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For Deye 8k US this is the latest one. MCU1-SG-Ver0000-C372-CK.bin MCU2_5227US_NC_NR8K59V.bin When a new firmware is release Deye remove the old one from the server.

Yes, that number is the MCU2 HW Reversion.

Lastest firmware deye 8KUS is 5221 for the mcu2

For Deye 8KUS curent lasted version

I use MCU2_6027US_NC_NR8K59V on SUN-8K-SG01LP1-US and in comparison with MCU2_5227US_NC_NR8K59V.bin Apparently the 2 programs are equivalent, both work fine on the inverter, the changes seen are the default configurations. The 6027 will setup the EU Grid standar as default and the 5227 will...

SUN-8K-SG01LP1-US

I found on other forum this firmware name. MCU2_6027US_NC_NR8K59V.bin And i remember that in a few years ago the number of firmware for 8KUS was 5.9.8.2. Then change to 5.2.1.4 . And after that change, the solar panel capacity display on the screen change from 12K to 8K.

Seems that the new update for 8KUS is release. MCU1-SG-Ver0000-C370-CK.bin MCU2_5227US_NC_NR8K59V.bin

Current SW Version for Deye 8K US

I read in some place that this also happen if you install a incorrect firmware on the inverter like installing the 3 phase firmware in a single phase inverter.