The disadvantages of electric cars given in that video, namely long charging time, low range, high cost can become ADVANTAGES if done right - namely 7SSS
Charging time:
Petrol and diesel = 3 minutes to refill. 7SSS = 7 seconds to refill. Even with 5 refills to get to the same distance as a full tank of hydrocarbon, that's only 35 seconds instead of 3 minutes = six times faster than hydrocarbon refilling.
Range:
Hydrocarbon = 600 km or so. 7SSS = 120 km. But with 7SSS stations where there are currently gasoline/diesel service stations, the distance to refilling would not matter. The reason hydrocarbon range was pushed up to 600 km or even more was that the extra weight of fuel and tank and the space taken up were small. It meant less time refilling en route and less cost as a long range avoided the delivery cost of fuel to rural areas which added to cost. Rural service stations could be notoriously expensive due to a captive market.
Due to the absence of 7SSS stations, bigger batteries are needed to go roaming around the countryside. Fleets that stay in a city such as taxi fleets, delivery vehicles and commuter cars don't have that range problem. They can use 7SSS.
To get range, a few more battery modules could be plugged in.
Around town, range doesn't matter because 7 seconds at a 7SSS is no delay. It would even be a short cut at corner 7SSS stations where traffic lights hold up others. Instead of waiting in the queue, drive into the service station for 7 seconds, then out onto the other road and on your way.
Cost:
With a fifth of the battery weight, that's a BIG cost reduction. Now just in the cost of the battery but in the structural and other components of the car because carting a huge battery around means more structural strength to keep if off the ground and more motive power to get the damn thing moving. Plus the extra energy needed to cart the extra weight around.
By having a stack of batteries at the 7SSS station, recharging could be done when power prices are low, such as when the sun's shining and photovoltaics are needing a place to deliver electricity, or when base load thermal and other power stations have low demand. That means cheaper electricity prices compared with on-demand supercharger stations.
Elon Musk is now talking about having big batteries at supercharger stations to absorb photovoltaic energy but it's unnecessary to have spare batteries in cars and at supercharger stations.
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