RE: The Decade Of EV's24 Feb 2020 07:37
Piltick,
Hydrogen cars will NEVER beat EV's on carbon emissions.
The simplest way to spell it out is that if both were powered on solar energy only, the CO2 produced by the cars over their lifetime is made up of the car build plus the solar panel build, plus shipping.
The EV battery is nearly 100% efficient, this drops very gradually but the battery can last 400,000 miles (as proven by a recently sold Tesla which had a new battery at virtually 400,,000 on the clock). The overall efficiency of the EV car is about 85%.
A Hydrogen car is not efficient at all. The power from solar goes into electrolysis, then is pumped to extremely interested high pressure. Then the fuel is pumped into the car. Then the fuel is put through a PEM Fuel Cell. The whole electrolysis to car system process is about 60% efficient. The fuel cell might be 65% efficient maximum. 65% of 60% is 39%.
So every mile that a Hydrogen car travels uses over double the power of an EV and therefore produces over double the CO2 based on the CO2 cost inherent in the solar power.
Then you have add that the Hydrogen car will need it's fuel cell replaced 3 times, maybe even 4 times to get to 400,000 miles.