Eaton Closes Acquisition of Resilient Power Systems to Bring Medium-Voltage Solid-State Transformers In-House

Eaton Corporation completed its acquisition of Resilient Power Systems Inc. in August 2025, bringing one of the leading US solid-state transformer (SST) developers in-house. Industry estimates place the transaction value near $86 million. The deal is the most consequential SST industry consolidation event of the year and positions Eaton to ship medium-voltage SST products directly to data center, EV charging, and battery storage customers without third-party dependency.

Resilient Power Systems, based in Atlanta, was founded by alumni of Georgia Tech’s power electronics program led by Professor Deepak Divan. The company spent the better part of a decade developing a medium-voltage SST architecture aimed at three distinct applications: data center MV-to-LV conversion, EV megawatt charging interconnect, and battery energy storage system (BESS) grid interface. Each of these markets is also a stated Eaton priority.

The strategic logic for Eaton is straightforward. The company committed in December 2021 to a US Department of Energy agreement to develop low-cost fast-charging SST infrastructure within a three-year window. By late 2024 it was clear that internal development would not deliver against that commitment on schedule. Acquiring Resilient Power Systems compresses years of organic development into a single transaction.

Eaton has not disclosed a public roadmap for the integrated SST product line, but industry analysts at MarketsandMarkets identified four near-term product targets: a medium-voltage SST for hyperscale data centers, a multiport SST aligned with the OpenCompute Mount Diablo architecture, an EV megawatt charging interconnect, and a BESS-tied SST. A 2.5 MW MV-SST demonstration at the National University of Singapore, executed jointly with Hitachi Energy, is the first public-reference deployment.

The acquisition fits a broader pattern. ABB Ltd. announced a strategic equity investment in DG Matrix in March 2025; Hitachi Energy committed an additional $1.5 billion in April 2025 for transformer and SST capacity in Finland, Germany, and the United States. The three largest established transformer manufacturers in the western market are each on a different path to SST commercialization. Eaton has chosen acquisition.

Why It Matters

Data center, EV charging, and battery storage buyers planning SST-based procurements over the next 24 months should factor in vendor consolidation risk: the Eaton transaction reduces the number of independent US SST developers by one, and a second similar deal would leave the market with three serious vendors. That concentration matters when negotiating service terms, spare-parts pricing, and second-source obligations.

Critical Perspective

The Eaton-Resilient acquisition is the most consequential SST consolidation event of 2025, but the strategic rationale cuts both ways. Eaton’s reported $86 million payment is small for a company of Eaton’s size, which signals that Resilient was not yet generating enough run-rate revenue to support a larger valuation, despite a decade of development. The deal closes a competitive risk for Eaton (a credible US SST startup developing for data centers and EV charging) while quietly absorbing the engineering team that Eaton would otherwise have had to staff from scratch. Coverage that frames the deal as proof of SST product-market fit overlooks the alternative reading: a top-tier electrical OEM bought a leading US SST developer for the price of a single year of senior engineering payroll, which is closer to an aqui-hire than a market validation. Procurement officers reading vendor pitch decks that cite the Eaton-Resilient transaction as evidence of SST scale should note that Eaton has not yet disclosed Resilient-line product shipments and has not published medium-voltage SST efficiency numbers under independently witnessed test conditions.

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