I've been watching the math of batteries and cargo ships and we may not be too far from shipping electrons generated in the Sahara to the UK and Europe at a reasonable price. That totally changes the game if you have cargo ships moving to where the power will be needed. I can imagine these ships going to where the weather is predicted to cause an issue to help even out the grid and just in general creating a responsive base load for the world. It sounds like sci-fi, but with the direction batteries have gone it isn't that crazy anymore.
Does it still work out if you take into account the insurance premiums for a cargo ship stacked with batteries? Can't imagine the fire hazard is pretty.
Wait until you hear what other stuff gets shipped
Oh, there's precedent for shuttling freighter size metal fire hazards intercontinentally to top up charge, is there?
How does that work out in cost per kWh? Profitable operation anywhere close?
Crisis relief (as suggested by jmward01 here) may be another matter, but setting up the ability to do this on scale, and maintaining it, can't be anything like easy economically.