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wesleydtoday at 3:39 AM4 repliesview on HN

Gas pumps in the US are artificially capped at 10 gallons per minute, and a gallon of gasoline is about 33kWh, so petrol cars in the US “charge” at 330kWh/min ~= 20MW. But most cars only turn about a third of that into motion, so let’s say 7MW equivalent? While BYD’s 1.5MW is amazing, it seems a stretch to call it “almost as fast as gas pumps.”

Diesel pumps for trucks typically pump much faster too. And diesel is nearer 40kWh/gal. We have a ways to go!

(The energy density of oil is amazing: a fully loaded A380 with 84,500 us gallons of jet fuel at 37.5 kWh per, that’s over 3TWh. Which is about twice the capacity of all the li-ion batteries made in 2025. We have a ways to go!)


Replies

thelastgallontoday at 3:50 AM

99.9% of use cases of EVs can charge at home/work/shop, don't need separate infrastructure, logistics and supply chains for delivery of electricity. There is a very small fraction of EV trips that need charging on the go. The vast majority of trips are under 3 (or 5 miles).

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sjducbtoday at 7:07 AM

It’s the same order of magnitude, allowing people to mentally budget zero time for a charge.

thelastgallontoday at 4:47 AM

> The energy density of oil is amazing

Have you heard about nuclear? Over 3 million times more energy dense than coal or gasoline.

robertjpaynetoday at 4:48 AM

Fair but any EV owner knows after a bathroom break, quick stretch and maybe a bite to eat every 1-2hr while charging and you never even notice the stopping to charge time.

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