2026 H1 Solar Industry Recap: Record Installations, Tariff Uncertainty, and Storage Dominance

Published June 30, 2026 — PES Supply News

The first half of 2026 will be remembered as a turning point for the U.S. solar industry. The nation crossed six million cumulative solar installations, solar-plus-storage captured 91% of all new grid capacity additions, and residential battery storage set quarterly records — all while the industry absorbed the sharpest federal tax-policy shift in a decade. For installers and contractors, the headline numbers tell only part of the story. Beneath the records, a "post-tax-credit world" is reshaping procurement, project economics, and the storage attachment decision.

This recap synthesizes the most consequential developments of 2026 H1 across installation data, IRA and tariff policy, battery storage, domestic content compliance, and interconnection reform. At PES Supply, we track these shifts across our 50,000+ SKUs from 169 authorized brands so that our customers can plan procurement and project pipelines with confidence.

Q1–Q2 2026 Installation Data: Records and a Residential Reset

The SEIA/Wood Mackenzie U.S. Solar Market Insight 2026 Q2 Report, released in June 2026, confirms that the United States installed 7.8 GWdc of new solar capacity in the first quarter of 2026 — a 27% decline year-over-year and a 42% drop from Q4 2025 ([Renewability.net](https://renewability.net/us-solar-installations-fall-27-in-q1-2026-as-tax-credit-cliff-approaches/)). Despite that quarterly pullback, the milestone headline stands: the country surpassed six million cumulative solar installations during H1 2026, an all-time high ([EnergyTools](https://energytools.pages.dev/blog/seia-q2-2026-solar-market-update/)).

SEIA reports that the national installed base now stands at 262 GWdc of direct-current solar capacity, enough to power 45 million homes ([pv magazine USA](https://pv-magazine-usa.com/2026/07/08/qualifying-for-solar-tax-credits-beyond-the-july-4th-deadline/)). Solar remained the leading source of new U.S. generating capacity for a fifth consecutive year, and solar-plus-storage represented 91% of all new capacity installed in Q1 2026 ([Barks Publications](https://www.barks.com/post/six-million-ways-to-fry)).

Segment Breakdown: Q1 2026

Segment	Q1 2026 Capacity	Year-over-Year Change
Total U.S. solar	7.8 GWdc	-27%
Utility-scale	5.9 GWdc	-34%
Residential	1,179 MWdc	+6%

Residential was the lone bright spot in Q1, up 6% year-over-year, though still down 15% from the prior quarter as homeowners who rushed to install ahead of the tax-credit deadline tapered off ([Renewability.net](https://renewability.net/us-solar-installations-fall-27-in-q1-2026-as-tax-credit-cliff-approaches/)). The residential market is now forecast to decline 18–21% for the full year 2026 before growth resumes in 2027 ([VA Horizon](https://www.vahorizon.site/solar/statistics/market/)).

Utility-scale contracted volumes, however, tell a different story. Contracts for utility-scale solar rose 15% year-over-year, fueled by technology companies securing power to meet surging AI-driven electricity demand ([Barks Publications](https://www.barks.com/post/six-million-ways-to-fry)). Republican-won states accounted for 74% of all solar capacity installed in Q1 2026, with Texas, Florida, Ohio, Indiana, Michigan, Arizona, and Mississippi ranking among the top ten states.

IRA Status and the Tax-Credit Cliff

The dominant policy story of 2026 H1 is the end of the Section 25D residential solar tax credit. Under the One Big Beautiful Bill Act (OBBBA), the residential federal tax credit expired on a hard cliff — with no phase-down — for any system installed on or after January 1, 2026 ([VA Horizon](https://www.vahorizon.site/solar/statistics/market/)). Cash and loan buyers now receive zero federal credit on a new residential system.

The OBBBA also tightened the timeline for commercial and utility-scale projects. Solar projects that began construction after July 4, 2026 must be placed in service by December 31, 2027, and Treasury Notice 2025-42 redefined "start of construction" for projects larger than 1.5 MW — removing the prior 5%-paid threshold ([pv magazine USA](https://pv-magazine-usa.com/2026/07/08/qualifying-for-solar-tax-credits-beyond-the-july-4th-deadline/)). The 2025 Year-in-Review report found these changes contributed to a 14% decline in installations in 2025 compared to 2024.

Wood Mackenzie's head of solar, Michelle Davis, summarized the outlook bluntly: "We are forecasting that U.S. solar additions will be flat over the next five years despite the need for more power supply in the U.S." ([Barks Publications](https://www.barks.com/post/six-million-ways-to-fry)). However, SEIA revised the industry-wide forecast upward as electricity demand continues to surge.

What the Policy Shift Means for Procurement

• TPO dominance: Third-party-ownership (lease and PPA) deals are projected to make up 65% of solar sales in 2026, up from 44% in 2025, as cash and loan buyers lost the federal credit ([VA Horizon](https://www.vahorizon.site/solar/statistics/market/)).
• Construction-start urgency: Projects racing to meet the July 4, 2026 construction-start deadline for ITC eligibility created a procurement surge in H1.
• Domestic content premium: Commercial solar systems claiming ITC incentives must source at least 40% of manufactured product value from non-FEOC suppliers as of January 2026 ([Energyscape Renewables](https://energyscaperenewables.com/post/commercial-solar-permitting-2026-guide/)).

Browse FEOC-compliant and domestic-content options in our solar panels and inverter catalogs.

Tariff Policy Shifts and Trade Uncertainty

Tariff policy remained in flux throughout H1 2026. The FEOC (Foreign Entity of Concern) framework continues to govern eligibility for the domestic content bonus and full ITC value, creating a "provenance premium" — U.S. buyers face higher prices for compliant modules even as global module prices sit at historic lows. The domestic content bonus has driven substantial expansion of U.S. manufacturing capacity, tracked through the DOE Solar Photovoltaic Manufacturing Map and SEIA Solar & Storage Supply Chain Dashboard.

For installers, the practical effect is longer lead times on compliant equipment and the need to verify country-of-origin documentation for every module, cell, and inverter on the bill of materials. Plan procurement for 7-10 business days delivery on stocked components and order early for projects requiring FEOC-compliant modules or domestic content certification.

Storage Dominance: Attachment Rates Climb Past 45%

The standout story of 2026 H1 is battery storage. The national residential solar-plus-storage attachment rate reached 45% in Q1 2026, up from 38% a year earlier and roughly 25% in 2024 ([Rewiring America](https://www.rewiringamerica.org/newsroom/press-releases/the-household-battery-boom-points-to-a-homegrown-energy-future)). The latest U.S. Energy Storage Monitor from Wood Mackenzie and the American Clean Power Association found that residential storage hit a record 1.3 GWh in Q1 2026, up 86% year-over-year.

Solar-Plus-Storage Attachment Rate Trend

Period	National Attachment Rate	Source
2024	~25%	SEIA/Wood Mackenzie
Q1 2025	38%	Wood Mackenzie
Q1 2026	45%	Wood Mackenzie / ACP

In leading markets, attachment rates are far higher. Southern California install data shows a 70% battery attachment rate, driven by NEM 3.0 economics that pay single-digit cents for exports while imports cost 34–58 cents per kWh ([OC Solar](https://ocsolar.com/resources/guides/nem-3-0-battery-math-real-socal-numbers)). The math is simple: a battery is the only device that converts cheap export compensation into valuable self-consumption.

Drivers of Storage Attachment

• Net billing tariffs: NEM 3.0 and similar programs reduce export compensation, making self-consumption via batteries economically essential.
• VPP revenue: Ongoing payments for grid participation create a recurring revenue stream that improves storage payback.
• Backup power value: Increasing frequency of grid outages and PSPS events drives consumer demand for resilience.
• Falling battery prices: Declining LFP cell pricing has narrowed the cost gap between solar-only and solar-plus-storage systems.

For installers, this means designing systems with storage from the outset rather than retrofitting later. Shop our battery storage and balance of system selections for integrated solar-plus-storage solutions.

Domestic Content Compliance in a Post-Credit World

Even as the residential tax credit ended, domestic content compliance remains critical for commercial and utility-scale projects claiming the full ITC under Sections 45Y and 48E. The 40% manufactured-product-value threshold from non-FEOC suppliers took effect in January 2026 ([Energyscape Renewables](https://energyscaperenewables.com/post/commercial-solar-permitting-2026-guide/)). Federal tax credits under these sections also require that 15% of total labor hours on projects over 1 MWac be performed by qualified apprentices.

The domestic manufacturing base has expanded substantially, making domestic content compliance more achievable than two years ago — though the supply chain remains internationally dependent for polysilicon and cells. Installers sourcing domestic-content-compliant equipment should verify BABA (Build America, Buy America) certification where applicable and confirm that module, cell, and inverter origins meet the project's specific compliance requirements.

FERC Interconnection Reform Progress

Interconnection remains a binding constraint on solar and storage deployment. Berkeley Lab's latest queue data show about 8,200 projects actively seeking grid interconnection at the end of 2025, representing 1,312 GW of generation and about 749 GW of storage ([pv magazine USA](https://pv-magazine-usa.com/2026/07/10/grid-operators-make-interconnection-progress-but-solar-and-storage-still-face-long-waits/)). A report prepared for Advanced Energy United by Grid Strategies and The Brattle Group found that each region has made meaningful progress over the last 18 months, but there is not yet strong evidence that interconnection speed has improved.

Key FERC Actions in H1 2026

Date	Action	Significance
June 9, 2026	FERC approved PJM Expedited Interconnection Track (EIT)	Fast-lane for 250+ MW shovel-ready projects; effective July 31, 2026
June 18, 2026	FERC issued show-cause orders to all 6 RTOs/ISOs	Directing large-load tariff reforms; 50 MW threshold
April 2026	FERC accepted PJM's revised Order 2023 compliance filing in part	Ongoing cluster-study process implementation

The PJM Expedited Interconnection Track (EIT), approved under Docket ER26-1563, allows PJM to review up to 10 interconnection requests per year for projects of at least 250 MW that can reach commercial operation within three years. PJM expects qualifying projects to execute a signed interconnection agreement within roughly 10 months, compared with the one- to two-year timeline typical of the standard queue ([Certrec](https://www.certrec.com/blog/ferc-approves-pjms-fast-track-interconnection-process-for-large-energy-projects/)).

FERC's June 18 show-cause orders, issued under Section 206 of the Federal Power Act, direct each of the six RTOs/ISOs to justify or rewrite their large-load tariffs — responding to surging data-center electricity demand and the need for "speed to power" ([JD Supra](https://www.jdsupra.com/legalnews/ferc-show-cause-orders-signal-broad-2937224/)). The orders set a 50 MW threshold and demand cost transparency so new large loads do not push grid-upgrade costs onto existing customers ([Stoel Rives LLP](https://www.stoel.com/insights/reports/energy-regulatory-updates/july-8-2026)).

What H1 2026 Means for Your Business

Design for Storage From Day One

With national attachment rates at 45% and exceeding 70% in leading markets, design new systems with storage integration in mind — even if the customer is not initially purchasing a battery. Pre-wire for storage, size the inverter appropriately, and leave physical space for future battery installation.

Navigate the Tax-Credit Transition

The residential credit is gone for cash and loan buyers, but third-party ownership structures preserve tax-equity benefits. Educate customers on lease and PPA options, and for commercial projects, ensure construction-start documentation is airtight to preserve ITC eligibility before the July 4, 2026 and December 31, 2027 deadlines.

Plan Procurement for Compliance and Lead Times

FEOC compliance, tariff uncertainty, and domestic content requirements mean longer lead times for compliant equipment. Verify country-of-origin documentation for every line item, and plan for 7-10 business days delivery on stocked components from PES Supply.

Track Interconnection Timelines

Interconnection remains the single biggest schedule risk for utility-scale projects. Factor cluster-study timelines, financial readiness deposits, and network-upgrade cost uncertainty into project financial models.

Conclusion

The first half of 2026 confirmed that the U.S. solar industry is operating in a fundamentally different policy environment than the one that drove its explosive growth from 2022 to 2024. The residential tax-credit cliff, FEOC-driven domestic content requirements, and persistent interconnection bottlenecks have tempered the growth curve — even as record installations, surging storage attachment, and AI-driven utility-scale demand point to a structurally expanding market.

Installers who adapt to the post-tax-credit world — by embracing storage as the default configuration, leveraging TPO structures, sourcing compliant equipment early, and designing for the new code and policy landscape — will be positioned to capture the opportunities this transformation creates. PES Supply is your partner in navigating this evolving market. With 50,000+ SKUs from 169 authorized brands, we offer the product breadth and industry expertise you need across solar panels, inverters, battery storage, racking and mounting, and balance of system categories.