Amazon Data Center Backup Generators Win Final North Carolina Air Permits
North Carolina regulators have issued final air permits covering 588 Amazon data center backup generators and 57 temporary Duke Energy bridge-power engines at the Energy Way Tech Campus in Richmond County.
Published · 3 min read
Amazon data center backup generators planned for the company’s Energy Way Tech Campus in Richmond County, North Carolina, received final state air permits on August 28, 2026, as regulators also authorized Duke Energy Progress to operate temporary generation that will supply the facility before its permanent grid connection is available.
The North Carolina Department of Environmental Quality said Amazon’s permit covers 588 emergency backup engines, while Duke Energy’s separate permit allows 57 temporary non-emergency engines to provide what the utility describes as bridge power. Duke must retire those temporary engines within one year after they begin operating, according to the final permitting announcement from the Division of Air Quality.
588 Amazon data center backup generators will remain as emergency power
The two power systems perform different roles.
Amazon’s 588 engines are intended to remain at the Energy Way Tech Campus as emergency backup generation. State regulators said they may operate during power outages as well as for limited testing, maintenance and activation.
Duke Energy’s 57 engines are temporary. They are intended to provide electricity to the campus while Amazon waits for the permanent utility connection, creating an unusually large example of a data center using on-site generation as a bridge to grid service.
North Carolina regulators first described that structure during the permitting process, when the Division of Air Quality outlined the separate Amazon and Duke Energy applications.
Final permits added testing and monitoring requirements
The August 28 decision followed a public hearing and 30-day comment period that generated concerns about emissions, community impacts and the use of separate permits for the Amazon and Duke Energy systems.
NCDEQ said the final Amazon permit clarifies fuel-use monitoring, while Duke Energy must conduct additional initial generator testing. The Duke permit also specifies that electricity from the temporary bridge-power engines must be used exclusively for the Amazon facility.
Both permits include additional recordkeeping and reporting requirements.
State regulators said air-dispersion modeling indicates that each facility can operate within applicable health-based air-quality standards. The agency also evaluated a worst-case operating scenario and said actual emissions from Amazon’s emergency generators are expected to be substantially below that level.
The project highlights the power challenge facing large data centers
The Richmond County arrangement illustrates a growing issue in the data-center market: construction schedules for computing campuses can move faster than utilities can deliver permanent grid capacity.
That gap is pushing developers toward temporary generation, dedicated substations, batteries, demand flexibility and increasingly complex behind-the-meter power architectures.
Microgrid Media recently reported on Georgia Power’s 3.2 GW electricity agreement with OpenAI, where as much as 1 GW of demand flexibility is planned as part of the utility arrangement. Although the Georgia and North Carolina projects use very different power strategies, both demonstrate how exceptionally large computing loads are forcing utilities and data-center operators to negotiate requirements that extend beyond conventional electricity service.
The trend also intersects with broader reliability concerns. NERC has directed grid organizations to improve modeling and operational coordination for large computational loads because abrupt changes in data-center demand can create challenges for transmission planning and grid operations.
Bridge generation will eventually give way to grid service
The final permits do not make Duke Energy’s temporary generation a permanent substitute for utility service.
NCDEQ requires the 57 bridge-power engines to be retired within one year after they begin operation. Amazon’s emergency-generation fleet, by contrast, is intended to remain as backup capacity after the campus connects to the grid.
The distinction is important. The 57 Duke engines address a near-term electricity-delivery constraint, while Amazon’s 588 engines are part of the site’s long-term reliability architecture.
The next significant milestones will be commissioning of the temporary generation, completion of the permanent grid connection and operating data showing how frequently the two sets of engines actually run.
Jonas Muthoni is Editor-in-Chief of Microgrid Media, where he oversees reporting and analysis on microgrids, energy storage, distributed energy resources, data center power demand, grid modernization, resilience, renewable energy, and electricity policy and markets. His work focuses on the infrastructure, technologies, and regulatory developments reshaping the power system.
As Editor-in-Chief, Jonas leads Microgrid Media’s editorial strategy and standards, including story selection, source verification, technical accuracy, and the development of original reporting and analysis. His coverage draws on regulatory filings, government records, utility and company disclosures, technical documentation, and independent industry sources to explain significant developments across the evolving energy system.
