SMA ModBus fetcher (I am not so creative with names :]) is an open source project written in C/C++ to fetch instantaneous values from SMA Sunny Boy inverters. It works and been tested on Linux.
This program connects over Modbus to your SMA® solar inverter and reads instantaneous power generation data. The collected data is stored in an Influx database.
It has been continuously tested on
- SMA Sunny Boy 3000 with the webconnect module (SB3000TL-21)
- SMA Sunny Boy 4000 with the webconnect module (SB4000TL-21)
For a list of known bugs, consult the issues. If you find a bug, please create an issue.
Refer to the Wiki for documentation and FAQ.
The following is a typical output of the program.
---------------------------
INVERTER - SB4000TL-21
172.19.40.0
---------------------------
Total yield: 39230580Wh
Day yield: 1954Wh
Inverter
Temperature: 30.000000C Heatsink: 0.000000C
DC 1
Volt: 358.760000V
Amp: 0.936000A
Watt: 335W
DC 2
Volt: 220.240000V
Amp: 0.847000A
Watt: 186W
AC
Volt: 233.830000V
Amp: 2.147000A
Watt: 496W
GridFreq: 49.990000
ReactiveP: 0 VAr
ApparentP: 0
These values are then sent to an Influx Database 2.0 using the HTTP line protocol.
INFLUXDB DEBUG: POST /api/v2/write?bucket=solar&org=massimogg&precision=s HTTP/1.1
Host: 172.17.3.0:8086
User-Agent: influxdb-client-cheader
Content-Length: 303
Authorization: Token jj553uNGBo1rHgTuEjb3D-iZhECzs3i99Ubt4S9xAeoccRolxxBGS-rfVXdO2deokw265_FecKYMif-Fwu4NFA==
measurement,inverter=SB4000TL-21 Condition=307i,Temperature=30.000000,DayYield=1954i,TotalYield=39230580i,Pac1=496i,Pdc1=335i,Pdc2=186i,Uac1=233.830000,Udc1=358.760000,Udc2=220.240000,Iac1=2.147000,Idc1=0.936000,Idc2=0.847000,GridRelay=51i,GridFreq=49.990000,ReactivePower=0i,ApparentPower=0i 1716631685
see docker-compose.yml and Dockerfile file.
- INFLUX_HOST=influxdb
- INFLUX_PORT=8086
- INFLUX_ORGANISATION=
- INFLUX_BUCKET=solar
- INFLUX_TOKEN=
- INTERVAL=15
- DEBUG=1
make and ./main
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