FERC orders grid operators to justify large-load rules | Clean Energy Briefing — July 3, 2026

TODAY'S LEAD: The commission's show-cause action targets how RTOs handle data center and industrial interconnections, a signal that queue and planning reforms are coming whether operators volunteer them or not.

KEY DEVELOPMENTS

FERC Forces Grid Operators to Defend Load Rules: The Federal Energy Regulatory Commission issued show-cause orders requiring U.S. grid operators to explain their procedures for integrating large new loads — primarily data centers and industrial facilities drawing hundreds of megawatts — with. Read More: storage experts calling flexibility the central issue.
North Carolina Panel Kills Solar Tax Break: 's House Finance Committee voted to eliminate the 80% property tax exemption for new utility-scale solar installations starting July 1, 2027, a move that could raise project costs enough to. Read More: North Carolina, reshape the state's development pipeline.
New Jersey Passes Balcony Solar Law Unanimously: The Garden State Balcony Solar Act lets residents install portable solar devices up to 1,200 watts with no permits and no utility sign-off, making the. Read More: New Jersey, tenth state to enact plug-in solar rules.
Massachusetts Senate Targets $14B in Energy Savings: An omnibus energy bill passed the Senate with solar permitting reforms and procurement overhauls projected to. Read More: Massachusetts, save ratepayers $14 billion over a decade.
EVelution Breaks Ground on 28 MW Arizona Solar: EVelution Energy started construction on a 28 MW solar plant in Yuma County tied to a $450 million cobalt processing complex, routing excess generation to. Read More: battery storage or the grid.

Solar & Storage

The week's project news clusters around two themes that keep colliding: critical minerals and the grid's appetite for flexible capacity. In , EVelution Energy's 28 MW solar array near Tacna will feed a cobalt processing hub — the kind of facility the Trump administration has pushed to on-shore — with surplus electrons directed to batteries or sold wholesale. The $450 million complex is scheduled for completion across 2026 and 2027. For developers, the project is a template: pair solar with an industrial off-taker whose load profile justifies storage, and the economics pencil out even without a traditional utility PPA. Read More: Arizona.

Farther north, Avangrid filed plans for a 41 MW / 82 MWh battery storage project in Gilliam County adding to the Pacific Northwest's thin storage portfolio. The two-hour-duration system is modest by California or Texas standards, but , and battery projects there serve a different purpose: covering the gaps when river flows drop during summer heat events. Read More: Oregon, Oregon's grid still leans heavily on hydro.

Meanwhile, residential batteries are carving out a second life as grid-management tools. Utilities and aggregators are increasingly enrolling home battery systems into virtual power plants that dispatch stored energy during peak demand, effectively turning thousands of scattered Powerwalls and Enphase units into a single dispatchable resource. The trend matters for grid planners because it adds capacity without new transmission — a scarce commodity everywhere — and for battery manufacturers because it creates a revenue stream that. Read More: accelerates residential payback periods.

At the University of Alabama, SPOC Energy deployed a megawatt-scale DC microgrid at the Alabama Mobility and Power Center. The containerized system is designed as a test bed for DC-native power architectures — the kind of setup that could serve AI data centers, which lose meaningful energy converting between AC and DC multiple times inside a facility. It is a research installation, not a commercial project, but the data it produces could for the largest industrial loads now entering interconnection queues. Read More: influence how developers design behind-the-meter systems.

Policy & Markets

FERC's show-cause orders landed this week like a flare over the interconnection debate. The commission told grid operators — PJM, MISO, SPP, and others — to demonstrate that their existing tariffs adequately handle the flood of large-load requests, many from data center operators seeking 300 MW or more at a single point of interconnection. Storage industry voices framed the action in terms of flexibility: grids designed around predictable load growth cannot absorb sudden, lumpy demand without rethinking how they plan for and dispatch resources. For battery developers, the implication is direct. If RTOs must formalize processes for large loads, those processes will almost certainly include co-located or networked storage requirements, opening procurement doors that. Read More: don't exist under current tariff structures.

The orders also arrive against the backdrop of a parallel local fight. St. Charles, Missouri, voted to effectively ban large-scale data centers through zoning restrictions, joining a growing list of communities that see the facilities as threats to grid reliability and local power costs rather than economic engines. In Lexington, Kentucky, a zoning panel is considering new rules governing both. Developers watching these local actions should note the pattern: opposition to data centers and opposition to the renewable projects that would power them are rising in tandem, creating a pincer that can stall both. Read More: large-scale solar in agricultural zones and data center siting.

In North Carolina, the House Finance Committee's vote to strip the 80% property tax exemption for new utility-scale solar after July 1, 2027, sends a clear price signal. Existing projects would be grandfathered, but anything permitted after that date faces a dramatically different cost structure. Lawmakers debated a phased reduction, which would have given developers time to adjust pro formas, but opted for a hard cutoff. The bill now heads to the House Rules Committee. North Carolina ranks third nationally in installed solar capacity, and developers there are already contending with interconnection delays and rising equipment costs; removing the tax break could push marginal projects — particularly smaller arrays in rural counties where property taxes are a larger share of total cost —. Read More: below the threshold of viability.

On the brighter side for the solar industry, two Northeastern states moved to lower barriers. New Jersey's unanimous passage of the Garden State Balcony Solar Act allows portable solar devices up to 1,200 watts without permits or utility approval. The law follows Utah's 2025 pioneering statute, and New Jersey becomes the tenth state to adopt similar rules. Plug-in solar won't move utility-scale needle, but it does build the constituency of people who generate their own power — a political base that tends to support broader clean energy policy.

Massachusetts went further. The Senate's energy omnibus bill bundles residential solar permitting reform with sweeping procurement changes projected to save ratepayers $14 billion over ten years. In a state where electricity costs regularly exceed 25 cents per kilowatt-hour, the affordability framing is strategic: it lets lawmakers sell solar and storage expansion as consumer protection rather than climate policy. The bill still needs , but the unanimous chamber vote suggests broad support. Read More: House action and the governor's signature.

LOOKING AHEAD

North Carolina Solar Tax Bill Moves to Rules: The legislation eliminating the 80% property tax exemption for utility-scale solar heads to the House Rules Committee, where scheduling for a full floor vote will determine whether developers have weeks or months to respond.
FERC Show-Cause Responses Due: Grid operators must file responses to FERC's orders on large-load integration procedures — watch for RTOs proposing storage mandates or co-location requirements that could reshape procurement in PJM and MISO territories.
Massachusetts Energy Bill Awaits House Action: The Senate's $14 billion energy-savings omnibus now moves to the House, where solar permitting streamlining and procurement reforms face potential amendments from utility-aligned legislators.

TODAY'S QUICK ANSWERS

Q: What does FERC's show-cause action mean for battery storage developers?

A: Grid operators will likely need to formalize how they accommodate 200–500 MW single-point loads from data centers, and storage is the most deployable flexibility resource available. Developers positioned near major load pockets — northern Virginia, central Ohio, the Dallas–Fort Worth corridor — should watch RTO filings closely, because new tariff language could create mandatory storage procurement tied to large-load interconnection agreements.

Q: How much could North Carolina's tax exemption repeal add to utility-scale solar project costs?

A: The current 80% exemption effectively shields developers from the bulk of local property taxes on solar equipment. Eliminating it after July 2027 means new projects would pay full assessed value — in many rural North Carolina counties, that can add $3,000–$5,000 per MW per year, enough to erode returns on projects with thin margins and push some below financing thresholds.

Q: Why should developers pay attention to local data center bans like St. Charles, Missouri?

A: Data centers are among the largest prospective off-takers for new renewable generation. When municipalities block them through zoning, they don't just kill a construction project — they remove the load growth that would have justified new solar, storage, and transmission investment in that region. The trend of simultaneous opposition to both data centers and the renewables that serve them is creating no-build zones that shrink the map for developers.

THE BOTTOM LINE: From FERC's pressure on grid operators to North Carolina's looming tax hit to local zoning bans on data centers, the rules governing where and how clean energy gets built are shifting faster than many project timelines can absorb — and developers who aren't repricing risk county by county are already behind.