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.
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.