The Federal Energy Regulatory Commission (FERC) has issued a deficiency letter to Southwest Power Pool (SPP), alleging that the proposed Markets+ tariff is deficient and requires more information about how transmission capacity is made available to market participants, among other lacking details. FERC has also requested more information on a proposed greenhouse gas pricing mechanism, a proposed hydroelectric resource capacity assessment, and how resource aggregations may impact market operations. SPP plans to launch the Western day-ahead electricity market in early 2027 to lower costs and improve system reliability across the region. The agency’s 12-page deficiency letter also includes questions about transmission capacity availability and scheduling, a potential greenhouse gas price mechanism, and the process and timeline for SPP to explain how it will determine if a resource aggregation has or is anticipated to have a “material impact on market operations” and how it would affect SPP’s decision to use expected costs. The response to the FERC requests will be submitted within 60 days of the deficiency letter.
Solar Dominates US Energy Capacity Growth
The Federal Energy Regulatory Commission (FERC) has published data showing that solar accounted for over 75% of US electrical generating
