Quote:
Originally Posted by crmalcolm
Yes - and if you burned the petrol at a constant rate of 40KWh, then it would last for one hour. The power at any one time would be 40KW - not 40KWh.
The same 40KWh would last for two hours, if burnt at a constant rate of 20KW. Four hours if burnt at 10KW etc.. The energy demand on the source would be the same, but the power demand would be different.
The grid is already prepared for surge events (or pick ups). They forecast that they can cope with approximately 1.2 milllion kettles being turned on (typically 3KW each). The move towards EV charging pick ups would happen gradually, and measures would be in place.
It is interesting you use petrol in your analogy too. The Nissan Versa Note is quoted as delivering approximately 40mpg. The Nissan Leaf Acenta has a range of 168 miles on a 40KWh battery.
So the Versa gives a range of 40 miles from 40KWh of energy. The LEAF gives a range of 168 miles from the same amount of energy.
|
Very few EVs can do over 3 miles per KWh except in very favourable conditions .
https://whatcar.com/news/what-car-re...l-world/n18161
This test shows the real mileage of the Leaf as 128 miles.
Yes , the grid is prepared for surge events .
The Dinowig generator is there to cope with a several GW surge for a couple of hours , or to balance the frequency restart in case of blackout , but once used , then needs days of taking power back from the grid to refill the reservoir.
But there is still not enough generation capacity in the UK to charge more than a small percent of total road vehicles if they went EV.