[lgbr]

> Hydrogen is a terrible battery. Best case conversion to H2 is ~80%, while best case fuel cell efficiency is ~50%. That's 40% round trip while most batteries can do 90%.

While there's no arguing with the physics here, don't forget the economics either. The price of electricity in Denmark on a cloudy, windless early evening can easily be 10 or more times the price in Newfoundland. Then start factoring in that a plane carrying hydrogen is significantly lighter than a plane carrying batteries.

While you might be using 10x as much electricity at the point of generation, you're paying a lot less for it, and you're using it more efficiently.