No, there wasn't any tricky.
I must use serial. I do not have real serial port with my computer, so I use USB to serial adapter. That adapter is good one and works like real serial port.
That why I must use serial was, because that update program, what came with 7z pac, works only with serial.
When I update MCU I just start program "Remote Panel_Reflashtool.exe" in the computer and in the program I first select right serial port and then I push "Update MCU" to start update. Then that panel go to black and it took ~9min to erase and write per inverter (or maybe that was 6min).
When I update FW I just start program "AxpertKINGReflash.exe" in the computer and in program I first select right serial port and then I push "Update" button to start update. Then whole system "goes down" aka stop feeding my home and not charge or take any power from anywhere. Then panel shows to me:
I'm not sure if I must push the button next to YES word, so I push it.
Anyways, there wasn't any problems. That phase took also appr. 10 min per inverter.
I do all MCU updates first and then FW updates. (I have three inverters and 3phase system)
And ofcourse, first of all, I un(7)zip both packets to they own folders and start programs from those folders. With MCU I left all other setting as is (Baudrate 19200), only Serial was that what I choose.
[ Edit Coulomb: 7-Zip is a free program for zipping and unzipping archives; it is free to download
. I have it installed, so I don't know if Windows knows what to do with a .7z file if it's not installed. Those needing more details, like which cables and USB to serial adapters to use, may find the PIP-5048MS firmware upload instructions
helpful, but of course they won't apply perectly to the PIP-5048MK. ]