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If you are going to do Hydrogen, you might as well do Electric/fuel cells. They are less energy efficient than Li-Ion, but you can store the equal of 20 gallons of gas in about 50 lbs! This is equal to the storage of 360 kWh. Fuel cells don't weigh much, so I expect that even with the Compressed Hydrogen tank, Fuel cell, etc., the car will weigh less.
360 kWh would give you a range of 800 miles with a Tesla, and probably lighter. I do expect you will need a small battery (10-20 kWh) for high power.
90kWh battery weighs 1,200 lbs. Replace with a 15kWh battery (weight 200), 100 lbs for the fuel cell, 50 lbs hydrogen. That is 350. I doubt the hydrogen fuel tanks will weigh more than a few hundred pounds for 50 lbs of hydrogen.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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