I'm not really sure there is any place for a discussion - you would need a whole new infrastructure for hydrogen powered buses, while keeping a lot of the downsides of fossil fueled air breathing vehicles (eq. air filters filters regardless of if you burn the hydrogen or use it in fuel cells).
With battery buses - you might need to slightly beef up the local transformer and installs some new wires and that's it.
Or even better, do what the city mass transit company does here in Brno, Czech Republic - get trolley busses with batteries, that charge from the overhead wires while on the way, so they can then continue to serve additional destinations past the terminus of road electrification.
It is also super handy for any road work, they just automatically stow their collectors and then once again under wires, deploy them. There is usually a small trough around the wires at this spot, guiding the 2 collectors to the 2 wires. As a result, the driver does not have to leave the vehicles when connecting or disconnecting from wired power.
And it looks super cool! :)
With battery buses - you might need to slightly beef up the local transformer and installs some new wires and that's it.
Or even better, do what the city mass transit company does here in Brno, Czech Republic - get trolley busses with batteries, that charge from the overhead wires while on the way, so they can then continue to serve additional destinations past the terminus of road electrification.
It is also super handy for any road work, they just automatically stow their collectors and then once again under wires, deploy them. There is usually a small trough around the wires at this spot, guiding the 2 collectors to the 2 wires. As a result, the driver does not have to leave the vehicles when connecting or disconnecting from wired power.
And it looks super cool! :)