What’s the best metric for evaluating storage? No one has come up with one yet.
Grid-scale energy storage is getting a lot of attention this year. Pricing has come down and perceived value has come up — expanding the commercial viability of different technologies.
But the story is much more complicated. There are plenty of important technical and market-based nuances that need to be considered.
Technically speaking, battery chemistries drive performance, and they vary greatly. New nomenclature and standards are needed for comparing batteries across applications. As anyone who has cycled batteries in the lab will attest, the lifetime of the battery is dependent on how the battery is used and under what conditions.
Performance turns out to be difficult to communicate using a spec sheet, and vendors self-select the data they share. Consequently, the energy storage business has a bad reputation for over-promising.