3 ms·

It is very hard for hydrogen to overcome it's 25% grid to motor efficiency [1]. It means that it will always be significantly more expensive per kWh delivered

• avmich 11y ago
  https://en.wikipedia.org/wiki/Fuel_cell#Efficiency_of_leading_fuel_cell_types https://en.wikipedia.org/wiki/Fuel_cell#Efficiency_of_leadin... "According to the U.S. Department of Energy, fuel cells are generally between 40–60% energy efficient." I feel like I'm reading a beauty contest gossip :) . Strong opinions, weak arguments...
  • _rpd 11y ago
    > fuel cells are generally between 40–60% energy efficient Which is reduced to 25% grid-to-motor efficiency when electrolysis and compression (required for practical energy densities) are taken into account. As illustrated in the linked graphic. Electrolysis is assumed since other methods (e.g., methane reformation) generally generate greenhouse gases, but there has been some work on algae bioreactors [1] that might become economically interesting. [1] https://en.wikipedia.org/wiki/Biological_hydrogen_production_(Algae) https://en.wikipedia.org/wiki/Biological_hydrogen_production...