[AngrySkillzz]

There are also alternative storage solutions, like flywheel and pumped water storage. I don't know where those stand at the moment, but I imagine that a they are at least competitive with batteries, seeing as current batteries have fairly low storage capacity and need to be replaced regularly.

[toomuchtodo]

I excluded flywheels and pumped storage as they're rarely cost effective except in a few edge cases. Cargo containers full of batteries can be trucked or sent by ship anywhere necessary, and I expect them to get cheap very fast.