OET working group: reliability risks will shift to sustained winter peaks; demand response and storage needed

The Office of Energy Transformation presented findings from its "decarbonizing the peak" focus area, concluding that as heating electrification grows, reliability risks are likely to shift from short summer peaks to longer, sustained winter peaks by the 2040s and that peaker plants will remain critical until scalable, cost‑effective alternatives are widely available.

"Reliability risks will shift from short summer peaks where we are now to sustained winter peaks by the 2040s driven by heating electrification and high renewables in the market," Catherine O'Malley, deputy executive director at OET, said while outlining the group's conclusions. The working group emphasized demand response, load management and expanded storage as central tools to reduce peak exposure through 2050.

Key findings: the group recommended a portfolio approach—short‑term actions such as demand response, load management and targeted electrification paired with longer‑term investments in longer‑duration storage, grid optimization and firm clean power. It also stressed that decarbonization pathways for specific peaker plants must be site‑specific, considering community impacts, local grid conditions and technology readiness.

The group called for equity and community engagement to guide transitions so that local benefits, workforce supports and cumulative harms are considered. Presenters also flagged interconnection and regional grid delays as obstacles to deploying new clean resources and suggested regional coordination to speed integration.

Next steps: OET will continue refining recommendations and said a new focused working group on peak energy demand reduction will launch with outreach to prior participants and broader stakeholder engagement. The webinar materials and a forthcoming report will be posted on the Energy Transformation Advisory Board website.

Attribution: Findings and language in this article are drawn from OET's presentation and the focus‑area work group materials presented during the webinar.