AEE · 10-Q · 2026Q3 · Full report
Energy Efficiency Investment Plan
AMEREN CORP · 2026-11-06 · Importance 65 · Surprise 82 · No source text
Ameren Illinois’ updated electric energy-efficiency plan proposes investments of up to $192 million in 2027, $239 million in 2028, and $276 million in 2029. The ICC’s decision on the plan was expected in November 2026. The plan follows an increase in the annual spending cap under the CRGA and replaces the previously approved level of approximately $126 million per year through 2029. For 2027, the return-on-equity component will use Ameren Illinois’ ICC-approved 8.72% electric-distribution ROE, subject to applicable performance adjustments.
Key facts
- Ameren Illinois’ electric energy-efficiency plan filed in May 2026 proposes investments up to $192 million in 2027, $239 million in 2028, and $276 million in 2029; an ICC decision was expected in November 2026.
- The ICC-approved plan allows Ameren Illinois to invest approximately $126 million per year in electric energy-efficiency programs through 2029.
- For 2027, the ROE used for Ameren Illinois energy-efficiency investments will be the ICC-approved 8.72% ROE from its electric distribution service MYRP review.
- Ameren Illinois filed an electric energy efficiency plan in May 2026 with annual investments up to $192 million in 2027, $239 million in 2028, and $276 million in 2029.
- Ameren and Ameren Illinois’ operating cash flows included $176 million of outflows for the customer generation rebate program in the nine months ended September 30, 2026, compared with $40 million in 2025.
- Ameren Illinois expects the ROE component of the energy-efficiency investment WACC through 2026 to be based on 30-year U.S. Treasury yields plus 580 basis points.
- The allowed ROE on Ameren Illinois electric energy-efficiency investments may be adjusted by up to 200 basis points based on annual energy savings and demand goals.
- The ICC’s decision on Ameren Illinois’ electric energy efficiency plan was expected in November 2026.
Impact estimates
| metric | direction | stage | expected | basis |
|---|---|---|---|---|
| cash | negative | probable | -0.3% | Ameren Illinois’ electric energy-efficiency plan filed in May 2026 proposes investments up to $192 million in 2027, $239 million in 2028,… |
| cash | negative | realized | -0.3% | Ameren and Ameren Illinois’ operating cash flows included $176 million of outflows for the customer generation rebate program in the nine… |
| cash | negative | probable | -0.2% | The ICC-approved plan allows Ameren Illinois to invest approximately $126 million per year in electric energy-efficiency programs through… |
| operating_income | unclear | contingent | — | The allowed ROE on Ameren Illinois electric energy-efficiency investments may be adjusted by up to 200 basis points based on annual energy… |