrected it in my original post for future readers. This is great news for me! My Inverter's serial number shows that it was manufactured in April 2023, which most probably means that my supplier upgraded the firmware before selling the unit! I'm impressed! I came to the same conclusion too after reading many topics here in the past couple of days. I will provide you with much more information with graphs tonight, so you can decide whether it is a normal behavior or a glitch. I'm totally new to MPPT chargers and I'm not 100% sure that the behavior I'm witnessing is abnormal! And yeah, I will have to reflash with a patched firmware to fix the issue, as I expect it will be much worse in the winter. Thank you very much for your prompt and quick response. Best Regards, Tarek Y.

Hi, First of all, big thanks to all supporters and followers of this great forum, and special thanks to @Coulomb for his unmatched efforts and work! I am a big fan of this forum and have been following since a couple of years. I used to have a very old inverter for the past 4 years (an unbranded Axpert EX 3000-24), but recently I wanted to upgrade directly to one of the most recent models. Furthermore, a week ago I bought a brand new Axpert VM IV TWIN from a trusted local supplier named "Marvel" which they have their own brand printed on the original Axpert with an 18 month warranty. As a Software Engineer, I'm very obsessed with everything software including firmware. I'm currently looking to upgrade my inverter's firmware to the latest available version. I searched a lot in this forum in the past couple of days but never found a way to fetch the latest version of a firmware other than by posting current details and asking the question in a new forum thread. So, excuse me if I'm doing it the wrong way. Attached are the photos of the inverter's sticker, U1, and U2 firmware versions. U1 (60.05) U2 (39.09) Additionally, I believe that I do have a (stuck at 60 V) issue with my MPPT charger that I will explain right after I get a reply about the latest firmware. Then I will be asking about upgrading the firmware of the Wi-Fi Kit that comes with my inverter which is connected to DessMonitor platform (SmartESS). Kindly, Tarek Y.

Thank you so much for your effort in explaining to me and for your time, I really appreciate it so much! All the best to this great community!

Thanks again for your replies, I appreciate it so much! 1. Is there any way to show the missing settings and "Charging current" on main screen? I was never able to reproduce how it showed then for once! 2. Can I get a patched firmware for my inverter by paying someone trusted here in this community?

Thank you for your reply! 1. As screenshot 1 shows, there are a few missing settings including: "Output voltage", "Max SCC charging current", "Charger stage", "CV charger time", "Record fault code". A few months ago, I kept WatchPower open for about 48 hours and suddenly the program started showing more settings and correctly displayed "Charging current" on main screen when in bypass mode. Then, I was never able to keep my laptop connected for this long again and everything reverted to regular when I closed WatchPower and opened it again! 2. I had a typo in this. I meant when in bypass mode, the main interface shows "Battery discharge current" instead of "Charging current" as shown in screenshot 3 3. Isn't there any way to upgrade to a custom firmware?

Hi, I'm a complete noob here, so excuse me if I'm asking a repeated question, although I made my best in searching. A few years ago, I bought a brand new Voltronic Power Axpert EX 3KVA 24V (EX-3000-24) inverter from a local retail shop. I'm currently looking to upgrade the firmware of my inverter because the version of WatchPower that came with the unit (1.11) and the latest version (1.13 SP7) both show less than normal settings, and doesn't shows battery discharge current instead of charging current in AC mode. Attached are an image of my inverter's sticker and two screenshots from WatchPower, one showing the current firmware version. I contacted Emily from Voltronic Power and she just told me that your unit is out of warranty and there's no newer firmware! Please inform me on what should I do to upgrade the firmware. Thanks, Tarek