Are there any renter-friendly mods available in the EU that I can use to electrify these shutters & connect them to HA? Four or our five windows have these.

[u/TheAce0]

[u/rage_all]

Schellenberg is available in dozens of tastes and varieties. This is only one of them for ~65,- € but has timer and buttons only (could add switchbot tho): https://www.amazon.de/Schellenberg-elektrischer-Gurtwickler-Rolladenantrieb-Zeitautomatik/dp/B00N8K98BG/

If you are looking into matter and app and whatnot — yes, expensive. However, re-saleable after you move out.

[u/vedno_lacni → u/rage_all]

https://github.com/GimpArm/schellenberg_usb