Footnotes from Toyota indicate they rely on a “high-pressure hydrogen tank,” suggesting ... without the noise of a combustion-engine generator. The cartridges take a difficult and fussy ...

“The 70 megapascals (MPa) resin high-pressure hydrogen tank ... as well as fuel cell generators,” it said. “Toyota developed this hydrogen storage module as a way to answer these demands ...

One downside though is the need for hydrogen vehicles to have heavy high-pressure tanks. While a 700 bar tank and the accompanying fuel cell is acceptable for a city bus or a truck, it becomes ...