FSLR Solar manufacturing · Clean energy · U.S. manufacturing · Industrial policy · Thesis updated July 19, 2026

Policy power, but bookings are fading

First Solar is a rare large U.S.-based solar manufacturer, built around CdTe thin-film modules instead of silicon panels.
Q1 2026 net sales rose 23.6% to $1.0 billion, helped by a 30.9% increase in modules sold to third parties.
Gross margin improved to 46.6% from 40.8%, mainly from lower logistics costs and more Section 45X-qualified U.S. modules.
The concern is the future order book: contracted backlog fell to $14.4 billion for 47.9 GW, down from earlier levels.
The balance sheet is a strength, with $2.36 billion of cash and cash equivalents against $425.8 million of debt principal at March 31, 2026.

01 Running thesis

Great margins, weaker bookings

First Solar is one of the clearest winners from U.S. policy that favors domestic solar supply chains. Its modules do not use the standard Chinese-linked crystalline silicon supply chain. That matters because U.S. tax credits, tariffs, and foreign-entity rules are pushing many buyers toward domestic and non-Chinese sources.

The latest quarter gave real proof of that earnings power. Q1 2026 net sales were $1.0 billion, up 23.6% from the prior year. Gross margin rose to 46.6%, helped by lower logistics costs and a higher mix of modules that qualify for Section 45X manufacturing credits.

The harder part is demand visibility. Backlog fell to $14.4 billion for 47.9 GW as of March 31, 2026. That is still a large book of future work, but the steady decline means new bookings are not fully replacing revenue being recognized.

The stock story is now balanced. The bull case is policy-backed manufacturing, strong margins, a large backlog, and possible upside from First Solar's ITC Section 337 case against TOPCon importers. The bear case is that policy support could shrink, bookings could keep falling, India mix could pressure average selling price, and tellurium supply could become harder to secure.

Apr 2026→Q1 2026 showed much stronger profitability, with gross margin rising to 46.6%. The offset was another backlog decline, to $14.4 billion for 47.9 GW.

Apr 2026▲The product story improved with CuRe ramping in Perrysburg and a planned perovskite pilot line of up to 1 GW in 2027. First Solar also pressed its IP case through an ITC Section 337 investigation.

Feb 2026▼The 2025 Form 10-K raised policy and supply chain risk. The OBBBA clouded long-term clean energy credits, and China export controls made tellurium a clearer risk.

Oct 2025▼Backlog fell to $16.4 billion for 53.7 GW, while gross margin compressed to 38.3%. New India tariffs also added pressure to the international footprint.

Jul 2025▼Backlog slipped to $18.5 billion for 61.9 GW, and margin pressure from logistics, storage, and U.S. production mix became more visible. The OBBBA made the policy risk more specific.

Apr 2025→The core IRA and domestic manufacturing thesis held, but backlog moved down to $19.8 billion for 66.1 GW. Management also flagged possible Southeast Asia production cuts.

Feb 2025▼The 2024 Form 10-K added tellurium export controls as a new supply risk and quantified Series 7 manufacturing issues. Backlog was updated to $20.5 billion for 68.5 GW.

Oct 2024→The initial thesis centered on First Solar as a U.S. solar manufacturing winner with a large contracted backlog. The main early risk was a Series 7 module defect.

02 Business model

Factories sell the watts

First Solar designs, makes, and sells solar modules. A module is the panel-like unit that turns sunlight into electricity. Its main customers are system developers, independent power producers, utilities, commercial and industrial companies, and large corporate energy buyers.

The company usually sells modules on a per-watt basis under long-term supply agreements. That gives revenue visibility when contracts hold. It also means pricing, volume, delivery timing, and contract changes all matter.

Its edge comes from proprietary CdTe thin-film technology, large factories in the Western Hemisphere, and U.S. production credits. Section 45X credits reduce cost of sales when eligible U.S.-made modules are sold. In Q1 2026, the company recognized $418.0 million of income-related government grants in cost of sales.

The model can break if policy changes faster than customers can plan, if tariffs raise costs on its own international footprint, if customers renegotiate contracts, or if raw materials like tellurium become scarce.

03 Product portfolio

Thin film now, perovskite later

Cash cow

CdTe utility-scale modules

This is the core product. CdTe means cadmium telluride, a thin-film semiconductor that uses much less semiconductor material than standard crystalline silicon modules.

Growth engine

U.S.-made Series 6 and Series 7 modules

Domestic production is the main earnings engine because eligible modules can qualify for Section 45X credits. The fifth U.S. facility has started operations, and the sixth U.S. facility is expected to start in the second half of 2026.

Growth engine

CuRe modules

CuRe is a module upgrade program meant to improve performance, temperature behavior, and degradation. Management said the CuRe launch is complete in Perrysburg and the first line is ramping.

Steady

India-made modules

India is a growing market and production base, but Q1 results showed that a higher India sales mix lowered average selling price per watt. India policy rules can help local sales, but they can also shift quickly.

Steady

Southeast Asia semi-finished production

Malaysia and Vietnam are being reworked rather than treated as full growth centers. Management said historical 7 GW capacity in Southeast Asia is being partly redirected to support U.S. finishing and perovskite work.

Option

Perovskite pilot line

First Solar plans a pilot line with up to 1 GW of capacity in 2027 using acquired Oxford IP. The upside is higher efficiency, but commercial scale and cost are still open questions.

04 Business segments

One real segment

CdTe solar modules100%modest

Other activities0%flat

The latest Q1 2026 filing says First Solar operates as a single operating segment: design, manufacture, and sale of CdTe solar modules. Sales are concentrated in the United States, with the remainder primarily in India.

05 Risk factors

What could go wrong

Backlog keeps shrinking

High impact · Medium odds

The backlog fell to $14.4 billion for 47.9 GW as of March 31, 2026. A large backlog still supports medium-term sales, but the direction is negative. If new long-term supply agreements do not replace shipped volume, future revenue growth can slow.

We watchQuarterly contracted backlog in dollars and GW, plus any large new supply agreements.

IRA credits get less valuable

High impact · Medium odds

Section 45X credits are a key reason U.S.-made modules are so profitable for First Solar. The OBBBA significantly curtails certain clean energy tax credits and adds limits tied to foreign entities of concern. If customers expect fewer project credits after 2026, demand for modules could weaken.

We watchCompany updates on OBBBA rules, Section 45X eligibility, and post-2026 customer demand.

Tellurium supply tightens

High impact · Medium odds

Tellurium is one of the main components of CdTe modules. China tightened export controls on tellurium-related products in 2025. First Solar says it is applying for export licenses and looking at other supply options, but the full plan is still an open question.

We watchLicense approvals, raw material cost comments, and any production delays tied to tellurium.

Tariffs hit both sides

Medium impact · High odds

Tariffs can help First Solar by making some imported competitors less attractive. They can also hurt First Solar when they apply to goods from its own international factories or to key inputs. Section 122 and Section 232 actions add uncertainty to costs and pricing.

We watchSection 122 tariff updates, Section 232 decisions, and tariff expense in cost of sales.

Product quality issues return

Medium impact · Medium odds

The company previously identified Series 7 manufacturing issues that may cause premature power loss. As of March 31, 2026, it recorded a $47 million specific warranty liability within an estimated future loss range of $35 million to $70 million. A wider issue would hurt margins and customer trust.

We watchWarranty liability changes, customer settlements, and any new module performance disclosures.

China-linked price pressure

Medium impact · High odds

First Solar competes against crystalline silicon module makers, including many Chinese companies. The company says some competitors may price very aggressively, helped by state support. U.S. policy protects part of First Solar's market, but global module prices can still pressure average selling price.

We watchAverage selling price per watt, India sales mix, and global module pricing commentary.

06 Quick answers

In one breath

What does First Solar actually sell?

First Solar sells solar modules, mainly for large utility-scale power projects. Its modules use CdTe thin-film technology rather than the more common crystalline silicon design.

Why do U.S. tax credits matter so much for First Solar?

Section 45X credits can reduce cost of sales when First Solar sells eligible U.S.-made modules. That is a major reason Q1 2026 gross margin reached 46.6%.

Why is the backlog decline important?

Backlog is future contracted module sales. First Solar still has $14.4 billion of backlog, but the decline signals that new bookings may not be keeping up with shipments.

What is the biggest supply chain risk?

Tellurium is the key watch item because it is used in CdTe modules. China has tightened export controls, and investors need to see how First Solar secures supply outside that risk.