Jazdzor

My brother have VM 4 twin with U1 5609 ->56.10 U2 3909 It safe to upgrade U2 to 25.15 ?

I have 8xJinko JKM480N-60HL4-V and 8S 280Ah EVE V3. I would probably buy 8S more EVE because price is incredible now -465$ DDP but for 48V inverter would be better 48V ofcourse.

I have a technical question and I'm counting on some advice. I've already updated my new inverter Voltronic VM IV 3600 to the latest available versions 61.03+22.21 and I was hoping to be able to turn on the Eco mode - unfortunately the inverter draws 18W at rest and after switching on the converter without load it draws 75-80W just to maintain operation. Can i turn on the Eco mode in it?, or is there a firmware that will slow down the fans? I think it would be possible to reduce a good 10W by muting the fans. Maybe you have some other methods? I don't hide the fact that energy efficiency in offgrid is very important to me. I realized that I will probably need a larger inverter - can you recommend a decent one in the 6-12Kw range that could have the most refined firmware and will be more energy-saving? Regards!

Update I make new data cable with 1k resistor on data line and successfull flash dsp to 61.03. Can i flash mcu from 122.12 to 22.21? Watchpower still doesnt see my unit VIA rs232, probably for old screen firmware. Serial number check VIA port com1 work Perfect now.

Those chips are on boards OTG USB flashing VM3.hex from drive end with U03 error @Coulomb Yyy.. i've checked again and on photo before flash there is (!) before 22.12 so my display firmware is 122.12!!! 😱 What should i do now? https://youtube.com/shorts/IlhuhAzz0c4?si=RnK84KpiiCkQCP1b

I was try upgrade VIA micro USB org serial port (Cypress Voltronic inbuild). I think if IT possibile i must upgrade display firmware and than main firmware. I Hope connecting vianRJ45 can solve my problem.

😫 I've got 61.01 and 22.12 Plan was to upgrade 61.03 first than 22.21 When 61.03 progress go to 7% screen show 32 error and flash stopped. After restart cant flash because screen not response for accept Upgrade touch buttons. Upgrade start when i reboot with connected USB and boot probably to bootloader. Unfortunately this flashing stop randomly 2%, 4% sometimes 7% and again 32 after restart. Should i flash screen 22.21 first? I dont want to do worse now. I have J-Link and STlink V2.1 but i couldnt find flash bin dump.