MARSTEK VENUS E 5.12kWh. Got it in August 25 for 1050,00 EUR. It is awesome how open it is designed, I was able to activate and automate it without adding it to my local network (wifi) or using the Marstek App even once. I wrote a blog post here [1].

[1]: https://du.nkel.dev/blog/2026-01-11_marstek-battery-homeassi...

5 kWh for 1k€! Wow! Thanks for sharing

Edit: and thanks for the writeup. This is exactly what I was looking for