this post was submitted on 28 Apr 2025
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Sodium ion batteries are going to be the solution. 18650 packs are already out and perform economically. Since the molecules are so much bigger, energy density is only like 60% of lithium based solutions, but they have a very wide temperature range and are incredibly more inert and safe and density isn't a problem for bulk energy storage.
The hurdle to overcome in inverters dealing with the very wide voltage span and bespoke charging ICs, but definitely possible and within 5 years will probably become a lithium iron phosphate competitor.