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Cake day: July 4th, 2023

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  • A hydrogen engine is so much worse for efficiency than a hydrogen fuel cell, and even that is not good compared to batteries. I’d estimate the round trip efficiency of a hydrogen engine to be about 10-15%. So for the same energy that could be used to drive a battery EV 100km, this car from Toyota could drive 12km.

    Additionally, hydrogen is not very energy dense per volume. A compressed hydrogen tank that replaces the boot/trunk of the car would have enough hydrogen for about 100km of range.

    Please let me know if I’m wrong about any of these numbers. For Toyota’s sake, I really hope I’m wrong.







  • The main problem with the new leaf is the lack of battery cooling. After 3 (sometimes 2) rapid charges in a day the battery is at max temperature and the charge rate drastically reduces.

    Unless you already have a CHAdeMO V2G charger, I recommend choosing an EV with battery cooling (almost all of them). You can probably find one with more features and longer range for a lower price than a new Leaf.

    If you aren’t planning on using the car enough to worry about battery overheating, and you enjoy the test drive, it’s not actually a bad car. Just a little overpriced.