Producing hydrogen and storing at point of use is an option but it opens up a different problem. With regard to efficiencies you lose several bites of the appl

Producing hydrogen and storing at point of use is an option but it opens up a different problem. With regard to efficiencies you lose several bites of the apple by taking this approach. The whole hydrogen battery chain then becomes; electrical -> stored chemical -> mechanical (via combusion) -> electrical. I would strongly argue a gravitational battery would be more efficient (and simpler to construct) at scale for large energy storage. i.e. electrical -> motor (pump water up into a dam) -> motor spins (via release of water from dam) -> electrical (or bricks if a dam can't be built efficiently) And with the latter you need a hydrogen burning plant with variable capacity which is designed to be largely on standby throughout its serviceable life. I'm not arguing against hydrogen cars, or hydrogen gas home heaters (the latter being great, thermal -> thermal for water heating is better than electrical -> thermal). I just don't see it playing a major industrial component of energy storage due to these shortcomings.