Solution: Reading Solax SK-SU5000(E) inverters & SDM630V2 Modbus Power Meters

matthewjporter · 2023-07-05T12:22:39.915Z

Circling around to this again as I could not get it working, it was also winter so not much going on but grid charge/discharge here in the UK

Summertime and find my problem still needs resolving

I need to find my emonpi and setup again

TIA for future assistance

matthewjporter · 2023-07-27T15:55:48.825Z

@deece

I am definitely behind the curve here, finally rebuilt my Home Assistant, Firewall, and EmonCMS onto a ProxMox host and got it all up and running

First with the latest Ubuntu LXC template I was getting the following error:

No module named ‘pymodbus.client.asynchronous’

The following solved it:

sudo pip3 install pymodbus==2.2.0rc4

I am able to ping both the hostname and fqdn of my inverters as setup in DNS from my EmonCMS VM but when running the script I get the following and just repeats:

root@ubuntu:/opt/PowerScraper# ./power_scraper.py 
Setting up EmonCMS
Setting up Solax-BatteryControl
Setting up Solax-Modbus
not connected
not connected
err [Failure instance: Traceback: <class 'KeyError'>: 'Total system power'
/usr/local/lib/python3.10/dist-packages/pymodbus/framer/socket_framer.py:181:_process
/usr/local/lib/python3.10/dist-packages/pymodbus/client/asynchronous/twisted/__init__.py:126:_handleResponse
/usr/local/lib/python3.10/dist-packages/twisted/internet/defer.py:696:callback
/usr/local/lib/python3.10/dist-packages/twisted/internet/defer.py:798:_startRunCallbacks
--- <exception caught here> ---
/usr/local/lib/python3.10/dist-packages/twisted/internet/defer.py:892:_runCallbacks
/opt/PowerScraper/Inputs/SolaxModbus.py:199:solaxRegisterCallback
/opt/PowerScraper/./power_scraper.py:61:outputActions
/opt/PowerScraper/Outputs/SolaxBatteryControl.py:102:send
/opt/PowerScraper/Outputs/SolaxBatteryControl.py:23:handleMeterPower

This is my current config:

[Solax-Modbus]
poll_period = 10
timeout = 5
power_budget_avg_samples = 30
installer_password = ****
inverters = ['solax1','solax2']

[Solax-BatteryControl]
source = "solax1"
linked-batteries = true
timezone = "AEDT-10" 

[Solax-BatteryControl.Inverter.solax1]
phase = 1
single-phase-charge-limit = 2500
single-phase-discharge-limit = 2500
max-charge = 2500
max-discharge = 2500
max-power = 5000

[Solax-BatteryControl.Inverter.solax2]
phase = 1
single-phase-charge-limit = 2500
single-phase-discharge-limit = 2500
max-charge = 2500
max-discharge = 2500
max-power = 5000

So I have two issues,
1 - Why can I not connect to the inverter
2 - What am I missing on the “Total system power”

Thanks in advance

matthewjporter · 2023-07-28T12:45:41.959Z

Ok, Seems I am one step forward

the script is updating into EmonCMS and I can see that the battery power input/output is as it should be but no control as I still have one importing whilst the other is exporting

Still getting the following error

Looks like it is trying to set the second inverter to 0w but never changes and it stays exporting

solax2 to discharge at 0.0W
err [Failure instance: Traceback: <class 'KeyError'>: 'Total system power'
/usr/local/lib/python3.10/dist-packages/pymodbus/framer/socket_framer.py:181:_process
/usr/local/lib/python3.10/dist-packages/pymodbus/client/asynchronous/twisted/__init__.py:126:_handleResponse
/usr/local/lib/python3.10/dist-packages/twisted/internet/defer.py:696:callback
/usr/local/lib/python3.10/dist-packages/twisted/internet/defer.py:798:_startRunCallbacks
--- <exception caught here> ---
/usr/local/lib/python3.10/dist-packages/twisted/internet/defer.py:892:_runCallbacks
/opt/PowerScraper/Inputs/SolaxModbus.py:199:solaxRegisterCallback
/opt/PowerScraper/./power_scraper.py:61:outputActions
/opt/PowerScraper/Outputs/SolaxBatteryControl.py:102:send
/opt/PowerScraper/Outputs/SolaxBatteryControl.py:23:handleMeterPower
]

deece · 2023-07-28T12:52:46.733Z

Can you share your config file? (After redacting passwords, etc)

matthewjporter · 2023-07-28T14:01:53.141Z

[Solax-Modbus]
poll_period = 10 # seconds
timeout = 5 # seconds
power_budget_avg_samples = 30 # The maximum number of samples to average power budget over
installer_password = 1234 # The installer password for the inverter (same as used on the front panel), required if you want to use battery control
inverters = ['solax1', 'solax2']

[emoncms]
timeout = 5 # seconds
server = "http://emoncms"
api_key = "MY API KEY"

[Solax-BatteryControl]
source = "solax1" 
linked-batteries = true
timezone = "AEDT-10"

[Solax-BatteryControl.Inverter.solax1]
phase = 1
single-phase-charge-limit = 2500
single-phase-discharge-limit = 2500
max-charge = 2500
max-discharge = 2500
max-power = 4600
#grace-capacity = 50
#grace-power-threshold = 3500 
#grace-charge-power = 500 

[Solax-BatteryControl.Inverter.solax2]
phase = 1
single-phase-charge-limit = 2500
single-phase-discharge-limit = 2500
max-charge = 2500
max-discharge = 2500
max-power = 4600
#grace-capacity = 70
#grace-power-threshold = 3500
#grace-charge-power = 500

# Define the time periods
# Suitable for ActewAGL Time of Use plans in Canberra, Australia
# Peak times are widened in case the time on the meter drifts

[Solax-BatteryControl.Period.MorningPeak]
start = "4:30:00"
end = "00:30:00" 
min-charge = 20 
grid-charge = false 
#force-discharge = 2500

[Solax-BatteryControl.Period.Offpeak]
start = "00:30:00"
end = "4:30:00"
min-charge = 70
grid-charge = true
#grace = false

Ultimately, I just want between the time of 04:30:00 and 00:30:00 to be able to stop the batteries from charging each other and balance themselves to either charge/discharge

The time period 00:30 - 04:30 is when my off peak/cheap rate and already force charge the batteries via Home Assistant and manage the charge capacity via an automation as I have two different size battery stacks

At all other times between 04:300 and 00:30 I just want to stop the two inverters from fighting with each other and the batteries from swapping charge from one to another and balance out

I only have on “source” setup under battery control and this is the inverter with the main CT clapm, should I put both in there? - will test so long

matthewjporter · 2023-07-28T14:04:59.953Z

matthewjporter:

I only have on “source” setup under battery control and this is the inverter with the main CT clapm, should I put both in there? - will test so long

Well, That fixed the ‘Total system power’ error

Now to monitor

matthewjporter · 2023-07-28T14:50:19.839Z

Batteries still fighting with each other

borpin · 2023-07-28T20:40:59.175Z

matthewjporter:

sudo pip3 install

You should not use sudo with pip3. It can cause unexpected issues.

borpin · 2023-10-09T10:13:02.955Z

A post was split to a new topic: Solax Hybrid Gen 2 (SK-SU5000E) export control not working

Jan · 2023-12-08T18:02:10.131Z

Hi deece.

I am new here to learn how to get data from my Solax Su-5000 via modbus. This works, however, the connection is very unstable and I was thinking about a firmware update. Unfortunately I do not find a version to download.

Can you share Solax_SI_CH_2nd_20160912_DE02 with me?

Greetings from Germany,

Jan

Pukka · 2024-05-27T16:37:44.202Z

Just replying to an old thread, Thanks to @deece my setup has been working ok for a few years now.

I did try a new emonpi image but could not get the dependences correct. is they any plans on updating the code to support newer version?

Also to report the EPROM as not died yet!

deece · 2024-05-29T05:54:29.264Z

Huh, I thought I had added a requirements.txt, but it looks like I missed it.

The troublesome one you want is:
pymodbus==2.5.3

robb01 · 2024-10-20T10:46:16.482Z

Also returning to this old thread. I have it working for my SK-SU5000 and only with the intention of writing realtime data from the inverter into InfluxDB on HA.
The data shows in Influxdb but there are no entity_ids created for the data values so by default it gives me a query like:

SELECT mean("Battery Power") AS "mean_Battery Power" FROM "powersNtemps"."autogen"."solax" WHERE time > :dashboardTime: AND time < :upperDashboardTime: GROUP BY time(:interval:) FILL(null)

instead one that should look like

SELECT mean("value") AS "mean_value" FROM "powersNtemps"."autogen" WHERE time > :dashboardTime: AND time < :upperDashboardTime: AND "entity_id"='Battery Power' GROUP BY time(:interval:) FILL(null)

Consequently the influxdb data doesn’t come across to Home Assistant as entities. Unfortunately this is beyond my python skills to navigate.

image784×173 15.1 KB

Any tips on how to fix this?
TIA.

Pukka · 2024-11-16T17:14:54.317Z

Any pointers on this error. I have just loaded the latest EmonPI image.

I can run ./powershaper.py

I have installed the service, but when I try to start i get this error


pi@emonpi:~/PowerScraper $ sudo systemctl status PowerScraper.service
× PowerScraper.service - Power Scraper
     Loaded: loaded (/etc/systemd/system/PowerScraper.service; enabled; preset: enabled)
     Active: failed (Result: exit-code) since Sat 2024-11-16 17:10:59 GMT; 3s ago
   Duration: 9ms
    Process: 2503 ExecStart=/usr/local/PowerScraper/power_scraper.py (code=exited, status=203/EXEC)
   Main PID: 2503 (code=exited, status=203/EXEC)
        CPU: 2ms

Nov 16 17:10:59 emonpi systemd[1]: Started PowerScraper.service - Power Scraper.
Nov 16 17:10:59 emonpi systemd[1]: PowerScraper.service: Main process exited, code=exited, status=203/EXEC
Nov 16 17:10:59 emonpi systemd[1]: PowerScraper.service: Failed with result 'exit-code'.

deece · 2024-11-16T22:17:35.631Z

Does /usr/local/PowerScraper/power_scraper.py exist and is executable?

Pukka · 2024-11-17T08:31:51.051Z

Thats the fault

It was in /home/pi/PowerScraper.

Whats strange is it was in the home folder on the old image and it worked.

borpin · 2024-11-17T10:30:10.399Z

Try looking at the system logs -

In one window run;

journalctl -f

And restart the service in a different window.

Pukka:

power_scraper.py

Does this run from the command line? Are all dependencies installed?

Pukka · 2024-11-17T16:33:40.904Z

Hi @borpin

Yes I can load it manually without any errors. the problem is where I stored the program.

Veance · 2024-12-05T09:48:21.048Z

Yes I Did

I bricked my SK-SU5000E during Firmware upgrade process …
I could only send the manager firmware with the software found here, the inverter asked me on the screen to reboot, So I did, and now it’s bricked with 2 black lines, no response via Ethernet.
I can only connect by Wifi, It shows “Inverter type: X3_20K_30K” instead of “Inverter type: Hybrid_2th”. (Wrong firmware surely)
I can access the system page, and could send a firmware package, but can’t find one on the net.
Ver: Solax_SI_CH_2nd_20160912_DE02
Idem via the JTAG port, which firmware should I push @deece
Help !

Thanks,

Regards,

–
Veance

deece · 2024-12-05T10:12:24.256Z

Pm me your email address, and I’ll see what I can do