Earlier quoted context omitted.
Taxis, city buses, UPS trucks, etc, all tend to be busy during the day. They get charged overnight, when grid demand is lower, and take advantage of low off-peak electricity prices. The idea that these things place a “huge strain on the grid” as the poster above suggests just sounds like more made up FUD.
No, the poster above is right. There was an article about this a month ago or so. Anyways, the TLDR is that vehicles need to charge more often than just nightly and not just at the main depot. Transit agencies need to build heavy duty fast charging infrastructure scattered across many locations in the city. This has been so far a large upfront cost which holds transit EV expansion at bay.
The examples I mentioned are from London, which has a growing fleet of hundreds of heavy electric vehicles (city buses, UPS trucks, etc). All of these charge exclusively overnight.