Understand that, they're about half the cost of lithium currently, but they don't have nearly the same scale benefit as lithium does. It's likely that cost coul

Understand that, they're about half the cost of lithium currently, but they don't have nearly the same scale benefit as lithium does. It's likely that cost could half again if they achieved the same scale. And recall that, early lithium batteries had a fraction of the longevity that current designs have, so, it's likely that sodium batteries have plenty of room for improvement in that regard as well. In my mind, the likely application is grid-scale storage where density doesn't matter as much but upfront cost does. Not really so much for renewables, but more so that you can store your unused base load during offpeak hours for later use.