First Solar Launches Gaffney Phase One: Onshoring Milestone Met, But Margin Questions Persist

What happened

First Solar inaugurated the first phase of its Gaffney, South Carolina facility on schedule, onshoring final production for Series 6 Plus modules and marking a key step in its U.S. capacity expansion. The $330 million project is expected to double its annual nameplate capacity to 3.4 GW by mid-2027 when the second phase completes, consistent with management's earlier timeline. This removes a major thesis breaker identified in our prior report, which flagged a failure to start Gaffney in 2H 2026 as a condition that would undermine the domestic expansion pillar. However, the inauguration alone does not resolve the more critical earnings-quality concerns: Q2 gross margin included an $88.6M non-recurring tariff refund, and Section 301 tariffs still pressure international utilization and contract economics. The market's consensus narrative already prices in this domestic-content advantage, so the milestone likely reinforces rather than changes the valuation debate.

Implication

Investors should view this as a positive but expected milestone that validates the company's execution on its U.S. expansion. The thesis remains hinged on whether ex-refund gross margin holds above 45% in Q4 2026 and whether bookings convert at mid-30s c/W. Without confirmation on those fronts, the stock's current valuation at ~$216 (as of last close) already reflects a domestic-content premium. A more attractive entry remains near $190, while upside beyond $255 requires cleaner earnings without policy-accounting boosts.

Thesis delta

The Gaffney first-phase inauguration shifts the risk profile incrementally by removing the 'delay' scenario from our thesis breakers. However, the core WAIT thesis is unchanged: the stock still trades above our attractive entry of $190 and requires evidence of sustained ex-refund margins and policy-driven bookings to justify a higher rating. We maintain our base-case probability of 50% and do not alter the implied value of $225 at this time.