tony sayer wrote:
Tony Sayer

The ancilliaries all have their own electric motors. They only run
to the level actually needed.
This is old hat. You can buy this stuff now.

And that power comes from where?...
--
Tony Sayer

The alternator of course. But far less total power is needed then
running it purely mechanically. And if the power from exhaust gases
proves viable, it will come from there.

Wow!, a gas turbine genset;!...

VW have a genny operated from the waste exhaust heat.