Decreasing charging time might not be as helpful as you think. Lets say a car can be fully charged in 30 minutes: So the driver shows up somewhere and parks in one of the EV charging spaces and plugs in his or her car. They are not going to hang around for 30 minutes so they connect the car and go about their business. When they get back 3 hours later...
This is still a problem if you can charge in 5 minutes.
Not really a problem. Putting chargers in every space in a car park is pretty cheap, they are basically just circuit breakers or even just ordinary domestic style sockets.
Throw in a few fast ones for the people who need them and you are sorted. The fast chargers can be multi-head too, so even if someone finishes charging and doesn't come back someone else can still use it. Most rapid chargers are like that.
Also, if it's still a problem with a five minute charge, why doesn't it affect petrol pumps?
Charging a car requires a nontrivial amount of electricity, so it's not sufficient to add a circuit breaker / socket, you also need a payment infrastructure unless e.g. the municipality is willing to sponsor the energy costs of everyone driving.
If you are talking about pure electrical cost, the average cost per kwh in the US is about 12 cents according to NPR.
An average Nissan Leaf battery is about 24kwh (although some cars have much smaller or larger batteries). So if you assume an average Leaf is totally empty, and charging to completely full, that would be a little less than $3 of electricity for roughly 84 miles of range.
To charge a car quickly takes a lot of electricity. But to trickle charge a car takes very little electricity. You can charge cars on as little as 120 volts at 8 amps -- that's less electricity than the average plug-in space heater.
A small parking lot could easily handle 20+ cars simultaneously charging overnight, with just a single standard US household circuit. (100 - 150 amps).
It costs $1 to put 8kW (30miles) into a car, and takes about an hour (for a level 2 charger) so the cost of electricity is less than the land value (unsubsidized meter rate) of the parking space itself, in any urban area.
no because carparks don't have the electrical power availed to support charging hundreds or cars at at a time - they will have enough to run the lights but not enough to service hundreds of high amperage car chargers
Why does everything good in the world get ruined? Because some people are just dicks. Unless there are active fines for holding up the queue in fast chargers, selfish people will make it worse for everyone.
There are charges, after your car is fully charge if you leave it on the charger for more than 10 minutes you start to be charged for the the extra time you leave you car there.
This is still a problem if you can charge in 5 minutes.