The American Clean Power Association reports that U.S. solar has officially overtaken wind as the… | Clean Energy Briefing — June 4, 2026

TODAY'S LEAD: The American Clean Power Association reports that U.S. solar has officially overtaken wind as the nation's largest clean power source, even as total capacity additions fell 17% year-over-year — a paradox that underscores how permitting bottlenecks and interconnection delays are throttling a sector with record demand.

KEY DEVELOPMENTS

Solar Surpasses Wind as Top U.S. Clean Source: Developers brought 6.4 GW of new utility-scale solar, wind, and storage online in Q1 2026, but a 17% year-over-year decline reveals deepening infrastructure bottlenecks even as the project pipeline surges. Read More: PV Magazine USA.
Seven States Sue Trump Over Wind Lease Buyout: A coalition of states is challenging the Trump administration's settlement with TotalEnergies to buy out an offshore wind lease, calling it an unlawful cancellation that undermines clean energy commitments. Read More: Utility Dive.
House Passes Bipartisan Geothermal Permitting Bill: The Geothermal Energy Advancement Act cleared the House with bipartisan support, streamlining permits for a baseload clean energy source that has drawn rare cross-aisle enthusiasm. Read More: Canary Media.
DTE Energy, LG Partner on 6 GWh Battery Buildout: Michigan's DTE Energy struck a major deal with LG to deploy 6 GWh of battery storage, positioning it to more than double its storage capacity to 2.9 GW by 2042. Read More: Utility Dive.
EnergyX Plans 'Battery Mecca' Lithium Facility in Texas: The lithium startup is developing a major domestic battery production hub in Texas, aiming to cut U.S. dependence on Chinese supply chains at a moment when trade tensions are reshaping clean energy manufacturing. Read More: Financial Times.

Solar & Storage

Solar energy's ascendance over wind as the largest source of clean power in the United States is now official, according to a. The industry brought 6.4 GW of new utility-scale solar, wind, and energy storage capacity online in Q1 2026, with solar dominating new installations. Texas continues to lead the nation with a staggering 96.4 GW of installed clean energy capacity — nearly a quarter of the entire U.S. total — cementing its status as the undisputed capital of American renewable energy regardless of the political headwinds blowing out of Washington. Read More: quarterly report from the American Clean Power Association.

But the headline numbers mask a growing crisis beneath the surface. Capacity additions dropped 17% compared to Q1 2025, with permitting delays and interconnection queue backlogs now stalling an estimated 59.5 GW of projects nationwide. That's a remarkable figure — roughly equivalent to the entire generating fleet of a mid-sized European country sitting in regulatory limbo. For developers who have secured financing and offtake agreements, the inability to physically connect projects to the grid is becoming an existential constraint.

On the project level, activity continues to push forward where it can. Avangrid completed construction of its 166 MWdc Tower Solar project in Oregon and connected it to the regional transmission grid. Meanwhile, European investor Qualitas Energy , signaling that international capital continues to flow into American solar assets despite policy uncertainty — a testament to the sheer economics of utility-scale solar in sun-rich markets. Read More: according to PV Tech, acquired a U.S. solar project.

In Houston, a novel business model is gaining traction. that installs rooftop solar and 40 kWh battery systems for homeowners at rates as low as $0.06 per kilowatt-hour. The company's real innovation lies in its aggregation strategy: it bundles customer batteries into a virtual power plant to provide grid services and generate additional revenue, keeping subscription costs low through vertical integration. In a deregulated Texas market plagued by volatile pricing and grid reliability concerns, the model could prove a compelling alternative to traditional utility service. Read More: Terra Energy launched a solar-plus-battery subscription service.

The battery storage sector, meanwhile, is scaling dramatically. DTE Energy's partnership with LG to deploy is among the largest utility-storage deals announced this year. By 2042, DTE expects to operate more than 2.9 GW of energy storage — a massive buildout that reflects the growing recognition among regulated utilities that storage is no longer optional but essential for grid reliability. And in Texas, lithium startup EnergyX is planning what it calls a — a major domestic production facility designed to reduce American dependence on Chinese lithium supply chains. The project aligns with the Trump administration's emphasis on energy independence and domestic manufacturing, potentially giving it political tailwinds that other clean energy initiatives lack. Read More: 6 GWh of battery storage, "Battery Mecca".

Wind Energy

The offshore wind sector remains mired in legal and political conflict. As first reported yesterday, seven states — New York, New Jersey, Connecticut, Maine, Massachusetts, Rhode Island, and Vermont — have over a lease buyout deal with TotalEnergies for an offshore wind project. The states argue the settlement constitutes an unlawful cancellation of the lease, effectively allowing the administration to dismantle offshore wind development through backroom financial arrangements rather than formal regulatory proceedings. Read More: filed suit against the Trump administration.

The lawsuit represents a significant escalation in the ongoing standoff between coastal states that have made binding clean energy commitments and a federal administration that has been openly hostile to offshore wind. This comes on the heels of a Boston court last week forcing GE Vernova to continue supplying turbines for the troubled Vineyard Wind project — another sign that the judicial system is increasingly becoming the arena where offshore wind's future will be decided. The ACP's Q1 report underscores the consequences: while solar and storage pipelines surge, wind development is dying down, with new onshore and offshore wind installations falling sharply as developers redirect capital toward technologies with less political risk.

Policy & Markets

In a rare display of bipartisan cooperation, the U.S. House passed the , legislation led by Colorado representatives that aims to streamline permitting and accelerate deployment of geothermal energy projects nationwide. Geothermal has emerged as one of the few clean energy technologies with genuine support on both sides of the aisle — its baseload reliability, small land footprint, and association with oil and gas drilling techniques give it appeal across the political spectrum. The bill's passage signals that even in a polarized Congress, there remains legislative space for clean energy when it's framed around reliability and domestic energy production. Read More: Geothermal Energy Advancement Act.

At the state level, New York finalized its 2027 budget with , which incentivizes residential rooftop and community solar installations. The budget also directs modernization of the utility interconnection process — a direct response to the same bottlenecks the ACP report flagged nationally. New York's move to tackle interconnection at the state level underscores a growing recognition that waiting for federal grid reform may be a losing strategy; states with aggressive clean energy targets are increasingly taking matters into their own hands. Read More: $200 million earmarked for the NY-Sun program.

Internationally, Brazil is preparing for after approving a new regulatory framework, a development that could open a significant new market for U.S. battery manufacturers and project developers looking to diversify beyond domestic uncertainty. Investors are already while flagging risks around regulatory execution and grid infrastructure. Read More: its first-ever energy storage auctions, mobilizing for the Brazilian auctions.

LOOKING AHEAD

Offshore Wind Litigation Timeline: Watch for early procedural rulings in the seven-state lawsuit against the Trump administration's TotalEnergies buyout — court scheduling decisions in the coming weeks will signal how quickly this case moves and whether an injunction could freeze the deal.
Interconnection Queue Reform Pressure: With 59.5 GW of projects stuck in permitting and interconnection limbo, expect FERC and state regulators to face intensifying pressure from developers and utilities for queue reform; several regional transmission organizations are considering emergency measures.
Geothermal Bill's Senate Path: The Geothermal Energy Advancement Act now moves to the Senate, where its bipartisan House support could accelerate passage — a potential rare clean energy win in a divided Congress.

TODAY'S QUICK ANSWERS

Q: What does the 17% drop in Q1 capacity additions mean for developers with projects in the pipeline?

A: The decline isn't a demand problem — it's an infrastructure bottleneck. With 59.5 GW stuck in interconnection queues and the solar pipeline actually surging, developers who secured grid connections early hold increasingly valuable assets. Those still waiting should expect 18-to-36-month delays in many regions and should be exploring state-level interconnection reforms, like New York's new budget provisions, as potential relief valves.

Q: Why does the DTE-LG 6 GWh battery deal matter beyond Michigan?

A: It signals that regulated utilities — not just merchant developers — are committing to storage at a scale that will reshape grid planning nationwide. When a traditional Midwest utility plans to more than double its storage to 2.9 GW by 2042, it creates long-term procurement certainty for battery manufacturers and validates storage as essential grid infrastructure rather than a niche technology. Expect similar announcements from other utilities facing coal retirements and rising demand.

Q: Should clean energy companies view the geothermal bill's passage as a model for advancing other technologies?

A: Absolutely. Geothermal succeeded because it was framed around baseload reliability and leveraged bipartisan appeal by connecting to oil and gas expertise. Clean energy advocates pushing storage, transmission, or even solar policy in this Congress should take note: legislation that emphasizes grid reliability, domestic manufacturing, and energy independence has a path forward — pure climate framing does not.

THE BOTTOM LINE: Solar's coronation as America's top clean energy source is undercut by the 59.5 GW of projects trapped in interconnection purgatory — solving the grid access crisis, not building more panels, is now the binding constraint on the U.S. energy transition.