Charging one car at 7kW, put the oven on, jump in the electric shower, and you're there before the heat pump even kicks in. 20kW is the about the maximum input

Charging one car at 7kW, put the oven on, jump in the electric shower, and you're there before the heat pump even kicks in. 20kW is the about the maximum input to a typical UK home (80A or 100A breaker single phase 216-253V). You can draw that fairly easily. But a street of 100 houses is not drawing 20kW to each house at the same time, or 2MW to the street. Standard models put it around 200kW. The substation can be overspecced to 300kW and there's no problem. Convert everyone to electric and that substation needs to be upped far higher. I live on a new build site still under construction. Until a month ago the site was fed from a long cable from a separate substation. The houses have solar and electric car points. The voltage varied dramatically and electric chargers would frequently trip (they do that when voltage goes over I think 247V for safety purposes). https://www.youtube.com/watch?v=-f6TD2OSup4 https://www.youtube.com/watch?v=-f6TD2OSup4 helped me understand what I was seeing. Last month we were moved onto a new substation and haven't have issues since.