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

Hardware
,
61

Indeed. I have other issues without out of date software. I am resolving these first.

Thanks

1 Like
62

Thank all, Python3 was the issue and I had to reinstall the missing modules, namely:

pip install toml twisted pymodbus

The script now runs but it sits at:

pi@emonpi:~/PowerScraper $ ./power_scraper.py
Setting up EmonCMS

Thanks for any help, Iā€™m a newbie to this.

1 Like
63

Iā€™ve just noticed at the top of the file

Iā€™ve created a PR to change the instructions to pip3!

I presume you have created the config.toml and put in your Emoncms details?

Also I think you need to add in the IP of your inverter(s) to the config.

[edit]
I think it should be

inverters = ['5.8.8.8']

based on the URL that worked for you.

64

Suddenly noticed, I hope you did (although, TBH, I do not understand the difference between pip & pip3 and the relationship to Python 2 & 3).

pip3 install toml twisted pymodbus
65

Hi @borpin

inverters = ['5.8.8.8']

based on the URL that worked for you.

Yes, this is the IP I have entered in the config file.

Suddenly noticed, I hope you did (although, TBH, I do not understand the difference between pip & pip3 and the relationship to Python 2 & 3).

pip3 install toml twisted pymodbus

Yes, I did this too. The script didnā€™t like run until I did this.

I think it is getting past communicating with the inverter and trying to communicate with EmonCMS. I can access EmonCMS without issue and all looks good in there.

66

Have you used the right API key?

What version of emoncms?

Can you click on the button ā€˜copy as markdownā€™ next to ā€˜Server Informationā€™ and paste here (no further formatting required)

67

Iā€™ve checked the API key is correct.

Server Information

Server Information

Services

  • emonhub :- Failed Failed
  • emoncms_mqtt :- Active Running
  • feedwriter :- Active Running - sleep 300s 0 feed points pending write
  • service-runner :- Activating Auto-restart
  • emonPiLCD :- Activating Auto-restart
  • redis-server :- Active Running
  • mosquitto :- Active Running
  • demandshaper :- Active Running

Emoncms

Server

  • OS :- Linux 4.19.75-v7+
  • Host :- emonpi | emonpi | (192.168.0.100)
  • Date :- 2019-11-29 18:03:09 UTC
  • Uptime :- 18:03:09 up 4:49, 2 users, load average: 0.01, 0.02, 0.00

Memory

  • RAM :- Used: 18.53%
    • Total :- 926.08 MB
    • Used :- 171.57 MB
    • Free :- 754.51 MB
  • Swap :- Used: 0.00%
    • Total :- 100 MB
    • Used :- 0 B
    • Free :- 100 MB
      Write Load Period

Disk

  • / :- Used: 53.01%
    • Total :- 3.92 GB
    • Used :- 2.08 GB
    • Free :- 1.65 GB
    • Write Load :- 349.53 B/s (4 hours 47 mins)
  • /var/opt/emoncms :- Used: 0.04%
    • Total :- 9.98 GB
    • Used :- 3.77 MB
    • Free :- 9.47 GB
    • Write Load :- 0 B/s (4 hours 47 mins)
  • /boot :- Used: 20.55%
    • Total :- 252.05 MB
    • Used :- 51.79 MB
    • Free :- 200.25 MB
    • Write Load :- 0 B/s (4 hours 47 mins)
  • /var/log :- Used: 9.09%
    • Total :- 50 MB
    • Used :- 4.54 MB
    • Free :- 45.46 MB
    • Write Load :- n/a

HTTP

  • Server :- Apache/2.4.38 (Raspbian) HTTP/1.1 CGI/1.1 80

MySQL

  • Version :- 5.5.5-10.3.17-MariaDB-0+deb10u1
  • Host :- localhost:6379 (127.0.0.1)
  • Date :- 2019-11-29 18:03:08 (UTC 00:00ā€Œā€‹)
  • Stats :- Uptime: 17388 Threads: 13 Questions: 2063 Slow queries: 0 Opens: 46 Flush tables: 1 Open tables: 40 Queries per second avg: 0.118

Redis

  • Version :-
    • Redis Server :- 5.0.3
    • PHP Redis :- 5.0.2
  • Host :- localhost:6379
  • Size :- 24 keys (761.66K)
  • Uptime :- 0 days

MQTT Server

  • Version :- Mosquitto 1.5.7
  • Host :- localhost:1883 (127.0.0.1)

PHP

  • Version :- 7.3.11-1~deb10u1 (Zend Version 3.3.11)
  • Modules :- apache2handler | calendar v7.3.11-1~deb10u1 | Core v7.3.11-1~deb10u1 | ctype v7.3.11-1~deb10u1 | curl v7.3.11-1~deb10u1 | date v7.3.11-1~deb10u1 | dom v20031129 | exif v7.3.11-1~deb10u1 | fileinfo v7.3.11-1~deb10u1 | filter v7.3.11-1~deb10u1 | ftp v7.3.11-1~deb10u1 | gd v7.3.11-1~deb10u1 | gettext v7.3.11-1~deb10u1 | hash v7.3.11-1~deb10u1 | iconv v7.3.11-1~deb10u1 | json v1.7.0 | libxml v7.3.11-1~deb10u1 | mbstring v7.3.11-1~deb10u1 | mosquitto v0.4.0 | mysqli v7.3.11-1~deb10u1 | mysqlnd vmysqlnd 5.0.12-dev - 20150407 - $Id: 7cc7cc96e675f6d72e5cf0f267f48e167c2abb23 $ | openssl v7.3.11-1~deb10u1 | pcre v7.3.11-1~deb10u1 | PDO v7.3.11-1~deb10u1 | pdo_mysql v7.3.11-1~deb10u1 | Phar v7.3.11-1~deb10u1 | posix v7.3.11-1~deb10u1 | readline v7.3.11-1~deb10u1 | redis v5.0.2 | Reflection v7.3.11-1~deb10u1 | session v7.3.11-1~deb10u1 | shmop v7.3.11-1~deb10u1 | SimpleXML v7.3.11-1~deb10u1 | sockets v7.3.11-1~deb10u1 | sodium v7.3.11-1~deb10u1 | SPL v7.3.11-1~deb10u1 | standard v7.3.11-1~deb10u1 | sysvmsg v7.3.11-1~deb10u1 | sysvsem v7.3.11-1~deb10u1 | sysvshm v7.3.11-1~deb10u1 | tokenizer v7.3.11-1~deb10u1 | wddx v7.3.11-1~deb10u1 | xml v7.3.11-1~deb10u1 | xmlreader v7.3.11-1~deb10u1 | xmlwriter v7.3.11-1~deb10u1 | xsl v7.3.11-1~deb10u1 | Zend OPcache v7.3.11-1~deb10u1 | zlib v7.3.11-1~deb10u1

Pi

  • Model :- Raspberry Pi 2 Model B Rev 1.1 - 1GB (Embest)

  • Serial num. :- A2FBF6F

  • Temperature :- 29.86Ā°C - 30.4Ā°C

  • emonpiRelease :- emonSD-17Oct19

  • File-system :- read-write

Client Information

Client Information

HTTP

  • Browser :- Mozilla/5.0 (Linux; Android 9; SM-G975F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Mobile Safari/537.36
  • Language :- en-US,en;q=0.9,en-GB;q=0.8

Window

  • Size :- 412 x 771

Screen

  • Resolution :- 412 x 869
68

Depends on whether or not oneā€™s system has both Python2 and Python3 installed. Viz:

IF python3 is your only python and python3 and python can both start it, then there is no difference. If python starts legacy python and python3 starts, well, python 3 then pip will install for legacy python and pip3 or your python3 example will install for python 3.

Ref: What's the difference between pip and pip3?

1 Like
69

Would anyone be willing to help me get Modbus working with an FTDI adapter?! Iā€™ve tried modifying the Powerscraper script (with my very basic Python skills) to use serial like the SDM630ModbusV2 but I get the following error and for the life of me I cannot work it out:

pi@emonpi:~/PowerScraper_custom $ ./power_scraper.py
Setting up EmonCMS
Traceback (most recent call last):
  File "./power_scraper.py", line 106, in <module>
    config['Solax-Modbus']['stopbits'], config['Solax-Modbus']['timeout'])
TypeError: __init__() takes 3 positional arguments but 6 were given

This is the section of code I have changed:

if 'Solax-Modbus' in config:
    SolaxModbusInverters = []
    for inverter in config['Solax-Modbus']['ports']:
        modbusInverter = SolaxModbus(inverter, config['Solax-Modbus']['baud'], config['Solax-Modbus']['parity'],
                    config['Solax-Modbus']['stopbits'], config['Solax-Modbus']['timeout'])
        SolaxModbusInverters.append(modbusInverter)
    looperSolaxModbus = task.LoopingCall(inputActions, SolaxModbusInverters)
    looperSolaxModbus.start(config['Solax-Modbus']['poll_period'])

Any help will be greatly appreciated. Let me know if you need more info.

Thanks

Max

70

Youā€™ll also need to update Inputs/SolaxModbus.py to do something with the new serial arguments youā€™re passing

71

Thatā€™s your main clue.
You supplied six arguments, but the function only wants three.

72

Ah okay. The error confused me to think the issue was within power_scraper.py but I need to update SolaxModbus.py!

Thanks, Iā€™ll keep playing.

73

@Wulfee do you have an example code of how you are controlling your battery to prevent it discharging when charging your car.

I am trying to do the same through Home Assistant. I have got it reading all the Solar data, but struggling with writing commands to the inverter.

74

I just run a script from a cron job at 00:30 (when my cheap rate starts) to disable and then another at 04:30 (when my cheap rate ends) to re-enable. Iā€™ll post the scripts this evening when I get home.

75

Hi, Iā€™ve been trying to get PowerScraper script to work. Iā€™m having a few issues which I think are to do with trying to use a new version of pymodbus. However, when downgrading to pymodbus==1.5.1 Iā€™m still having the issue:

pi@emonpi:/opt/PowerScraper $ ./power_scraper.py 
Traceback (most recent call last):
  File "./power_scraper.py", line 38, in <module>
    from Inputs.SolaxModbus import SolaxModbus
  File "/opt/PowerScraper/Inputs/SolaxModbus.py", line 1
    from pymodbus.client.async import ModbusClientProtocol, ModbusClientFactory

Can anyone confirm what version of pymodbus works with PowerScraper?

76

Thanks for the response @Wulfee

Are you on the Octopus Go tariff?

Have you had any luck getting grid charging working?
Out of curiosity which version of the Solax Inverter do you have? I have an X1-Hybrid Gen3

77

Yes, itā€™s the best tariff for EV owners, especially if you have solar too.

I did get it to work but wasnā€™t exactly sure what I did as it didnā€™t seem to do what I expected. I stopped fiddling with it for now because I canā€™t charge from the grid anyway without getting a different generation meter as otherwise the grid charged power will appear as generation when in fact it isnā€™t.

I have a generation 2 X hybrid.

Iā€™ve placed my scripts in bitbucket here. Your password may be different as you donā€™t have the same model as me.

Do you have the higher voltage batteries or 48 volt ones?

78

Thanks.

I was going to use Octopus GO. But I have found I hardly need to charge from home as we have free charging at work. So I am just on the normal Octopus Tariff.

I think the only thing I have been doing wrong is using the installer password and not the user password.
I saw the option to change the user password from the default of 2014 in the webportal on the cloud.

Why I didnā€™t try 2014 I donā€™t know?

Will give it another go tonight after work.

I am using a single SolaX Gen2 Triple Power HV 4.5kWh I would like to add a second at a later stage. They are about 100v each.

79

I have got partial battery control working in Home Assistant now. @Wulfee thanks for pointing the obvious out with the password.

I can prevent the battery from discharging when I charge my car. I can also prevent the battery from charging from Solar.
Still canā€™t get grid charging to work yet.

If anyone is interested https://github.com/wills106/homeassistant-config/blob/master/packages/solax.yaml

80

in the SolaxModbus.py change the topline to

from pymodbus.factory import ClientDecoder
from pymodbus.client.asynchronous.twisted import ModbusClientProtocol
from pymodbus.framer.rtu_framer import ModbusRtuFramer
from twisted.internet import defer, reactor, protocol
from twisted.web.client import Agent, readBody