Ultimately every space on M-way services car park should have a rapid charger but only a certain number could be used at one time. The car plugs in and driver validates payment, they will have to switch on/off automatically by FIFO queue and as the charging system knows how many cars are in the queue can give you the time you have wait. Unlike a petrol station no one has to be in attendance. Spot the filling stations. One day instead of 2/4 there will be 20
40/50Kw chargers - 0.8 to 1MW.But just for you I'll do it again in a different way.
6MW is 6000KW, 6 minutes of that will be 600KWh. That is 20 times the capacity of a 30KWh Nissan Leaf, 10 times the capacity of a 60KW/h Chevy Bolt / Tesla 3 and 6.6 times the capacity of a 90KW/h Tesla S P90. They go 100/200/300 miles on a full charge. For you to demand a supply of 6MW for 6 min means you must have somehow obtained a vehicle that has a battery pack with a range of 2000 miles! Or you have being spouting FAKE NEWS and listening to idiots.A 60KWh battery pack (Bolt/Tesla 3) is good for over 200 miles, about
2/3 the range of a SI car and 1/2 the range of a big smoker. Instead of filling once every 1 or 2 weeks you will normally fill it daily at home. 60KWh battery can only be charged to 80% on rapid charge and will be starting from about 20%, so only 36KWh to go in on a rapid charge. That is 360KW for 6 min charge time. A whole lot less (just 6%) than the claimed 6MW required for a 6 min charge time but still the load of 120 domestic sockets. With 30 min charge time the demand is 72Kw and at 40min 54Kw, much more achievable.As a 36Kw fill is good for nearly 2 hours driving an extra 30 min charging up is not a huge cost in time. And you won't be standing out in the rain/snow or dancing on a slick of split diesel while it charges up.
How much does that 30 min fill time cost you? Well it actually PAYS you. EV cost per mile is 1/2 of fossil fuel so while 150 miles costs about £18 in fuel it costs £9 in electricity (for public charge points, much less on home charge). The savings you make are effectively EARNING £18/hour while you charge up. If you ever got your demand for 6 min charge time you won't be "earning" £180/hour during that 6 min charge. You would have pay a lot more to have that charge rate and your "earnings" would have to become a payment.
Rapid chargers are 43Kw or 50Kw with Tesla supercharge running 120Kw. These charge an EV to 80% in 20-40 min. Tesla S&X take just as long as the battery pack is 2x the size. Won't be at supermarkets unless they are very close to M-way junctions or major routes. Tesla can have as many 10 superchargers on site (1.2MW), while most EV chargers only have
4 at present (0.2MW).Fast chargers are 7.7Kw single phase or 22Kw three phase (32Amp like your cooker supply, not a poxy domestic socket). 7.7kW charger will recharge in 3-5 hours, 22kW charger in 1-2 hours. These you will find at destinations, hotels, works and yes supermarkets. If there were 50 22Kw chargers on a supermarket car park the load would be 1.1MW. But who does
400 mile round trip to a supermarket?Charging points are on the rise and rising fast.
The big question is whether they should fit a lot of slow 3Kw chargers for 8 hour charge time while at work (7.6 hour working day + 30 min lunch). Then people could commute 60 miles each way in 30KWh EVs. Or 10 miles in PHEV with 5KWh batteries without using a 4 hour rapid charger space.