Probably because you charged to 100% so there is no where for the regen energy to be stored.

 

What about say during winter after the car has been sitting for the day? For reference I drive 33 miles each direction and only charge at home

 

Leave it to Voldar to make my Friday night..... "inexistent"... file that one away!

 

This is how we enrich our vocabulary.

 

cromulent Makes me really appreciate the google word lookup. It's cromulent use of the function.
Anyone back to the subject?

 

All that was to say was already said. The greyed out regeneration means :

• your battery is 100% SOC
• your battery is so cold that the cells are unable to receive any energy back into them. And I mean -15 to -20 C battery temperature (not the weather outside temperature).