On Sat, 10 Dec 2016 11:55:48 +0000, Basil Jet
wrote:

On 2016\12\10 08:21, DRH wrote:
On Friday, 9 December 2016 21:08:01 UTC, Recliner wrote:
DRH wrote:
The Red Arrow BYD / Alexander-Dennis Enviro200EV buses have
iron-phosphate batteries at the rear and in the roof pod, which also
incorporates the aircon unit. The driveline comprises two 90kW wheel-hub
motors and water cooling system plus regenerative braking system.

There are also five BYD double-deck battery buses in (intermittent) use on route 98.

Thanks, that's interesting. Were the additional batteries in the roof pod
added to increase the range? They sound like an afterthought.

No, I think it is to balance the weight. They appear to be split 50/50 with the very back of the bus.

Putting weight on the roof to improve the balance?

Without that counterweight, there would be very little weight on the
front wheels.