Ohio Solar Plant Adds 120 MWac to Grid
The Border Basin facility, running on Stem's cloud controls, shows state-approved solar moving into commercial operation.
Updated on Nov. 3, 2026 in Energy
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Energix US has brought its 152-MWdc Border Basin solar plant in Hancock County, Ohio, online, a project with 120 MWac of AC capacity. The plant is an operating facility, not an announcement, and its control and monitoring systems were supplied by Stem.
Why it matters
Utility-scale solar in Ohio is moving from state siting approval to commercial operation, and the plant's software-driven control layer shows how grid-scale generation is increasingly managed through cloud analytics. Stem's role across design, hardware, and commissioning illustrates a shift toward integrated energy-software vendors on large solar sites.
The plant is rated at 152 MWdc and 120 MWac, a 1.27 DC-to-AC ratio that pairs more panel capacity with the inverter output. The site occupies 966 acres of a 1,378-acre project area, roughly 6.4 acres per MWdc, but no generation or performance results have been reported yet.
The players
Energix US
Energix US is the owner and developer of the Border Basin plant, part of a portfolio of solar projects built mainly in Virginia and Pennsylvania.
Stem
Stem is an energy-storage and software company whose PowerTrack platform runs the control, monitoring, and analytics layer for the plant.
Ohio Power Siting Board
The Ohio Power Siting Board is the state body that approved the facility and attached 44 conditions to its construction and operation.
The details
Solar plants convert sunlight into direct-current electricity through photovoltaic panels, and inverters convert that output to alternating current for the grid. At Border Basin, Stem's PowerTrack software runs the plant's control, data acquisition, and monitoring functions, while local SCADA (supervisory control and data acquisition, the industrial system that watches and commands equipment) and PJMnet integration connect the site to the regional grid operator. Stem also assembled control panels in its own shop, ran factory acceptance tests, and took part in utility witness testing before handing the plant to operators.
Timeline
Feb. 16, 2023: The Ohio Power Siting Board approved the 120-MW facility in Cass Township.
Nov. 3, 2026: Energix brought the Border Basin plant online.
Nov. 5, 2026: Stem reports third-quarter results after the market close.
The Tech Race
Border Basin extends the Ohio siting approval granted by the Ohio Power Siting Board in 2023 into operating capacity. Its software layer, run by Stem's PowerTrack platform that also supports 38 GW of solar, places it within a broader push by energy-software vendors to manage large solar fleets.
The plant feeds electricity into the PJM grid that serves Ohio, adding generation capacity for regional customers once it reaches commercial operation. Availability to individual households is not stated in the source, and the timeline for any rate or bill effect is not announced.
The takeaway
The Border Basin plant shows a Ohio siting approval converting into operating solar capacity managed by cloud-based controls. Watch Stem's Nov. 5 third-quarter report for whether PowerTrack deployments like this one drive its growth.
What happens next
Stem reports its third-quarter results after the market close on Nov. 5, 2026, which may include commentary on its PowerTrack deployments.
Further reading
For more on how states are permitting and building new generation, see Energy coverage across the region.
Live Poll
Should your community support building more large solar power plants nearby?
