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Hello. I am little bit lost now in firmwares. I have installed version 90.09 with min. adjusted to 285V. Display version 12.21. I have some shadows in the morning an evening. Total time about 1 hour. Is shadow management version better for me? Today was cloudy weather and PV1 current about 0.5A whole day. PV2 the same. Is there available version with functional led bar?

No it isn't factory version. Factory version was 12.11 I think. After some time a flashed 12.13. Two weeks ago I installed 12.21. Everything working without troubles. I don't know what is different between mentioned versions.

Hello Coulomb. You wrote that display firmware 12.21 is for non Easun max inverters. But I have it installed on my Easun Max. Is it OK? Or should I change it to another version? Thank you.

If led bar desnt respond, try to restart inverter (completely off). It happened to me also few month ago, and restart helps.

Hello Georg594. Thank you again. After check of the datas from last days, Ican tell that you have right. If solar power is lower that active power (consumption), than bus voltage drops near to 380V (379-385V). Hope it helps.

Hello Georg594. Please, if you find some time. Create a version for me with the limit set to 250V. I've been watching the graphs for a long time, and under some weather conditions, the voltage goes below the 280V limit of the 90.09. version. Thank you very much.

Hi. Ihave tried 280V version. This version worked pretty well, but I also tried the 200V version and I found that during cloudy skies the MPPT goes lower than 280V. The lowest voltages in my graphs was 261V. (current 5,2A) I beg you. Please, can you adjust the MPPT lower voltage to 260V for me? I think this will be the right compromise for my solar system. Thank you sincerely.

Ok. Now I know, that I don't realy want to make my own patched firmware. I don't have enough knowledges. I have to rely on your knowledge and your willingness to help. Thanks.

Hello Georg. Is it difficult to modify firmware? Is it necessary to have some special equipment? (software, hardware) I would like to be able to edit it myself.

Yes of course.

There were nice sunny weather so I must wait for some clouds. I will let you know and put some graphs.

I thing that now its more clear for me. Did you try to set incement for example 2V instead of 20V? (not zero) What will happen? Bellow is curves of my solar panels. I didnt find P-V curves, only I-V curves.

Hello. Here is voltage graph with flashed version 90.09 280V. I don't know why but the Voltage is quite high at the beginning. Maybe 280V is to much. In any case, I will wait for cloudy and rainy weather. George594, please can you explain us something about your sentence: "And under this the MPPT reduce the voltage in every calculation of 20v until it's again at 90v what is the lower limit. In this code sequence i reduce the subtraction value of 20 to zero" I dont understad why zero. I have a feeling that after your firmware modification, the voltage increases, but the MPPT does not try to "load" the panels. Why was the tension so high in the morning? Look at the attached graph.

It was not necessary to flash display unit. Attached firmware update procedure. Firmware Upgrade SOP via RS232.docx

Hi. Version 90.09, 280V. With reflashxtool. I spend 12 minutes with it. After that I flashed display unit firmware to.(12.21)

I see you use smart phones for monitoring inverters. However, it can also be done via PC. You open this page: www.dessmonitor.com , log in with the same username and password like in the application and that's it.

Good evening. So the firmware from Georg594 is flashed and the inverter works fine. The voltage value on the south-eastern string PV1 was around 300V for a long time and the current slowly decreased. At the end of the day, when the current reached almost zero, the voltage dropped to about 100V. In one sentence, PV1 kept producing until the last moment. I have never had such a smooth end of day production. I will continue to test it in the scope of my free time. Georg594 thank you again for your help and your time.

I dont know, we will see tomorrow. I am curious.

If I remeber well it was 72.03. And yes it is SMW8K white.

Thank you very much. I wil try it. I am very curious how it will work. I will let you know and post graf of PV1 again.

Yes, you have right. I have 10 on PV1 and 10 on PV2.

This is how my PV1 MPPT voltage looks like.

Hi. I have 10 Canadian solar 385W on each string. That is, a total of 20 pieces. Open circuit voltage is about 400V-412V. So should I try at first your first release? (based on 90.06) Or directly Second? (beta release 90.08) I read what the difference is between your firmwares. But I don't know which one would be more suitable for me. Thank you very much.

Hi I have an Easun inverter. I think it's not a clone, because I flashed 90.06 into it and everything works as it should (except for mentioned MPPT bug). Do you think I should try your firmware version? If something doesn't work, is it possible to go back to the original (or 90.06)? What's your opinion on that? Well thank you.

Hello. Why did voltronic make a good inverter and put bad firmware in it? Sometimes it happens to me that the mppt voltage is 90V and the current is 1.6A. This is completely nonsensical. Do you think there is a reason for this, or is it just a bug in the firmware. When I disconnect one of the strings and connect it again, the voltage on both strings increases to the nominal value (330V). When it is cloudy, production is minimal. The old 5kw variant worked even when it was cloudy with the same PV field. I am very much looking forward to the day when this error can be solved.