A Decade of Decoupling for US Energy Utilities: Rate Impacts, Designs, and Observations

Collaborative Report


Pamela Morgan, Graceful Systems LLC


Building on a 2009 report, A Decade of Decoupling for US Energy Utilities summarizes the decoupling mechanisms utilities use and the rate adjustments they have made under those mechanisms. In total, the report estimates the retail rate impacts of 1244 decoupling mechanism adjustments since 2005. These rate adjustments, the report finds, are mostly small (within +/- 2% of retail rates) and yield both refunds and surcharges. In addition, the report updates the summary of the features various states and utilities have used in constructing their decoupling mechanisms.

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