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spaceywilly • today at 6:07 PM • 1 reply • view on HN

Yep, having each individual person commuting in their own car is just not that efficient in general. Another data point that amazes me is the NYC subway uses 4-5 million kWh per day. Sounds like a lot until you realize that around 4 million people ride it every day, that’s about 1kWh, or maybe like 20 cents of electricity, per rider. A person commuting 35 miles in an EV would take about 10 kWh daily. They’re never going to beat the efficiency of public transportation.

Also regarding filling up an EV as fast as gasoline, there’s a company in China that has demonstrated charging from 20-80% in 5 minutes. They’re using 3MW charging.

It makes you realize why gasoline has been so popular for so long, you can stop for 5 minutes and dump 500 kWh of energy into your tank. Unfortunately most of that is wasted as heat during the combustion process.


Replies

tarpitt • today at 6:13 PM

>Also regarding filling up an EV as fast as gasoline, there’s a company in China that has demonstrated charging from 20-80% in 5 minutes. They’re using 3MW charging.

Yeah that's the exact post I saw. I didn't believe the video at the time but I suppose it's possible with enough battery paralellism and cooling.

https://www.thecooldown.com/green-tech/new-ev-technology-cha...