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NiSource says the 20-year Microsoft agreement would add approximately 1,100 MW of resources to its GenCo pool portfolio and is designed to keep the costs of serving the new load off existing NIPSCO customers.
Published by Allstream Insiders
Allstream Insiders Summary
NiSource has announced a long-term energy agreement with Microsoft for the company’s previously disclosed northwest Indiana campus. According to NiSource’s October 16 announcement, Microsoft is expected to begin taking electric service in 2028 under a 20-year term.
The company said its GenCo-owned pool portfolio would increase by approximately 1,100 megawatts, with NIPSCO and GenCo providing the generation and transmission infrastructure needed to serve Microsoft’s data-center load and NIPSCO customers. NiSource said Microsoft will fully fund the generation and transmission required to serve its load.
The announcement also discloses a 600 MW battery-storage tolling agreement with a facility to be developed and constructed by an affiliate of AGP Group. NiSource said the resource would be added to the GenCo pool portfolio designed to serve multiple large-load customers.
How the agreement is structured
NiSource said it is using its Generation Company LLC, or GenCo, to serve new large-load customers under a structure intended to protect existing Northern Indiana Public Service Company, or NIPSCO, electric customers from incremental costs. The company said large-load customers fully fund the generation and infrastructure required for their needs and that the arrangement is intended to return value from their use of the existing electric system.
NiSource projects that the Microsoft agreement would increase total expected savings for existing NIPSCO electric customers to approximately $1.75 billion over the life of its data-center customer contracts. The company said that equates to as much as $140 per customer annually. Those are company projections, not realized customer savings.
The release does not disclose Microsoft’s individual contracted load, the investment value of the 1,100-MW resource addition, the location of the planned battery-storage facility, ownership details for the GenCo portfolio, or the commercial terms of the Microsoft agreement.
Generation, transmission and battery-storage scope
NiSource said NIPSCO and GenCo would provide transmission and generation infrastructure to maintain an adequate, coordinated power supply for Microsoft’s campus and NIPSCO customers. The company said the assets would upgrade NIPSCO’s electric transmission system and are intended to improve reliability and resilience in Indiana.
In connection with the agreement, GenCo contracted for 600 MW of battery storage under a long-term tolling agreement. NiSource identified an affiliate of AGP Group as the planned developer and constructor of that facility, but did not name a project site, interconnection point, commercial-operation date, equipment supplier, engineering firm or construction contractor.
NiSource also did not identify the specific generation technologies included in the approximate 1,100-MW portfolio increase or state how the resources would be phased. The company said it expects to provide additional operational and financial detail during its third-quarter earnings call.
What remains subject to future execution
NiSource’s announcement presents the agreement and resource plan as forward-looking. The company identifies regulatory approvals, construction, financing, customer performance and the ability to place generation and transmission assets into service as factors that could affect execution.
Accordingly, the release does not establish that all required approvals have been received, that construction has begun, or that the 1,100 MW of resources and the 600-MW battery facility are in service. It also does not announce individual procurement packages or construction awards beyond identifying the AGP Group affiliate as developer and constructor of the battery resource.
Allstream perspective: A utility framework for serving large data-center load
Allstream perspective: The significance of the agreement is its attempt to pair a large data-center customer with dedicated generation, transmission and storage resources while assigning the required service costs to the large-load customer. The 600-MW storage contract gives the broader framework a disclosed asset component, but much of the physical scope remains undisclosed.
For the power and industrial supply chain, the next material updates would be specific generation-resource selections, battery-project location and interconnection details, regulatory filings and approvals, project budgets, schedules, and engineering or construction awards. Until then, the announcement should be read as NiSource’s disclosed long-term service and infrastructure framework—not as confirmation that all associated assets are permitted, under construction or operating.
