Downhill reloaded

I tested again the same slope.
This time driving in D.

It seems there's still an exponential charging at the beginning (15:13:00 - 15:13:45), and then a linear progression.
Here's the speed graph:

One hypothesis for the change from exponential to linear of the charging progression was battery temperature.

Here's the current flow, charging the battery.
At 15:14:25 there's a sudden break.

At that time, the system began to use hydraulic brakes.
Note that at 15:14:45 brakes were not in use, but Amperes stayed low, even if speed was well in excess of 45km/h.