evcc at the Home Assistant Community Day
Last Saturday, 7 November 2026, was Community Day: Home Assistant users met at local meetups all over the world. Andrej Friesen invited me to the one in Mönchengladbach to talk a little about evcc and how it fits into the Home Assistant ecosystem. I also brought a small model home that people could play with.
The Talk
Section titled “The Talk”A lot of people run evcc and Home Assistant side by side, so I showed how to combine the strengths of both. evcc brings the easy configuration and smart control of EV charging, Home Assistant adds the power of automations and the deep integration into the rest of the home.
- ha-evcc by Matthias Marquardt (marq24) brings evcc data and actions into the Home Assistant universe. You don’t have to write YAML or deal with REST or MQTT yourself.
- hass-evcc-card by mkshb sits on top of ha-evcc and gives you ready-made dashboard cards.
- hassio-addon runs evcc directly inside Home Assistant as an app. Thanks to thecem, goebelmeier, dm82m and everyone else who keeps it running.
It also works the other way around. You can use Home Assistant entities as meters, chargers or heat pumps in evcc. The details are in the docs for the integration and the installation.
Hands-On Model Home
Section titled “Hands-On Model Home”I shared a table with Bastian Nordmeyer from Tinkerforge. They make the WARP4 Charger, an open hardware wallbox that is popular in the evcc community. It is designed and manufactured in Germany, the firmware, schematics and PCB layouts are published on GitHub, and it is built to be repaired and upgraded. Think of it as the Prusa printer philosophy, but for EV chargers.
Since Andrej doesn’t seem to plan his events in summer, we were unable to showcase solar surplus charging with a real solar system 😉 That’s why I built a little model home. The 3D-printed house has two dials, one for solar production and one for the home battery level. Next to it sits a 3D-printed car that shows its charging status with diffused LEDs. All of it is connected to a NanoPi Zero2 running the evcc Linux image, which in turn is integrated with Home Assistant running on a Raspberry Pi next to it.
Remote access was enabled, so people could scan a QR code and control everything from their own phone. Turn up the sun, change the mode and see how it propagates through the systems.
The real WARP4 Charger on our table was also connected. Stefan Mühlen, Elektromeister at the Kreishandwerkerschaft Mönchengladbach and our host for the day, offered to do a real wallbox installation with EV charging next time. Maybe Andrej manages to schedule the next event for summer 😅
Garage Display
Section titled “Garage Display”The star of the show was a pretty new community project by Toby Marks (tobymarks). His evcc garage display shows the status of a charging point on a small 4″ touch display for only around €25. You see your vehicle and how charging is going, and you can change the mode or activate boost right there. Installation happens straight from the browser.
More projects like this are on the community projects page.
People
Section titled “People”I met Dominik Heußen, who showed me his project wabenwatt. It’s a map of aggregated solar production across Germany in real time.
I talked to a lot of evcc users and to people who are planning to buy their first electric car. There were also interesting conversations about how AI is changing the way people interact with their smart home, and also how they set it up. And it was nice to catch up with Thomas Wiebe from the SmartHütte podcast, Tristan Küsters from Tristans Smartes Heim, Flo from Flotomation, Matthias Kleine from haus:automation, Almir Hodzic from Eltako and Richard Polzer, who runs a YouTube channel about KNX.
Thanks
Section titled “Thanks”It was an intense afternoon. Thanks Andrej for the invite! Looking forward to the next one.
