Micro PV System
A few weeks ago I bought myself a micro PV system. It consists of two 275W panels and a matching micro inverter (EVT560). The panels are attached to a small stone wall on our terrace and are fed directly into the house grid for personal use.
The interesting thing is of course to know how much electricity is produced. That’s why I have routed the feed via a Sonoff POW to record the power every 30 seconds.
The right socket is used for feeding in, then goes into the Sonoff and from there into the left socket.
The Sonoff is flashed with the current Tasmota firmware and integrated into openHAB via MQTT. Grafana shows the current performance as a graphic.
Two topics are still open:
- Recording the used kWh .
- Currently a phase is being fed in. But my house electrics uses 3 phases. This means that I could always switch the solar system to the phase with the highest load in order to have the greatest benefit.
If someone has a complete set of rules, items etc. and other hints on the topic, I would be happy. 