[DoingIsLearning]

The advantage of a system as simple as compressed air, is that anyone with a minimal technical background and shop tools is able to maintain and minimally repair the compression system.

An electro-chemical hydrogen conversion and compression vessel would have far more points of failure with far greater technical barriers to repair. The access to specialized spares in a remote location would also be a major issue.

I am not saying it cannot become a player in energy storage to eliminate the need for coal and natural gas energy generation. But it seems unlikely that would be a good choice for remote 'off-grid' location.

[jacknews]

Indeed, compressed air seems ideal for hot humid climates (cool/dry air being a byproduct of discharge), which are are often quite low-tech.