PJM, CAISO and SPP took a step closer to the full implementation of Order 841 with FERC’s partial acceptance of their Tariff revisions.

FERC found that CAISO, ISO-NE and MISO had largely complied with Order 841, but it ordered changes to some of the grid operators’ proposed tariff revisions.

FERC issued deficiency letters to all six jurisdictional RTOs and ISOs over their proposed energy storage rules, pressing for definitions, tariff citations and other details.

RTOs and ISOs filed tariff revisions to provide energy storage resources more opportunities to participate in markets in compliance with FERC Order 841.