I think the issue with bus charging is that if you want to plug in all those busses at their various depots and charge overnight, the electrical infrastructure

I think the issue with bus charging is that if you want to plug in all those busses at their various depots and charge overnight, the electrical infrastructure can’t support the new load (multiple megawatts per depot). Bus depots were never wired for that kind of load. You literally need to build new substations and wires to service a fleet of busses. I think there is probably generation capacity but it might not be deliverable to where it’s needed.