Bosswerk Inverter Statistics

This is my small framework to fetch, store and display data from my Bosswerk inverter without a connection to the cloud.

This framework works in my home setup with a Bosswerk MI-600.

How it works

1. The script fetches the status.html from the inverter and converts the inline JavaScript variables to JSON.
2. The current power value is written into a rrd for graphing purposes.
3. The script generates svg graphs for different timespans.
4. The www subdirectory can be published to access the index page with current and historical data.

Dependencies

• bash
• curl
• rrdtool

Usage

1. Do not run this script as root, create a separate user for it.

useradd -m solar
sudo -i -u solar

2. Clone the repo

git clone https://github.com/jcorporation/bosswerk.git

3. Add the http uri to fetch data from

cd bosswerk
echo "PV_URI=\"http://10.10.100.254/status.html\"" > .config

4. Add a .netrc file for authentication (user home)

cat > ~/.netrc << EOL
machine 10.10.100.254
login admin
password admin

EOL

5. Test the script

./solar.sh

After the first run, there should be following new files:

• rrd/solar.rrd: the rrd file with historical data
• www/data/data.json: the json data file
• www/graphs/last_*.svg: the svg graphs of historical data

6. Add a crontab entry

Run the script only at daytime every 5 minutes. The rrdfile expects one datapoint each 5 minutes.

*/5 6-20 * * *	/home/solar/bosswerk/solar.sh 2>&1 | logger -p local1.info

7. Publish

Publish the www directory via nginx:

location /bosswerk {
  alias /home/solar/bosswerk/www;
}