This kind of technology is one of the reasons that sodium-ion is going to scale much faster than the people focused on relative prices of Lithium think. (It is MUCH harder to build passively cooled Li-ion BESS (if its even possible above very small sizes))

Moonwatt brings DC-coupled, passively cooled sodium-ion tech to solar projects - Energy Storage
The Dutch start-up, founded by former Tesla leaders, is taking a novel approach to sodium-ion battery technology, optimizing it for integration with solar power plants. Its technology is set to be deployed for the first time in a Dutch solar-plus-storage project later this year.






