"lew hartswick" wrote in message
...
Ed Huntress wrote:
But IC engines are, at best, around 28% efficient. Fuel cells for cars
are around 90% efficient. For stationary applications it's even higher.

Ed Huntress
That is for the fuel cell. Then you have to get the electricity
to the wheels in some fashion. At what "overall" eficiency?
...lew...

Electric motors of that size also run around 90% efficient. After that, the
electric drives have far less driveline complexity and thus much lower
friction losses.

Overall efficiency, from energy capacity of fuel to drive at the wheels,
supposedly is something like 4 - 6 times better with all-electric systems of
good design.

--
Ed Huntress