T1 Energy Shares Under Pressure Amid Regulatory Scrutiny

T1 Energy's stock fell sharply as debate over its eligibility for US manufacturing tax credits intensifies, despite ongoing factory expansion and financial strain.

The stock of solar manufacturer T1 Energy experienced a sharp sell-off on Friday, plunging over twelve percent. This decline significantly outpaced losses seen in comparable solar equities like EAF or FCEL, pointing to company-specific concerns. At the heart of the volatility is a persistent, months-long debate over the firm's eligibility for lucrative U.S. manufacturing tax credits under Section 45X.

Expansion Continues Despite Market Turmoil

Despite the stock's turbulence, T1 Energy is pushing forward with its capital investment plans. In Milam County, Texas, construction is underway on the G2_Austin solar cell factory. This project represents a planned investment of $400 to $425 million and is targeting an annual production capacity of 2.1 gigawatts, with output scheduled to commence in 2026. Meanwhile, the already operational G1_Dallas module plant is aiming for an annualized production rate of 4.5 gigawatts—more than double the average output from the first three quarters of 2025.

A key milestone is slated for July 1, 2026, when polysilicon supply from Hemlock Semiconductor is set to begin. This forms a crucial part of building a fully domestic supply chain that also includes wafers from Corning and steel frames from Nextpower. Successfully establishing this network could substantially bolster T1 Energy's position in ongoing regulatory discussions.

The Core Compliance Debate

The central uncertainty revolves around whether T1 Energy might be classified as a Foreign Entity of Concern (FEOC). Such a designation would jeopardize its access to manufacturing incentives under the One Big Beautiful Bill Act. Throughout late 2024 and early 2025, the company undertook extensive measures to avoid this classification, including capital raises, debt repayments, intellectual property restructuring, and new contractual agreements.

This strategy has drawn criticism from short-sellers. Research firm Culper has argued that T1 never established a clear path to FEOC compliance. It contends that announcements made in December 2025 were designed to simulate a separation from its Chinese parent company, Trina Solar, without enacting meaningful structural change. T1 Energy disputes this, stating that preliminary guidance from the U.S. Treasury Department regarding OBBBA implementation is consistent with its own assessment of 45X eligibility.

Financial Strain and Mounting Short Interest

The regulatory debate is impacting a company already facing financial headwinds. Over the last twelve-month period, T1 Energy reported revenue of just $2.9 million alongside a net loss of $450.6 million. Its operating cash flow was negative $102.8 million, and its total debt-to-equity ratio stood at 2.7.

Concurrently, short-selling pressure has increased substantially. Currently, 27.7 million shares are sold short, accounting for 13.8 percent of the public float. This figure is more than double the level seen twelve months ago, reflecting growing market skepticism.