Solmar Insights
The PJM Interconnection has signaled the next stage for SoftBank Group’s massive AI data center investment in southern Ohio, filing with federal regulators to study roughly 10 GW of new data center load and 10.2 GW of gas-fired generation as part of a process tailored to major state-backed energy agreements. The project, known as “Flagship,” features new high-voltage transmission from AEP Ohio and is tied to a $550 billion US-Japan trade accord.
Key figures
10 GW projected AI data center load
10.2 GW new gas-fired generation
Three 765-kV transmission lines by AEP Ohio
$33 billion for gas-fired generation
State agreement approach in PJM
PJM’s decision to assess the Flagship project comes through a “state agreement approach” framework, which is designed to address projects driven by special agreements and state energy policies. This mechanism enables PJM to coordinate with state actors and market participants on projects that fall outside the typical interconnection and load addition queue process, helping facilitate unique or large-scale investments critical to regional or national economic priorities.
The approach is notable as PJM and other grid operators contend with accelerating demand from hyperscale data centers and AI infrastructure. This framework provides a pathway for integrating the required generation and load, like SoftBank’s 10 GW of new AI compute in Ohio, in coordination with long-range transmission planning and regulatory oversight.
By filing the study agreement at the Federal Energy Regulatory Commission (FERC), PJM positions itself to manage the combined transmission and generation implications within an integrated regulatory review, as encouraged by FERC in recent guidance on large load and generation interconnects.
Flagship project design and scope
The Flagship initiative was first announced by the White House in February as part of a larger $550 billion trade accord with Japan. Central to the effort is the development of a high-capacity data center complex requiring approximately 10 GW of power, representing one of the most significant data center loads announced in PJM to date.
The build-out features around 10.2 GW of new gas-fired generation, planned for phased commissioning by SB Energy, a SoftBank company, through 2032. The project also includes three new 765-kilovolt transmission lines and associated infrastructure, which are slated for construction by AEP Ohio, underscoring the grid modernization and capacity expansion needed to support both compute and generation additions.
Most of the Flagship footprint is planned for the U.S. Department of Energy’s Portsmouth Gaseous Diffusion Plant site in Pike County, a former uranium enrichment facility, with some new gas generation located 30 miles away. This redevelopment repurposes longstanding federal energy property for emerging data and compute needs, blending federal and private efforts.
Transmission buildout and interconnection mechanics
AEP Ohio’s role in building three new 765-kV transmission lines marks a critical infrastructure upgrade in southern Ohio. These lines are essential for delivering the bulk power needed by the Flagship data centers and integrating up to 10.2 GW of new gas generation into the grid.
The project’s initial phase, an 800 MW load served under a special AEP Ohio data center tariff, will precede the main bulk of the buildout. The PJM study agreement submitted to FERC covers an incremental 9.6 GW of data center demand and the corresponding generation in a planned, phased development. Such transmission expansion will require close coordination among AEP, PJM, and the state to navigate siting, right-of-way, and grid stability issues specific to ultra-large, single-customer loads.
By managing transmission, generation, and load expansion under an integrated state agreement, PJM can align major grid investments with predictable siting and energy supply outcomes, reducing uncertainties for institutional developers and investors.
Market and investment implications
PJM’s review of SoftBank’s project under the state agreement approach is significant for digital infrastructure buyers, power plant investors, and anyone in the transmission planning ecosystem. The scale, especially over 10 GW of new load and generation, is unprecedented for a single initiative in the PJM footprint, highlighting how hyperscale compute demand is now central to long-range power sector planning.
The $33 billion earmarked for gas generation suggests a commitment to firm, dispatchable power to backstop high-reliability AI compute needs, impacting future capacity, fuel procurement, and carbon policy discussions. The development could become a template for similar state-federal agreements as more data center clusters seek co-located generation and purpose-built high-voltage transmission infrastructure.
Institutional capital, utility planners, and policy stakeholders will closely observe the project structure and regulatory handling as it progresses through PJM’s and FERC’s review pipelines, with immediate implications for siting, tariff design, and investment allocation across energy infrastructure asset classes.
What this means for buyers
Transmission, power, and data center capacity in PJM’s Ohio region could see major shifts as SoftBank’s 10 GW data center and 10.2 GW generation plan advances under the state agreement approach. The PJM filing to FERC introduces a new review process for integrating ultra-large, utility-backed loads and generation with dedicated 765-kV transmission. Institutional buyers tracking these regulatory signals may adjust asset acquisition, capacity contracts, or site diligence in Ohio this quarter based on project timelines and new grid investment triggers.
Reporting via the original publisher
