This repository has been started because the Firmware prior to MW3_16U_5406_1.53 had some significant security issues - See also Thread on Photovoltaikforum (German) or Article on Heise (German)

Additionally to that there is a pretty steady pace on firmware releases but sadly no public changelog is available. As the Server was also down for a few days earlier in 2023 I've decided to start this repository to keep the firmware versions somehow online even if the server would face issues.

I don't take any responsibility for any damage caused by this firmware. Use at your own risk. It worked on my inverter, but I can't guarantee it will work on yours.

If you brick your device that's your problem. ;)

Installed on a Deye SUN600G3-EU-230 and it worked fine (5406 in the filename).

My feeling is that the firmware files and IP info can be released out into the wild as it's not hidden and the fact that there is specifically no HTTPS connection used would suggest that the manufacturer does not care about securing those files.

The IP of the firmware update server is 47.254.36.66. It looks like behind this IP is the firmware update Server of Deye. At least I got greeted with an Nginx default page via HTTP.

Based on a few forum entries and the answer from Deyes support the Inverters should auto-update to the latest version when being up and running for 30 minutes.

# Deye
http:https://47.254.36.66/0_D0002_18/MW3_15U_5406_1.471.bin
http:https://47.254.36.66/0_D0002_18/MW3_15U_5406_1.49R.bin
http:https://47.254.36.66/0_D0002_18/MW3_16U_5406_1.53.bin
http:https://47.254.36.66/0_D0002_18/MW3_16U_5406_1.56.bin
http:https://47.254.36.66/0_D0002_18/MW3_16U_5406_1.57.bin
http:https://47.254.36.66/0_D0002_18/MW3_16U_5406_2.04.bin
http:https://47.254.36.66/0_D0002_18/MW3_16U_5406_2.06.bin
http:https://47.254.36.66/0_D0002_18/MW3_16U_5406_2.30.bin
http:https://47.254.36.66/0_D0002_18/MW3_16U_5406_2.31.bin

# Solis Ginglong
http:https://47.254.36.66/0_D0002_18/MW3_15_0501_1.21.bin
http:https://47.254.36.66/0_D0002_18/MW3_15_0501_1.23.bin

# Deye Hybrid Inverters
http:https://47.254.36.66/0_5407_1/MCU1-SG-Ver0000-C362-CK.bin

You can use the DIGEST files to verify that those files here are the same as the ones on the server.

shasum -c MW3_15U_5406_1.471.bin.DIGEST
shasum -c MW3_16U_5406_1.53.bin.DIGEST

or verify all DIGEST files

for filename in *.bin.DIGEST; do
    shasum -a 256 -c $filename
done

Create your own DIGEST files

for filename in *.bin; do
    # create a file called $filename.DIGEST
    shasum -a 256 $filename > $filename.DIGEST
done

• Deye Microinverter - Cloud-free
• Deye solar inverter MQTT bridge
• deye-logger-at-cmd This one has a lot of useful insights into resetting passwords AT+WEBU or Modbus access.
• Solarman integration - Homeassistant
• And more Repositories tagged with deye

If you have more information or insights into the firmware update process, alternative URLs or other information let me know.

Deye also stores the firmware for their hybrid inverters on the same server. So far the http:https://47.254.36.66/0_5407_1/ directory has been identified, but there may be others. The firmware located here has been confirmed to work on the SUN-3K-SG04LP1-AU-24V and SUN-5K-SG04LP1-AU, however based on naming conventions, it seems like this same firmware is used across a lot of the hybrid inverter models and regions.

There are two types of firmware files in there, one for the HMI (display) and the other for the main firmware. Examples: Main: SG_5K_MCU2_V3384-NR.bin HMI: MCU1-SG-Ver0000-C366-CK.bin

Based on information in this forum thread: https://powerforum.co.za/topic/12655-deye-inverter-latest-firmware/ It is recomended to update the HMI first, followed by the Main firmware. Generally the HMI firmware update doesn't result in the inverter shutting down the outputs, but the Main firmware normally does.

The update process is fairly straightforward. Deye's instructions can be found here: hybrid-inverter-info/LOCAL UPDATE INSTRUCTIONS.pdf The default login and password for the solarman dongle is admin/admin. I found that one of my inverters needed to be power cycled before it would accept the new firmware. And sometime the firmware upload would start again after the initial upload unless I unplugged the solarman dongle.

C362 - C369

• Added Language 'Polish'
• 'Low Power Mode<Low Batt' moved from 'Batt Mode' screen to 'Func Set4' screen
• 'Low Noise Mode' moved from 'Batt Set2' screen to 'Func Set4' screen
• 'Grid Side INV Meter2' renamed to 'Grid Tie Meter2' on 'Paral Set3' Screen
• New setting on 'Func Set4' screen: 'Export Power Limiter' (appears to match the 'Max Sell Power' seting on 'Work Mode1' screen)
• New setting on 'Func Set4' screen: 'Import Power Limiter' (the manual says this limits power from the grid, but has a lower priority than 'Grid Peak Shaving' setting.
• New setting on 'Func Set4' screen: 'MPPT Multi-Point Scanning'
• New setting on 'Port Set1' screen: 'off grid immediately off'
• New setting on 'Port Set1' screen: 'AC couple Frz High'