I've seen posts on this forum which seem to suggest that the use of the brake, going downhill or whatever, during the regeneration mode, adds to the effect and increases the charge in the HV battery.
No, I believe the exact opposite happens, since energy is used up by the brakes, leaving less available for regeneration.
It would be interesting to know, whether Time and/or Speed come into the equation, by that I mean whether going down a hill slower, hence taking longer, makes any difference?
In fact what are the optimum parameters, for extracting maximum charge, from a given regeneration situation?