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Solid state batteries will be used in hybrids first, mainly because of cost. Hybrids use relatively small battery packs. Higher end vehicles will be first all-electric vehicles to get solid state packs($100k+ msrp). Lower end more affordable EV's will remain using traditional lithium ion batteries. Only until manufacturers can get solid state production costs equal or below lithium ion batteries, we won't see them in majority of EV's(decade+ away). Lithium ion battery prices are expected to reach approximately $60/kWh by 2030, in the same time frame solid-state batteries are expected to cost approximately $80-90/kWh. So 8 years from now, we will still be looking at a 35-50% premium for solid state batteries. This is going to take time.
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