Yes, there is a market for stationary energy storage for electrical grids. It's small so far, and pretty fragmented, though growing quickly from a small base. I

Yes, there is a market for stationary energy storage for electrical grids. It's small so far, and pretty fragmented, though growing quickly from a small base. It's anyone's guess whether the stationary storage market will sustain distinct storage chemistries that aren't suitable for mobile applications (various kinds of flow batteries, sodium ion batteries, sodium-sulfur, liquid metal...) or whether lithium ion will end up everywhere due to its early lead and continuing cost/technical improvements. Even lithium ion ends up everywhere, there could still be chemistry differences between cells built for stationary grid backup and cars or phones, but they would be more subtle.