Sodium-ion batteries make more sense for storage IMO than...

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    Sodium-ion batteries make more sense for storage IMO than Lithium-ion batteries.

    Weight and energy density is not a crucial factor for storage batteries.

    Sodium is an abundant cheap material.

    Safety, they won't catch fire like lithium-ion batteries.

    Zinc-Bromide flow batteries would also be good for storage.
 
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