In message , at 13:49:49 on Tue, 20 Dec
2011, Bill Wright remarked:
Anyway what's green about running a bus on batteries? The
overwhelmingly largest part of the electrical energy comes from coal or
gas burnt in a power station. Part of this energy is used to recharge
the bus overnight (they must do this or all the energy needed to move
the bus would come from diesel and they wouldn't be able to pretend
that was green).

If the design results in using half as much diesel, powered entirely by
that diesel (so no over-complication by overnight charging) then that's
a significant "win".
--
Roland Perry