Hydrogen for short term storage, ammonia for medium term storage. Both much less efficient than just using electricity directly, but the aim is to drive down th

Hydrogen for short term storage, ammonia for medium term storage. Both much less efficient than just using electricity directly, but the aim is to drive down the cost of generation so that the inefficiency doesn’t matter so much. There are also tons of other short-medium term storage solutions, and we probably need all of them that we can get our hands on, but hydrogen and ammonia are the ones that feel most likely to operate at grid scale.