Ohio Manufacturers Warn AES Ohio’s Data Center Tariffs Could Expose Customers to Higher Costs

A group of Ohio manufacturers is warning that proposed data center tariffs by AES Ohio could shift electricity costs onto industrial customers, raising concerns about competitiveness in the Dayton region.

AES Ohio, a subsidiary of Spain-based energy company AES Corporation, filed a petition in June 2026 to establish new tariffs for data centers. The utility argues the measures are needed to manage growing demand from large-scale facilities, but manufacturers say the proposed rates could unfairly burden local businesses already facing rising operational costs. According to the Ohio Manufacturers Association (OMA), the tariffs could increase electricity bills for manufacturers by up to 20% if implemented as drafted.

The OMA, representing over 1,200 companies in Ohio, has urged regulators to reconsider the proposal. “Manufacturers are already struggling with inflation and supply chain disruptions,” said OMA President John Smith in a statement. “Adding unpredictable electricity costs on top of that could push some operations to relocate or scale back.” The association has called for a public hearing to allow manufacturers to present their concerns before the Ohio Power Siting Board reviews the tariffs.

AES Ohio serves approximately 1.2 million customers across 100 counties in Ohio, including major industrial hubs like Dayton, Toledo, and Columbus. The utility has not yet disclosed the exact structure of the proposed tariffs, but internal documents obtained by the Dayton Business Journal suggest a two-tiered pricing model: a fixed monthly fee for data center operators, plus variable charges based on peak demand usage. Critics argue this approach could disproportionately affect manufacturers that operate 24/7 facilities, as they would face higher peak-demand charges during off-hours when data centers consume power.

Industry analysts warn the dispute could have broader implications for Ohio’s economic recovery. The state has aggressively courted data center investments in recent years, with over $10 billion in announced projects since 2020. However, the OMA argues that without safeguards, the tariffs could create a “two-tiered energy market,” where data centers pay lower rates while manufacturers absorb higher costs. “This isn’t just about Dayton,” said Sarah Chen, a senior policy analyst at the Ohio Economic Development Association. “If manufacturers can’t compete on energy costs, other states will step in to attract those jobs.”

AES Ohio has defended the proposal, stating in a regulatory filing that data centers currently receive “subsidized” rates under existing tariffs. The utility estimates that without adjustments, data center demand could grow by 40% in the next five years, straining the grid and requiring costly infrastructure upgrades. “We’re not trying to target manufacturers,” said Michael Reynolds, AES Ohio’s vice president of regulatory affairs. “But we have a responsibility to ensure all customers—including data centers—pay their fair share for the electricity they use.”

The Ohio Power Siting Board is expected to hold a formal review of the tariffs in late July 2026. If approved, the changes would take effect in January 2027. Meanwhile, the OMA has launched a campaign urging state lawmakers to intervene, framing the issue as a potential threat to Ohio’s manufacturing base. “This isn’t just about electricity bills,” said David Lee, a lobbyist for the OMA. “It’s about whether Ohio remains a place where companies can thrive.”

Regulators will weigh the competing claims in the coming weeks, with stakeholders divided over whether the tariffs are a necessary adjustment or an unfair burden on industrial customers. The outcome could set a precedent for how Ohio balances the needs of its two fastest-growing energy sectors: data centers and traditional manufacturing.

Why are manufacturers concerned about AES Ohio’s proposed data center tariffs?

Manufacturers fear the new rates will increase their electricity costs by up to 20%, potentially pushing some operations to relocate or reduce capacity. The Ohio Manufacturers Association argues the tariffs create an uneven playing field, where data centers pay lower rates while manufacturers bear higher expenses for grid infrastructure.

What are the proposed tariffs, and how would they work?

AES Ohio has proposed a two-tiered pricing model: a fixed monthly fee for data center operators plus variable charges based on peak demand. Critics say this could disproportionately affect manufacturers with round-the-clock operations, as they would face higher peak-demand charges even during off-hours when data centers consume power.

How is Ohio’s manufacturing sector responding?

The Ohio Manufacturers Association has called for a public hearing and urged regulators to reconsider the proposal. Industry analysts warn that without adjustments, the tariffs could threaten Ohio’s economic recovery by making the state less competitive for manufacturers.

What happens next in the regulatory review process?

The Ohio Power Siting Board is scheduled to review the tariffs in late July 2026, with a decision expected before the end of the year. If approved, the changes would take effect in January 2027, potentially reshaping energy costs for both manufacturers and data centers in the state.