It is hard to keep track of the movers in the world of energy storage.
I took a shot at assembling, as a list, an Energy Storage Directory, focused on technology development rather than integration, and sorted by technology. I included players that had enough capitalization and/or technology to have an impact on the market. I am not planning to list local or regional integrators.
I am sure that I missed a good number of players – it is clearly a work in progress. Let me know what you think, how it could be made better, and who I should add. I included a request form allowing listing requests at the bottom of the list.