
Energy Central How to un-duck the grid
Dec 9, 2025
Craig Lewis, the Founder and Executive Director of the Clean Coalition, dives into the energy challenges posed by the 'duck curve.' He discusses how local solar and distributed energy resources can effectively flatten this curve, reduce transmission costs, and enhance grid resilience. Craig also challenges traditional views on energy generation, advocating for localized solutions instead of over-investment in transmission infrastructure. With case studies like the Sierra Blanca Microgrid, he highlights the economic and environmental benefits of innovative energy planning.
AI Snips
Chapters
Transcript
Episode notes
What The Duck Curve Really Shows
- The duck curve shows total transmission-delivered demand versus net demand after transmission-connected solar and wind are subtracted.
- Its midday belly and evening head highlight why balancing supply/demand, not just adding remote renewables, is essential.
Local Renewables Shrink Transmission Demand
- Local renewables and distributed energy resources (DERs) reduce transmission demand and therefore lower the head of the duck.
- Transmission is the fastest-growing component of electricity costs, so shifting generation to distribution saves ratepayers money.
Transmission Costs Are Bigger Than They Appear
- Transmission access charges (3–7¢/kWh wholesale) are large and mostly hidden from ratepayers, and become much larger in retail form.
- Transmission investments carry long-term returns and operation costs that multiply the apparent capital spend.
