| Any actual detail? A "normal " sodium street lamp is (was) usually 250 W while a "modern" LED lamp is usually 50-70 W, and typically posts are 25-30 meters apart. So, you have (roughly) 200 W "excess" per post, you need 35 lamps to leds replacement to make 7 kW and this would mean 35 posts at 30 meters each = roughly 1 km in length. How many (electric) cars will be parked along this 1 Km stretch of a street?
I would say as much as 200 (once the conversion to electric will be 100%). But even supposing that each lamp post can actually house several 7 kW outlets, enough to cover the 30 m stretch, let's say 6 outlets as each car will take 5 meters along the road 5x6=30, the cable for the single car (or at the most two) parked right in front of the post will be a "normal" length but to get to the farthest ones you will need a 20 m cable, not exactly handy to carry around or to store. And anyway you are now at around 6x7=42 kW of power per post (as opposed to the original 250 W) and - per kilometer, one side of the street only - you are around 35x42= 1470 kW (as opposed to the "current" 35x0.25=8.75 kW. |
On your calculations of how many cars can charge at once, I would keep it simpler and say that a row of parallel parking typical in UK cities, there is one street lamp for every 5 cars. 50 kWh charge overnight, approx 300 km range for every fifth car.
Supposing 100% EV adoption - well, already not everyone drives themselves to work/kids to school in UK cities (where most on-street parking takes place) - but if they do, and have charging at work plus some nearby rapid charging, that should do the trick, assuming a typical commute by road isn't more than 50 km each way. It's certainly in the ballpark.