Growatt 6000T DVM - error 51 after fw update

[ATOMAN]

Hey, that's my first post, so yay!! I'm from Miami and got a 6KW PV, 10KWh LiFePo battery bank and the now useless 6kW Growatt. All worked fine since December '20.

My Growatt 6000T restarted for no apparent reason ones or twice a week. Growatt told me to upgrade to latest fw TMS320F28035_GW510.04_202105310957.bin. I did so and now all I get is error 51 after turning the inverter on. There is no load at all so the message is not fitting the situation. Technical support just told me to lower the load Less than 0 is a no go!

I tried all what came to mind. Re-flash, PV on/off, AC on/off, small load/no load, leaving it off for 24 h, make a hand stand, check it without glasses (blurry) but nothing helped.

Did anybody have the same problem and a solution for this? I attached some screenshots from PVKeeper which may help to find the issue.

Any hep much appreciated!

 

[Quattrohead]

Your battery voltage seems rather high. Did you backup the old firmware first ? Not sure if that is an option though.

 

[ATOMAN]

no backup of fw and yeah, battery is charged to 100%. I'm already draining it by leaving the Growatt ON but the inverter off. Don't have anything (golf cart) to drain the batteries.

 

[ATOMAN]

Good news, I downgraded the fw to an older one (_202103221352.bin) and all back to normal. Phew!

 

[Salmantino 3000]

tendras la liga donde bajas las versiones de actualizaciòn

 

[archy]

Good news, I downgraded the fw to an older one (_202103221352.bin) and all back to normal. Phew!

Hi. Can you please share where did you find the older firmware version? I would like to downgrade mine but can't find any older version than TMS320F28035_GW510.94_202103221352.
Thank you.