The hype and media noise around grid-scale energy storage in the U.S. is reaching saturation levels. California’s energy strategy is a forcing function for more storage but what about the rest of the country? While ISOs like PJM have instituted competitive frequency regulation procurement, storage is only one of many options that can compete for this service. This presentation will summarize results from independent, competitive assessments focused on life cycle costs and commercial readiness of the various options.