(03 Sep 2022, 9:48 pm)Adrian wrote 240V are great, but I imagine are a nightmare to maintain in a bus fleet. No matter how many stickers you put on them to say laptops and phones only, you'll inevitably get someone plugging their straighteners or something in and trip the circuit until it's reset again. At least on trains, the train manager generally has the ability to reset it in each coach.
I'm not sure what size inverter they have running them, but I'm guessing it's not very big. I know the old StreetDecks are not very happy with a 150W laptop being plugged in since it kept cutting out when I tried.
I think they're also using a relatively cheap inverter as I've noticed some chargers make a terrible buzzing noise and get quite warm when I use them