[epistasis]

These are all grid investments. About half of the storage is being installed in Texas, which is the closest thing the US has to an open market for investors.

The storage being installed in Texas is all being done purely for profit. Meaning that the investors have run the numbers and find batteries to be the highest return they think they can get for their money.

Storage in other places (specifically California) is being driven both by the profit motive, but also in some cases by legislation that mandates storage (not specifically batteries) be added as part of the grid mix. California has enough solar now that nearly all new installations include storage, in order to profit during the peak evening hours when electricity prices are highest.