my-PV AC ELWA 2

Supported devices: AC ELWA 2; AC•THOR range; HEA•THOR IoT; SOL•THOR. Limitations: The water heater entity only supports hot water heating. Other operating modes of my-PV devices, such as room heating, are not available as a water heater. Entities are created when the integration is set up. If you change the configuration of the device, for example by connecting an extra temperature sensor, reload the integration to update the entities. The IP address or hostname cannot be changed through the UI. If the device is discovered on a new IP address, Home Assistant updates it automatically. …

Excerpt saved from home-assistant.io on 2026-10-23.

Hi @dneprojects, After updating the firmware on the my-PV AC ELWA 2, trying to set up or re-authenticate the custom integration triggers a Home Assistant password prompt ("myPV-Authentifizierung: Das Gerät AC ELWA 2 unter der IP ... benötigt ein Passwort..."). However, the local web interface of the AC ELWA 2 does not feature any password configuration or authentication field for local HTTP API access. Entering the Device Key or leaving it blank results in a setup error/loop. Could you please check if the latest firmware response from the AC ELWA 2 (e.g. changes in data.jsn or HTTP status …

Excerpt saved from GitHub on 2026-10-23.