In September 2020, the New York Independent System Operator announced the final step in a years-long process to open the NYISO’s wholesale energy markets to Energy Storage Resources (ESRs). This development makes the NYISO the first ISO/RTO to allow full participation of these resources in energy, capacity, and ancillary services markets.
The process of designing these tariff modifications began with FERC’s Order No. 841, Electric Storage Participation in Markets Operated by Regional Transmission Organizations and Independent System Operators. This directs ISOs and RTOs to develop a model to integrate storage participation in wholesale markets, including energy, capacity, and ancillary market services. The NYISO submitted its proposal to comply with the directives of Order No. 841 to FERC in December 2018.
In April 2020, final revisions to the proposed tariffs were filed, which are cited below. Subsequent filings in June set a date for those revisions to go into effect, culminating in the September 2020 press release announcing the full participation of storage in NYISO markets, also cited below.