WEDNESDAY AGGREGATE: Rule 21 Interconnection Review Opens; CPUC Expands PG&E 2027 GRC Scope

Today's roundup includes the following items.

• Interconnection: A scoping memo in the Rule 21 Update proceeding indicates that the OIR's initial phase will focus on whether the CPUC should:
  • Modify technical screening tools used to evaluate grid impacts;
  • Revise interconnection timelines and compliance benchmarks established in 2020; and
  • Reconsider the $800 flat interconnection application fee currently applied to non-Net Energy Metering and non-Net Billing Tariff resources.
• PG&E 2027 General Rate Case: An amended scoping memo expands this proceeding to address Assembly Bill 2666 and Assembly Bill 2847, which require the CPUC to examine utilities’ actual-versus-forecasted rates of return, and to evaluate the revenue-requirement impacts of proposed capital expenditures in future applications.
• Risk Assessment and Mitigation: A ruling in the Sempra IOUs' Risk Assessment Mitigation Phase docket directs SoCalGas and SDG&E to provide additional information regarding their 2025 RAMP filings, which will inform the utilities’ upcoming Test Year 2028 General Rate Case application. The ruling demands greater transparency from the IOUs.
• SCE 2022 ERRA Compliance: A new Edison advice letter implements the CPUC’s January decision in its 2022 Energy Resource Recovery Account compliance proceeding.
• PG&E ERRA Trigger: PG&E filed an advice letter to establish its 2026 ERRA trigger amount. Based on 2025 generation-related revenues, PG&E sets the 4% ERRA trigger amount at $166.5 million and the 5% threshold at $208 million. If its net ERRA balance reaches the trigger level and approaches the threshold, PG&E must file an application proposing rate changes to amortize the balance.
• PG&E Hinkley Compressor Station: An ALJ ruling in PG&E's application for a Certificate of Public Convenience and Necessity to construct electrical upgrades at the S-238 Hinkley Compressor Station directs PG&E to provide additional information regarding its recent motion to withdraw the application and pursue the project under an emergency exemption.
• Load Control: SCE filed a report describing the results of its Load Control Management System pilot, a two-year program that tested whether customer-owned load-control technology could allow new electric loads to be energized in grid-constrained areas before distribution upgrades are completed.
• Public Safety Power Shutoffs: PG&E, SCE, and SDG&E each submitted their 2025 Public Safety Power Shutoff Post-Season Reports in the CPUC’s de-energization rulemaking (R.18-12-005). The filings are compliance updates, but they help finalize the official record of 2025 PSPS operations.