SolarPower

Balkonkraftwerk

My "Balkonkraftwerk" uses OpenDTU to query the rf data of the microinverter TSOL-M800 from TSUN (Hoymiles HM600 compatible).

Monitoring Setup

• http://OpenDTU1 (admin j...1)
• mqtt@job4 (mosquitto_sub -v -t 'OpenDTU1/#')
• job4:/etc/systemd/system/openDtu2Db@OpenDTU1.service (sudo systemctl status openDtu2Db@OpenDTU1.service, sudo journalctl -f -u openDtu2Db@OpenDTU1.service)
  • python -u /home/joachim/bin/openDtu2Db.py OpenDTU1 (prints to stdout)
• Influx database openDtu (influx -database openDtu -precision rfc3339 -execute "select * from string order by time desc limit 10")
• Grafana Source openDtu@InfluxDB
• Grafana Dashboard https://banzhaf.chickenkiller.com/grafana/d/_rNE2oO7k/stromverbrauch?orgId=1&refresh=10s&viewPanel=7
• Dynamic Inverter Limit for my ElectricityMeter firmware
  • To enable dynamic inverter limit the firmware needs mqtt topic OpenDTU1/$serialno/status/limit_dynamic set to 1
  • Make Mosquitto persistent messages persistent over restarts
    • /etc/mosquitto/conf.d/persistence.conf

persistence true
persistence_location /var/lib/mosquitto

Troubleshooting

• Sometimes mqtt connection gets lost (see https://github.com/tbnobody/OpenDTU/issues/965)
  • Symptom: no new data in influx db and Grafana dashboard
  • Fix: Go to http://opendtu1/settings/mqtt, hit "Save".
  • Updated 2023-07-31, check if fixed...

Update

• Online: http://opendtu1/firmware/upgrade
• Offline
  • Download e.g. https://github.com/tbnobody/OpenDTU/releases/download/v23.7.22/opendtu-generic.factory.bin
  • Flash with esptool.py (e.g. from within platformio packages and python of vscode platformio terminal)

python ~/.platformio/packages/tool-esptoolpy@src-3656ef7461ddc68b458b40db7ac51220/esptool.py \
  --port /dev/ttyACM0 --chip esp32 --before default_reset --after hard_reset  write_flash \
  --flash_mode dout --flash_freq 40m --flash_size detect 0x0  ~/Downloads/opendtu-generic.factory.bin

Garagenkraftwerk

My "Garagenkraftwerk" uses Tasmota to query power data and control a fan via Nous power plugs

Monitoring Setup

• Fan http://nous1 (on after 2 min > 250 W, off after 6 min < 150 W by tasmogy.py)
• Power: http//nous2
• mqtt@job4 (mosquitto_sub -v -t '+/nous1/#' -t '+/nous2/#')
• job4:/etc/systemd/system/tasmogy.service (sudo systemctl status tasmogy.service, sudo journalctl -f -u tasmogy.service)
  • See my repo https://github.com/joba-1/Tasmogy
  • python -u /home/joachim/bin/tasmogy.py nous2 nous1 (prints to stdout)
• Influx database energies (influx -database energies -precision rfc3339 -execute "select * from energy order by time desc limit 10")
• Grafana Source energies@InfluxDB
• Grafana Dashboard https://banzhaf.chickenkiller.com/grafana/d/_rNE2oO7k/stromverbrauch?orgId=1&refresh=10s&editPanel=12
• Fan and Solar Plug can be controlled and monitored via Domoticz (using my Tasmoticz Gateway)

LiFePO-Island

My shed in the garden has LiFePO backed island solar power

Monitoring Setup

• Power route: Panel -> Esmart3 -> BMS -> 12V LiFePOs -> Inverter -> 220 V / 500 W continuous power -> 7 manually switchable output plugs and 2 USB ports
• Control/Monitoring: The BMS and the ESmart3 report to an ESP32 via RS485 serial line.
• The ESP32 is behind a Tasmota port forwarding range extender http://nat2, reachable via http://nat2:8080
• The ESP32 runs my firmware https://github.com/joba-1/LiFePO_Island which posts data to influx
• Influx DB (influx --database LiFePO_Island --execute "show measurements" for all available data tables) e.g.:
  • ESmart3 charge and load status: influx -precision rfc3339 --database LiFePO_Island --execute 'select * from ChgSts order by time desc limit 10'
  • BMS cell voltages: influx -precision rfc3339 --database LiFePO_Island --execute 'select * from Cells order by time desc limit 10'
• Grafana Source LiFePO_Island@InfluxDB
• Grafana Dashboard https://banzhaf.chickenkiller.com/grafana/d/mYiP89N4z/lifepo_island?orgId=1
• Load can be switched via Domoticz (Dummy Hardware LiFePO_Island with virtual sensor LiFePO_Island_Load, type switch)
  • Switch script: /opt/domoticz/scripts/lua/script_device_LiFePO_Island_Load.lua
  • Status script: /opt/domoticz/scripts/lua/script_time_LiFePO_Island_Load.lua