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In this project they are using "158 Tesla Megapacks". Is there any utility level battery storage (commercially available) that is not using Lithium?

I remember a while back a stream of projects using molten metals to create (less energy dense but more affordable) batteries for utility scale. Has anything like that come to life?

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Sodium Ion is looking promising for a cheaper alternative, with currently lower energy density than LFP (lithium iron phosphate) and NMC (high nickel li ion). BYD is trying to scale sodium ion, but based on analysis (I’m open to other points of view) from The Limiting Factor on YouTube, it won’t be at the same scale as lithium or make a meaningful dent in world battery production in GWh units until the late 2020s or early 2030s.

Thanks. Off-topic I naively assumed from general news that BYD was just in the auto business. Interesting to see all the sectors they are in.

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