This law requires the California Public Utilities Commission (CPUC) to open a proceeding to determine appropriate utility procurement targets, if any, for energy storage systems that are commercially available and cost-effective.
The CPUC opened the rulemaking (R.10-12-007) on December 19, 2010. The rulemaking consisted of several phases of workshops, modeling of energy systems, staff reports, proposed decisions, and stakeholder input. The full timeline of the rulemaking process, as well as many pieces of documentation, can be found at http://www.cpuc.ca.gov/PUC/energy/electric/storage.htm.
At its October 17, 2013 meeting, the Commission adopted a 1.325 GW procurement target for energy storage by 2020, with biannual targets increasing every two years from 2016-2020. The targets were further broken up by "use case buckets" (transmission-connected, distribution-connected, and behind-the-meter) and by each of California's three Investor Owned Utilities (IOUs). Electric Service Providers and Community Choice Aggregators were directed to procure energy storage resources equivalent to 1% of their peak capacity by 2020.
The full adopted decision can be found at http://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M078/K912/78912194.PDF
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