Sofar HYD 3600-ES "V5 frame does not contain a valid Modbus RTU frame"

[ssimoe50]

Hello,

I'm facing an issue and difficulties with my recent installation.

• Sofar HYD 3600-ES
• Device information:
  • Device serial number: 239XXXXXXX
  • Firmware version: LSW3_15_270A_1.68
  • Connected through WiFi

Just to be sure I tried to scan and it was in fact detected this model:

$ python3 scanSolarMan.py

{'ipaddress': '192.168.X.Y', 'mac': 'E8FDZZZZZZZZ', 'serial': '239XXXXXXX'}

But when I tried to run the basic example (with the correct IP and serial information of course I got this:

$ python3 basicSyncClientTest.py 

Traceback (most recent call last):
(...)
File "testsSolarman/basicSyncClientTest.py", line 17, in main
    print(modbus.read_input_registers(register_addr=33022, quantity=6))
(...)
raise V5FrameError("V5 frame does not contain a valid Modbus RTU frame")
pysolarmanv5.pysolarmanv5.V5FrameError: V5 frame does not contain a valid Modbus RTU frame

Has anyone seem similar and/or has a solution or workaround for this in particular?

Thanks

[jmccrohan]

Hi,

Can you enable debug logging please so that I can view the sent and receive frames?

Cheers.

[ssimoe50]

Yeah of course @jmccrohan !

Here they go:

2024-07-06 13:13:28,954 - pysolarmanv5.pysolarmanv5 - DEBUG - Socket setup completed... <socket.socket fd=3, family=2, type=1, proto=6, laddr=('192.168.1.82', 52612), raddr=('192.168.1.119', 8899)>
2024-07-06 13:13:28,954 - pysolarmanv5.pysolarmanv5 - DEBUG - SENT: a5 17 00 10 45 3b 00 a2 72 f3 8e 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 04 80 fe 00 06 38 38 37 15
2024-07-06 13:13:40,610 - pysolarmanv5.pysolarmanv5 - DEBUG - RECD: a5 10 00 10 15 3b a1 a2 72 f3 8e 02 01 16 da 4b 00 8c 17 00 00 de 5a 3d 66 05 00 67 15

Traceback (most recent call last):
(...)
File "testsSolarman/basicSyncClientTest.py", line 17, in main
    print(modbus.read_input_registers(register_addr=33022, quantity=6))
(...)
raise V5FrameError("V5 frame does not contain a valid Modbus RTU frame")
pysolarmanv5.pysolarmanv5.V5FrameError: V5 frame does not contain a valid Modbus RTU frame

[githubDante]

This is a modbus exception code (0x05). Try with different address. Quick search for the inverter shows that the total buy/sell from/to grid should be in the range 0x021E (decimal 542) + 4 i.e the request should be:

print(modbus.read_input_registers(register_addr=542, quantity=4))

[ssimoe50]

Hi @githubDante

This is a modbus exception code (0x05). Try with different address. Quick search for the inverter shows that the total buy/sell from/to grid should be in the range 0x021E (decimal 542) + 4 i.e the request should be:

print(modbus.read_input_registers(register_addr=542, quantity=4))

Based on your comment I attempted that example, still faced exactly the same response:

2024-07-06 16:51:52,176 - pysolarmanv5.pysolarmanv5 - DEBUG - Socket setup completed... <socket.socket fd=3, family=2, type=1, proto=6, laddr=('192.168.1.82', 59200), raddr=('192.168.1.119', 8899)>
2024-07-06 16:51:52,176 - pysolarmanv5.pysolarmanv5 - DEBUG - SENT: a5 17 00 10 45 12 00 a2 72 f3 8e 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 04 02 1e 00 04 90 77 45 15
2024-07-06 16:51:54,187 - pysolarmanv5.pysolarmanv5 - DEBUG - RECD: a5 10 00 10 15 12 1f a2 72 f3 8e 02 01 3e 0c 4c 00 e5 06 00 00 dc 5b 3d 66 05 00 5e 15
Traceback (most recent call last):
(...)
  File "testsSolarman/basicSyncClientTest.py", line 27, in main
    print(modbus.read_input_registers(register_addr=542, quantity=4))
(...)
  File "pysolarmanv5/lib/python3.12/site-packages/pysolarmanv5/pysolarmanv5.py", line 256, in _v5_frame_decoder
    raise V5FrameError("V5 frame does not contain a valid Modbus RTU frame")
pysolarmanv5.pysolarmanv5.V5FrameError: V5 frame does not contain a valid Modbus RTU frame

Nevertheless can you please point me where you found that information, or the keywords you used to search for it? So like that I can try read and maybe attempt other values if that's the case.

Thanks!

[githubDante]

Hi @ssimoe50,

Search for sofar hyd 3600-es modbus rtu. The first result which I see points to this PDF. The addresses seems to be used in this repo. It's a different model so the mapping may be different.

Another PDF can be found here

Good luck.

[githubDante]

@ssimoe50 seems to have found the solution for this inverter model. See here for more info