Both projects sit within reach of three hyperscaler campuses. West Chicago, adjacent to PJM’s northern Illinois load zone, enacted a 180-day moratorium on new data centers and BESS on July 20, a permitting
Decision Focus
On August 7, Eolian broke ground on the 200 MW / 1.06 GWh Flint Grid battery energy storage system in Licking County, Ohio, adjacent to a completed Amazon AWS campus and two hyperscaler sites under construction from Meta and Google. Simultaneously, Veolia disclosed a contract to build a 350 MW microgrid paired with a 430 MWh BESS for an undisclosed data center in the same county, designed to disconnect that facility from the main grid entirely.
The signal here is not simply that storage is being built near data centers. It is that storage developers are capturing interconnection rights and capacity market accreditation first, then offering data center operators a queue bypass as a commercial product.
90-Second Brief
This week, eolian has started construction on what it describes as the largest battery energy storage system on the PJM grid footprint, a 5.3-hour duration asset that cleared more than half of all new battery storage capacity in the 2027/28 PJM Residual Capacity Auction. Veolia is simultaneously building a 350 MW off-grid microgrid for an unnamed data center in the same New Albany corridor. Both projects sit within reach of three hyperscaler campuses. West Chicago, adjacent to PJM’s northern Illinois load zone, enacted a 180-day moratorium on new data centers and BESS on July 20, a permitting counter-signal that could redirect development pipeline toward Ohio.
What Is Really Happening?
The Licking County concentration is not coincidental. Hyperscalers committed to northern Ohio years before interconnection timelines became the sector’s dominant constraint. Storage developers recognized the resulting geography: a dense cluster of creditworthy anchor load, limited available grid capacity, and a utility queue that cannot move fast enough to match expansion plans.
What has changed is the market structure around these assets. Flint Grid is described as the first large-scale BESS to qualify for the PJM capacity market, converting storage from a resilience hedge into a capacity-accredited asset with a multi-stream revenue stack. That accreditation makes the economics more reproducible and creates an incentive for other developers to position storage first, interconnection second, and data center offtake third.
Eolian’s January 2026 partnership with CyrusOne in Texas — where a new data center campus is being built using existing grid interconnection rights tied to Eolian’s Chisholm Grid BESS — confirms that the Ohio project is not isolated. The developer is systematically monetizing early-vintage interconnection rights as a product for operators who cannot wait through a multi-year queue.
Why It Matters for Global Heads of Data Center Energy
The conventional site development path — utility application, interconnection queue, substation construction — runs three to seven years in high-demand PJM markets. Flint Grid and the Eolian-CyrusOne Texas structure invert that sequence: the storage developer holds the queue position and the capacity accreditation, and the data center operator accesses committed power without competing for a new interconnection slot.
Veolia’s off-grid microgrid takes a different approach to the same problem. By integrating BESS, gas engines, and linear generators to cover 100% of load independently, the unnamed client eliminates exposure to locational marginal price volatility and grid congestion events in a corridor already under significant load pressure. The tradeoff is that fuel-sourced generation components introduce Scope 2 emissions exposure not addressed in available public disclosures, making compatibility with 24/7 CFE commitments difficult to assess without knowing the client’s sustainability accounting approach.
For energy heads managing multi-GW portfolios, the relevant question is sequencing: these projects succeed because the storage developer entered the interconnection queue years before AI-driven load growth became a headline issue. The window to replicate that advantage in new markets is narrowing.
Forward View
If PJM’s capacity market accreditation framework for BESS is extended to future projects under comparable terms, it will formalize a new intermediary class between utilities and data center operators — storage owners who sell queue access and capacity credits rather than electrons alone. Whether MISO and ERCOT move toward similar accreditation structures is worth tracking; either would accelerate the model beyond PJM’s footprint.
Eolian’s CEO has publicly called on policymakers to avoid undermining the regulatory conditions that support these long-lead investments. That statement implies the policy environment is not settled. Changes to competitive electricity market rules, capacity accreditation standards, or wholesale bidding protocols for storage could alter the economics of projects structured around this model before they reach commercial operation.
The West Chicago moratorium is the most immediate near-term signal to watch. A 180-day review covering both data centers and BESS in the Chicago metropolitan area introduces permitting uncertainty for one of PJM’s largest adjacent load zones. If it produces restrictive permanent zoning rather than an updated permitting framework, pipeline projects currently targeting Illinois sites may redirect toward Ohio, Indiana, and western Pennsylvania — compressing interconnection availability in markets that are already building fast.
What Is Still Uncertain
The identity and commercial terms of Veolia’s data center client are undisclosed, making it impossible to assess whether the off-grid model is financially replicable or depends on a specific creditworthy anchor tenant with unusual risk tolerance. The gas and linear generator components introduce fuel cost, supply, and emissions variables that public statements do not address.
Whether PJM will maintain or extend the capacity market treatment that Flint Grid received is not confirmed. The CEO’s public call for policy stability suggests the regulatory foundation is contested rather than locked in. The West Chicago moratorium outcome also remains open: it could expire without new rules, produce workable zoning guidelines, or establish a restrictive template that spreads to neighboring municipalities across the northern Illinois corridor.
One Question for Your Team
In which of our active interconnection queue markets do BESS developers with existing grid rights offer a demonstrably faster path to committed capacity than our current utility application pipeline — and have we modeled that comparison as a formal alternative for our next three site decisions?
Sources
- Ess-news — Eolian starts building 1 GWh battery project for PJM data centers in Ohio (Link)
