Energy · Deep dive

First Solar

The last American solar manufacturer at scale — a $25B+ maker of cadmium-telluride thin-film panels that skipped the crystalline-silicon race China won, and now rides tariffs and IRA credits to fat margins while a $13.6B backlog quietly shrinks.

well positioned

A tariff wall and IRA 45X credits have handed First Solar the one thing no Chinese rival can copy — a protected, high-margin US utility market and a proprietary non-silicon technology — even as a shrinking backlog and total policy dependency keep the downside real.

My take ★★ Very interesting ★ Interesting − Maybe ✗ Not interesting

Snapshot

First Solar is the largest solar manufacturer in the United States and the only Western maker at true gigawatt scale — and it got there by refusing to play the game China won. Instead of crystalline-silicon panels, it makes cadmium-telluride (CdTe) thin-film modules, a fundamentally different, glass-based technology it controls end to end. That contrarian bet, plus US tariffs on Chinese silicon and the IRA’s 45X manufacturing tax credit, has produced eye-watering economics: gross margin hit 57% in Q2 2026, on a contracted backlog of ~45.1 GW worth ~$13.6 billion as of June 30, 2026. Market cap has swung between ~$24 billion and ~$29 billion across 2025-2026. But the same policy scaffolding that lifted it is its biggest risk, and beneath the margins the backlog has been thinning through customer de-bookings — the tension that defines the case.

Founding story

First Solar’s DNA is glass, not silicon. In 1984 Harold McMaster, an Ohio glass-industry inventor, founded Glasstech Solar; after early work on amorphous silicon he pivoted to cadmium telluride and, in 1990, founded Solar Cells, Inc. in Toledo. His insight was that a solar panel could be made the way coated architectural glass is made — by depositing a microscopically thin semiconductor layer onto a moving pane at high throughput — rather than by slicing and wiring wafers like a chip fab. That process bet is still the company’s core.

The company became First Solar in February 1999, when True North Partners — the private-equity vehicle Ahearn had co-founded with Walmart heir John T. Walton in 1996 — bought Solar Cells, Inc. and recapitalized it. Ahearn, an Arizona lawyer turned investor, was the operator; Walton the patience and the checkbook, funding a business that lost money for years before it worked. Ahearn ran First Solar as CEO from 2000 to 2009, scaled manufacturing in Perrysburg, Ohio, and took it public on NASDAQ in November 2006, raising roughly $400 million. Walton died in a 2005 plane crash before seeing it, but the family’s holding entities stayed major shareholders well into the public era. First Solar is now headquartered in Tempe, Arizona, and ~94% institutionally owned, BlackRock (~15%) and Vanguard (~8.7%) the largest holders as of 2025.

How it works

The physics is what makes First Solar unusual. A crystalline-silicon panel starts with polysilicon, melted into ingots, sawn into wafers, doped and assembled cell-by-cell — an energy-intensive, multi-step chain China has driven down the cost curve for two decades. First Solar instead deposits a cadmium-telluride absorber only ~3-5 micrometers thick — about one-tenth a human hair — onto a sheet of glass, paired with a thin cadmium-sulfide layer to form the p-n junction. The whole stack is applied on a continuous, automated coating line measured in seconds per plate, not the days a silicon wafer takes to travel its supply chain.

The consequences matter to a utility buyer. CdTe uses far less semiconductor material per watt, so it is less exposed to polysilicon price swings, and it performs better in heat and diffuse light — real-world energy yield can beat a nameplate-equivalent silicon panel in hot desert build-outs. Because First Solar runs its own material supply chain and fabs, it depends on no Chinese wafers — the single fact that makes it eligible, unlike its silicon rivals, for the strictest US domestic-content rules. The trade-off is efficiency: CdTe cell efficiency lags the best silicon, though First Solar targets ~25% cell entitlement by 2025 and pathways toward 28% by 2030. For utility ground mounts, where land is cheap, that gap matters less than cost-per-kilowatt-hour and supply security.

Product and business overview

First Solar sells one thing: utility-scale modules, currently the Series 7 (and legacy Series 6), large-format CdTe panels for ground-mounted power plants. It barely touches residential or commercial rooftop, and it exited project development years ago to be a pure manufacturer. Its differentiation is packaged as “Made in America, for America” — domestic modules that qualify buyers for IRA bonus credits — with the same play localized in India. The product carries a limited workmanship warranty of up to 12.5 years and a power-output warranty up to 30 years.

The manufacturing footprint is the real asset. After the Louisiana plant started in Q3 2025, global nameplate hit ~23.5 GW across the US, India, Vietnam and Malaysia. Domestically it runs three Ohio sites (~7 GW combined), a $1.1 billion Alabama plant (3.5 GW, September 2024) and the $1.1 billion Louisiana plant (3.5 GW), targeting ~14 GW US and ~25 GW global by end-2026; India adds ~3.3 GW. That domestic base is what a Chinese competitor cannot replicate under current trade law.

Business model and pricing

First Solar books revenue by shipping modules against long-dated, take-or-pay contracts — utilities and developers reserve years of output at fixed prices, which is why “backlog” is the most-watched metric. Its US bookings ASP was ~$0.364 per watt for one gigawatt booked (including CURE attribute adjusters), well above global spot silicon prices, which collapsed toward and below $0.10/watt during the 2024-2025 glut. That premium is policy-enabled, not market-clearing: buyers pay up for domestic content that unlocks their own tax credits.

The other revenue lever is the 45X production credit itself, which pays per watt produced. First Solar monetizes it by transferring credits for cash — one 2025 transaction sold $311.8 million of 45X credits — converting a tax asset into expansion capital. This is why margins are extraordinary for a hardware maker (40% in Q4 2025, 57% in Q2 2026): a large slice of profit is a government subsidy, not classic pricing power. Management guided FY2026 gross margin to ~49.5%. Strip out 45X and the underlying margin is far thinner — the central bear-case point.

Traction over time

The shape is clear: a money-losing, volatile hardware maker before the IRA (2021-2022), transformed into a high-margin cash machine after 2023. But 2025 exposed the crack. Full-year 2025 gross bookings were only 7.4 GW while de-bookings — customers terminating contracts, largely under breach clauses — hit 8.3 GW, netting about -0.9 GW. The backlog fell from a prior peak above 80 GW to 50.1 GW at year-end 2025 and 45.1 GW by mid-2026. Market cap swung with the crosscurrents, ~$24.1B (October 2025) to ~$28.5B (November 2025) and ~$25-29B into 2026.

Market analysis

The demand backdrop is enormous and, for now, structurally favorable. The US solar market was valued around $56.2 billion in 2025 (Ken Research), and the US added ~43 GW of new solar in 2025 — the fifth straight year as the top source of new generating capacity (SEIA). Utility-scale plants — First Solar’s entire market — were ~73% of that. Cumulative US solar is projected to nearly triple from ~279 GWdc at year-end 2025 to ~769 GWdc by 2036, implying 40+ GWdc of additions a year. The utility-scale market specifically was pegged near $80.3 billion in 2025, growing toward $112.5 billion by 2031.

The structural force underneath is electricity demand from data centers and AI, which has made utilities aggressive buyers of the cheapest, fastest-to-deploy generation — solar. Layered on top is a deliberate US policy architecture: tariffs and anti-dumping duties on Chinese and Southeast-Asian silicon plus IRA domestic-content bonuses, engineered to reserve the market for domestic makers, of which First Solar is the largest beneficiary. The risk in the same market is that the premium is political — a change in tariff or credit rules resets the demand curve overnight.

Competitive intel

Globally, First Solar is a minnow — roughly 2% of worldwide module shipments — in an industry led by China’s JinkoSolar (~13%), with LONGi, Trina and JA Solar around 11% each; the Chinese top four alone shipped ~58% of the ~536 GW China exported in 2025 (see sidebar for the full set). On pure cost per watt, First Solar loses to all of them, and the 2024-2025 oversupply glut pushed silicon modules to or below cash cost, dragging even LONGi into losses. But that global scoreboard is the wrong one. In the US utility market, tariffs, AD/CVD duties and IRA domestic-content rules largely lock the Chinese majors out, and First Solar’s non-silicon, fully domestic supply chain makes it the default choice for developers chasing bonus credits.

The competitor that actually threatens the moat is Hanwha Qcells, building an integrated ingot-to-module silicon supply chain in Georgia expressly to capture the same 45X credits and domestic-content premium — the one rival attacking First Solar’s protected position rather than just its price. Canadian Solar competes for the developer relationship, and trackers like Nextracker and Array are adjacencies whose order books read through to First Solar’s demand. Where First Solar wins: a differentiated technology no rival can copy without licensing, a years-long domestic head start, and heat-climate yield. Where it is exposed: a subscale, single-technology, single-market bet in an industry defined by Chinese scale.

History and evolution

• 1990 — Harold McMaster founds Solar Cells, Inc. in Toledo, Ohio, committing to CdTe-on-glass.
• Feb 1999 — True North Partners (Ahearn, John Walton) buys the company and reincorporates it as First Solar.
• Nov 2006 — IPO on NASDAQ (FSLR), raising ~$400M after scaling Perrysburg, Ohio past 60 MW/yr; later a clean-energy darling.
• 2009 — Cumulative shipments pass 1 GW; Malaysia chosen as low-cost hub; Ahearn steps down as CEO.
• 2011-2012 — Solar-crash years: silicon price collapse and Solyndra-era bankruptcies crush thin-film economics; First Solar restructures.
• 2013 — Acquires TetraSun (April) to hedge into high-efficiency silicon and buys GE’s CdTe IP (August) for 1.75M shares (~$83.8M).
• 2016 — Abandons the TetraSun silicon detour, doubles down on CdTe, and skips Series 5 to leap to a next-gen product.
• 2022 — IRA passes; the 45X credit rewrites the economics. A small net loss ($0.41/share) that “foundational” year amid ramp costs.
• Sept 2024 — Opens $1.1B Alabama plant (3.5 GW); in Q4 discloses Series 7 manufacturing defects in 2023-2024 modules.
• 2025 — Louisiana plant ($1.1B, 3.5 GW) starts in Q3; global nameplate hits ~23.5 GW; net de-bookings of -0.9 GW dent the backlog.
• 2026 — Q2 gross margin hits 57%, but FY2026 revenue guidance of $4.9-5.2B lands ~$1B below the Street; Jefferies and Baird downgrade.

What people say

The case for. Bulls point to numbers rare in hardware: 40-57% gross margins across late 2025 into 2026, $1.6 billion of 2025 operating income, and a multi-year backlog worth ~$13.6 billion. The domestic-manufacturing moat is real and legally reinforced — First Solar is the cleanest way to own the US reshoring-plus-energy-transition theme, and AI-driven power demand keeps utilities buying. Its CdTe technology is genuinely proprietary, sidestepping the Chinese silicon glut, with a real heat-climate yield edge in the desert Southwest. GLJ Research upgraded the stock in 2026 as de-bookings decelerated (Q1 2026 de-bookings fell ~97% versus Q4 2025), and management calls the balance sheet strong enough to self-fund expansion.

The complaints. The bear case is sharp. First, policy dependency: a large share of profit is the 45X credit, and the 2025 One Big Beautiful Bill Act (Section 70514) tightened domestic-content and “prohibited foreign entity” rules and began phasing credits — any further rollback under the Trump administration hits earnings directly. Second, the backlog is shrinking: 8.3 GW of 2024-2025 de-bookings, net -0.9 GW for 2025, down from >80 GW toward 45 GW — critics (a GuruFocus/Investing.com thesis among them) argue credit income is masking backlog depletion. Third, execution wobbles: the Q4 2024 Series 7 defect disclosure (premature power loss in 2023-2024 modules) carried a $50-100 million warranty reserve plus Alabama ramp charges, denting the quality story. Fourth, the FY2026 revenue guide of $4.9-5.2B missed the Street by ~$1 billion, implying flat-to-negative growth, drawing Jefferies and Baird downgrades. It remains a ~2%-global-share, single-technology maker whose premium exists only because Washington walled off its market.

Outlook: well positioned or at risk?

Well-positioned — but as a policy-protected champion, not a free-market winner, and the distinction is the whole risk. First Solar owns the one asset its far larger Chinese rivals cannot buy or copy: a fully domestic, non-silicon supply chain that makes it the default supplier to a US utility market deliberately fenced off by tariffs and IRA credits. That moat is producing 50%-plus gross margins, a multibillion-dollar backlog, and a balance sheet strong enough to self-fund a doubling of US capacity by 2026. Against a structural tailwind — AI power demand, 40+ GW of annual US solar additions, utility-scale as the cheapest new generation — a differentiated, protected, high-margin domestic manufacturer is a genuinely strong position.

The reason to keep the verdict honest rather than triumphant is that every pillar of the thesis is political or contractual. Strip 45X and margins compress toward commodity levels; loosen the tariff wall and the Chinese cost advantage floods back; and the backlog — the supposed proof of durable demand — de-booked by 8.3 GW in a single year and keeps falling. The Series 7 defect and sub-consensus 2026 guidance show a company that can still stumble with the wind at its back. What confirms the bull case: bookings outpacing de-bookings for consecutive quarters, rebuilding the backlog above 50 GW, and customers paying the domestic premium as credits phase down. What breaks it: a material rollback of 45X or the tariff regime, continued net de-bookings, or a second quality event. On balance the moat is real and holding and the downside is well flagged — First Solar enters 2026 well-positioned, with an asterisk reading “so long as Washington keeps the wall up.”

How a challenger would attack it

Build silicon inside the wall. First Solar’s premium — ~$0.364/watt US ASP against sub-$0.10 global silicon spot — is a policy arbitrage, and the attack is to qualify for the same 45X credits and domestic-content bonuses with a technology that beats CdTe on efficiency. That is precisely Hanwha Qcells’ Georgia ingot-to-module play, and a challenger extends it: fully domestic TOPCon at scale erases First Solar’s “only non-Chinese supply chain” trump card while offering utilities higher nameplate efficiency per acre. The de-booking record is the demand-side opening — 8.3 GW of terminations in a year, backlog down from 80+ GW toward 45 GW, means developers already walk from First Solar contracts when alternatives appear; a credible domestic silicon supplier gives every remaining backlog customer a renegotiation lever. The quality file helps: the Series 7 defect with its $50-100M warranty reserve, plus Alabama ramp charges, hands a challenger the reliability pitch against a single-technology maker whose 12.5-year workmanship warranty must hold for utility financiers. And First Solar’s one-product concentration — pure utility ground-mount, no residential, no commercial, no development arm — means the attacker can subsidize its utility assault from segments First Solar doesn’t touch. The FY2026 guide already implying flat growth, the moat is only as wide as the tariff wall, and the wall isn’t First Solar’s to defend.

Same playbook, new buyer

Run the protected-manufacturer playbook where other walls are going up. First Solar’s real invention is the business model: a proprietary non-commodity technology plus a trade-protected home market plus per-unit production credits, sold on supply security rather than price. That template transfers to any jurisdiction erecting its own barriers against Chinese modules — First Solar already proved the localization in India (~3.3 GW), but Europe’s carbon-border and resilience push, Brazil, and the Gulf states all want domestic solar manufacturing and have no First Solar equivalent; a CdTe licensee or an independent thin-film player could claim those subsidy regimes years before First Solar, which is committed to ~14 GW of US capacity and self-funding discipline, diversifies again. The second shift is segment: First Solar deliberately ignores residential and commercial rooftop, yet the same “Made in USA, credit-qualified” pitch commands a premium there — Qcells serves it, nobody serves it with thin film’s heat-yield story in the Sun Belt. Third, the buyer inside the buyer: data-center operators signing their own PPAs increasingly want supply-chain-audited, non-Chinese hardware as a procurement policy, a security-of-supply sale a smaller manufacturer can make directly to hyperscalers rather than through developers. First Solar’s take-or-pay, utility-only contracting machine isn’t built for any of these buyers — and retooling it would mean abandoning the concentration that makes its margins legible.

Sources and further reading

• First Solar — Wikipedia (company history and founding) (Wikipedia, 2026)
• First Solar Inc (FSLR) Q4 2025 Earnings Call Highlights: Record Sales and Strategic Expansion (Yahoo Finance / GuruFocus, February 2026)
• First Solar Q2 2026 slides show 57% margin, $13.6B backlog (Investing.com, 2026)
• First Solar hit by manufacturing issues, terminated contracts in Q3 (Utility Dive, October 2024)
• First Solar Opens $1.1 Billion Louisiana Factory, Adding 3.5 GW Capacity (SolarQuarter, November 2025)
• First Solar sells US$311.8 million in 45X manufacturing tax credits (PV Tech, 2025)
• First Solar: Tax Credit Dependency Masking Backlog Depletion (Investing.com / GuruFocus, 2025)
• Jinko edges past Longi in first-half solar shipments as TOPCon dominates (pv magazine, August 2025)
• Solar Market Insight Report 2025 Year in Review (SEIA, 2026)
• Our Technology: CadTel — how CdTe thin-film works (First Solar, 2025)