Construction has begun on the Flint Grid Project, a 200-megawatt, 1.06-gigawatt-hour battery energy storage system near Columbus, Ohio, marking the largest such installation ever built within the PJM Interconnection territory. The project targets a spring 2027 commercial operation date and is explicitly designed to serve the surging electricity demand from nearby data centers and industrial facilities, signaling how storage is becoming integral to meeting concentrated load growth in the Midwest.
PJM, the nation’s largest wholesale electricity market, has seen storage capacity expand rapidly in recent years, but the Flint Grid Project represents a step change in scale. At over one gigawatt-hour of energy capacity, the system can deliver its full rated output for more than five hours — a duration profile that aligns with the grid’s growing need for firm, dispatchable capacity during peak net-load periods. The project’s siting in Ohio is no accident; the state has emerged as a focal point for hyperscale data center development, drawing tens of gigawatts of proposed load that existing generation and transmission infrastructure cannot reliably serve without significant reinforcement.
The Flint Grid Project also highlights the evolving business model for standalone storage in organized markets. Rather than relying solely on capacity market payments or energy arbitrage, developers are increasingly anchoring projects to long-term contracts with large industrial and technology offtakers that require both reliability and sustainability commitments. This contracted revenue de-risks financing and allows projects to proceed at a scale that merchant economics alone might not yet support. For PJM, the addition of 200 megawatts of four-hour-plus storage improves resource adequacy metrics and provides fast-frequency response capabilities that become more valuable as inverter-based resources displace synchronous generation.
Ohio’s regulatory environment has proven conducive to storage deployment, with the state’s Public Utilities Commission and PJM’s interconnection reforms — particularly the transition to a cluster-based queue process — helping to clear a backlog that previously stalled projects for years. The Flint Grid Project benefited from this improved queue discipline, moving from application to groundbreaking on a timeline that would have been improbable a half-decade ago. Its progress will be watched closely by developers and market participants as a bellwether for whether the current wave of gigawatt-hour-scale storage can be delivered on schedule and on budget.
Read the full report at Energy Central.