DODGING THE FIRM FIXATION FOR DATA CENTERS AND THE GRID

The report critiques the 'firm fixation' approach where utilities meet surging data center demand by adding gas plants or refurbishing coal units. It identifies six defining features of data centers—agency, clustering, consumption profiles, flexibility, backup requirements, and modularity—that make them unsuitable for simple one-to-one matching with firm power plants. Instead, the author advocates for a 'system of systems' approach combining clean energy portfolios, battery storage, and demand-side flexibility. Key recommendations for policymakers include using the interconnection process as leverage to ensure cost causation and exploring demand-side resources, such as sponsoring household energy upgrades, to free up grid capacity.

• The 'firm fixation' is a tendency for utilities and developers to rely on outdated solutions like new gas plants, refurbished coal units, or nuclear partnerships to handle data center load, based on the belief that only firm resources and major transmission upgrades are sufficient.
• Data center electricity demand is not a steady 24/7 block but is characterized by significant variability and 'choppy' consumption profiles, with potential swings of 200 to 300 MW within ten minutes as facilities move between learning and stop-learning modes.
• One-to-one matching of data centers with dedicated 'captive' firm power plants is considered unwise because it exposes both parties to outages, inflexibility, and stranded-asset risks, and fails to account for the phased, modular growth of data center campuses.
• Data centers tend to cluster geographically due to favorable conditions like fiber density and tax regimes, which amplifies local grid stress and can lead to multi-year waits for power hookups, as seen in Northern Virginia.
• AI-driven workloads offer significant potential for flexibility; some hyperscalers may be willing to curtail up to 25 percent of their load for up to 200 hours in exchange for priority interconnection of 1 GW.
• The current reliance on diesel for backup generation is unsustainable due to scaling issues, environmental risks, and permitting challenges; batteries and longer-duration storage are presented as cleaner, scalable alternatives.
• Data centers grow in modular phases, which aligns better with the deployment of renewables and batteries than with 'lumpy' one-time investments in large dispatchable power plants.
• Interconnection is identified as the moment of maximum leverage for policymakers to ensure new entrants cover the full costs of triggered infrastructure and to encourage the use of flexible demand or local storage.
• Demand-side resources outside of data centers could mitigate load growth; for example, hyperscalers sponsoring household heat pump and rooftop solar upgrades could potentially free up 30 GW and add 109 GW of capacity, respectively.

APA

Gimon, E. G. (2025). DODGING THE FIRM FIXATION FOR DATA CENTERS AND THE GRID. Energy Innovation. https://energyinnovation.org/wp-content/uploads/Dodging-the-Firm-Fixation-for-Data-Centers-and-the-Grid.pdf

Chicago

Gimon, Eric G. DODGING THE FIRM FIXATION FOR DATA CENTERS AND THE GRID. Energy Innovation, 2025. https://energyinnovation.org/wp-content/uploads/Dodging-the-Firm-Fixation-for-Data-Centers-and-the-Grid.pdf.

Wikipedia

{{cite report |last1=Gimon |first1=Eric G. |title=DODGING THE FIRM FIXATION FOR DATA CENTERS AND THE GRID |publisher=Energy Innovation |date=November 2025 |url=https://energyinnovation.org/wp-content/uploads/Dodging-the-Firm-Fixation-for-Data-Centers-and-the-Grid.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{gimon2025dodging, author = {Gimon, Eric G.}, title = {{DODGING THE FIRM FIXATION FOR DATA CENTERS AND THE GRID}}, institution = {Energy Innovation}, year = {2025}, month = nov, url = {https://energyinnovation.org/wp-content/uploads/Dodging-the-Firm-Fixation-for-Data-Centers-and-the-Grid.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }