Mine on a 180l horizon cylinder waaay worse , performs far more consistently.
But I bet those dT’s are way too wide and that is the issue.

Mijn richtwaarde is continue bij 7 graden of lager.
Hier illustratie in de top toolbox van Stiebel www.stiebel-eltron.nl/toolbox/prod...

Build one this week based on OEM install (peaks due to unmodelled dhw) rest good

Wanneer er hoge stroomprijzen zijn op LI

Helloooo it's meeeeee