CenterPoint presentation: study estimates 4'5x January generation needed to replace gas heating; lawmakers press storage and future-grid assumptions

Dr. Joel Lynch, an energy efficiency engineer with CenterPoint Energy, presented a state-specific analysis to the House Energy Finance and Policy Committee on April 9 estimating the additional electric capacity Minnesota would require if natural-gas space heating were fully electrified.

"My talk is peak heating with natural gas. The missing piece in Minnesota's electrification puzzle," Lynch told the committee. He said the study used CenterPoint's daily gas-throughput data scaled statewide, applied coefficients of performance (COPs) for different electrification scenarios (residential, commercial, industrial) and estimated how much electric capacity and renewable generation would be required to cover peak heating demand in January.

Lynch reported a headline range: gas space-heating throughput up to about 40 gigawatts based on historical data, which converts to an added electric January load of roughly 29.6'35.1 gigawatts depending on efficiency scenarios. He summarized that replacing gas heating on peak days could require increasing Minnesota's January electric-generation capability by about four to five times current values, citing illustrative resource-equivalents such as "24 to 28,000 wind turbines" or "35 to 41,000 solar farms" as the scale of new nameplate capacity implied by the conservative calculations.

The presentation focused on conservative peak-day and peak-month estimates and explicitly excluded modeling of speculative future technologies. Multiple lawmakers pressed Lynch on those exclusions. Representative Kraft asked whether long-duration and seasonal storage, future demand growth (data centers, EVs) or advanced grid flexibility were included; Lynch and CenterPoint representatives said those items were generally outside the study's scope and that the report deliberately provided conservative, bounded estimates.

Other members said the study was a useful baseline but argued it was one side of a broader policy discussion. Representative Roth said grid evolution, energy-efficiency and demand-response measures and the potential to use excess renewable capacity for industrial applications (for example, green fuels or materials production) would change the calculus and deserve attention in future analyses.

The committee did not take action on policy at this hearing; the presentation was accepted for the record and committee members signaled further technical questions would be pursued offline.

"Our goal is just to outline what capacity additions would be required in the event Minnesota decided to no longer have natural gas within state borders," Lynch told the committee when asked what lawmakers should take from the study.