Hi everyone,
Today I updated the SMLIGHT SLZB-MR4U Home Assistant coordinator
to firmware: core: v3.3.3.dev7 / zigbee: 20260416.
THEN restarted Home Assistant.
?? Result: Vitocharge sensor entities are no longer available. ??
"Entity is currently unavailable: sensor.e3_vitocharge_03_pv_Leistung..." etc.
I don't know if this is directly related to the update.
BUT
ALL heating entities are still there – VScotHO1 72
I "restarted" Home Assistant >> no change
I "reloaded" ViCare >> no change
This forum is English only. Please translate your post.
OK - thanks. Thought I was in German group. 
This is a dev version... It says so in the name.
Search this forum, there are other posts about this and the manufacturer posting dev versions on the release channnel. Tips on Searching for Answers & Duplicate Topics in the Forum
I think that's nothing to do with Viessmann ViCare. 
You could be right, but you are the one that stated you upgraded the controller to a dev firmware version then another thing broke.
I am following your lead here.
SLZB-06 'Failed setup' after update to v3.3.3.dev7, all Zigbee devices non-functioning!.