Swift Current sues First Solar over alleged defective thin-film modules

Swift Current Energy has initiated legal action against First Solar, filing a complaint in New York state court in September 2026. The lawsuit centers on the allegation that First Solar knowingly supplied 2.4 million defective solar modules to the developer.

According to the complaint, the equipment in question included Series 6 Plus and Series 7 thin-film cadmium telluride models, with total costs exceeding $360 million. The affected infrastructure includes the 800 MWdc Double Black Diamond project in Illinois.

Swift Current asserts that performance issues were observed immediately upon installation during 2023 and 2024. The developer claims these defects were known to the manufacturer at the time of supply, forming the basis of the current litigation.

The Core Allegations

Swift Current’s complaint centers on the specific technical specifications of the hardware involved in the dispute. The modules at issue are identified as Series 6 Plus and Series 7 thin-film cadmium telluride models. Unlike crystalline silicon panels that dominate much of the utility-scale market, cadmium telluride technology utilizes a different manufacturing process and material structure. Understanding these distinct technical profiles is essential for evaluating the nature of the alleged failures, as performance degradation in thin-film cells can manifest differently than in silicon-based systems. The complaint points to these specific model generations as the source of the alleged defects.

The scale of the procurement is substantial, with the total equipment cost exceeding $360 million. This financial magnitude underscores the stakes for both parties involved in the litigation. For developers, such large capital expenditures represent significant upfront investments that must be recouped over the decades-long lifespan of the facility. The affected infrastructure includes the 800 MWdc Double Black Diamond project in Illinois. This specific site serves as a primary example of the alleged supply issues within the broader legal claim.

The timeline of the alleged problems is a critical element of the lawsuit. Swift Current asserts that performance issues were observed immediately upon installation during 2023 and 2024. In the solar industry, early-stage performance monitoring is standard practice to verify that modules meet their rated output levels. When discrepancies appear right after commissioning, it often prompts immediate investigation into potential manufacturing or supply chain errors. The developer maintains that these initial observations formed the basis for the current legal action, highlighting the promptness of the reported issues relative to the installation dates.

Technical Disputes and Testing

• Swift Current filed formal warranty claims on December 23, 2024, citing "Edge Grind Defects" and "Substrate Defects."
• First Solar rejected the claims on May 2, 2025, deeming them inadequately evidenced.
• The manufacturer proposed individual laboratory testing for over 1.5 million modules.
• Swift Current argues this testing is commercially impossible due to shipping costs.
• A Leidos Engineering report identified an average 8 percent power loss in tested modules.
• The developer alleges First Solar uses secret "preconditioning" to inflate power ratings.

The dispute over verification methods highlights a common friction point in large-scale solar procurement. While manufacturers often rely on controlled laboratory environments to isolate specific manufacturing faults, developers frequently face prohibitive logistical barriers when transporting vast quantities of heavy glass modules for independent analysis. Swift Current’s position that such testing is commercially impossible reflects the practical constraints developers encounter when attempting to validate field performance against contractual specifications.

The technical nature of the alleged flaws adds complexity to the legal arguments. "Edge Grind Defects" and "Substrate Defects" refer to specific imperfections in the module’s physical structure that can compromise long-term durability and energy output. The Leidos Engineering report, which documented an average 8 percent power loss in tested units, provides a quantitative baseline for assessing the severity of these issues. The allegation regarding secret "preconditioning" touches on industry practices where modules are subjected to specific environmental stress tests before certification. If such procedures artificially elevate initial power ratings without reflecting real-world performance, it could distort the expected energy yield for investors and operators relying on those figures for financial modeling.

Financial Impact and Response

First Solar has already recorded a $50 million warranty charge related to edge grind issues, a financial acknowledgment that underscores the tangible cost of manufacturing imperfections in utility-scale deployments. Such accruals reflect the manufacturer’s assessment of potential liabilities under standard industry warranty frameworks, where specific defect categories trigger predetermined financial reserves. While this charge addresses a particular technical fault, it does not resolve the broader dispute over the scale of affected equipment or the duration of performance degradation. The existence of this reserve suggests that internal reviews identified material issues warranting financial provisioning, even as the two parties continue to litigate the extent of the damage and the appropriate remediation path.

Swift Current is pursuing damages and restitution specifically for lost revenue and commitments under power purchase agreements. For developers, these contractual obligations represent fixed financial deliverables that must be met regardless of equipment performance. When modules underperform, the resulting shortfall in energy generation directly impacts cash flow, potentially triggering penalties or forcing the developer to purchase replacement power at market rates to fulfill contract terms. This dynamic transforms a technical hardware issue into a significant financial exposure, as the developer must cover both the replacement costs and the opportunity costs associated with missed energy sales. The lawsuit thus targets not just the physical modules, but the economic consequences of their alleged failure, seeking to restore the financial position the developer would have held had the equipment performed as specified.

What to watch

The immediate focal point for this dispute is the hearing scheduled before Justice Andrew Borrok on November 16, 2026. This court date serves as the next concrete milestone in a litigation process that has already unfolded over several years. Until that session occurs, the legal arguments regarding the extent of the defects and the validity of the warranty claims remain unresolved. Readers should monitor the proceedings for any preliminary rulings or evidentiary decisions that might shape the trajectory of the case.

Beyond the specific courtroom schedule, the broader implications of the outcome will depend on how the court interprets the technical evidence presented by both parties. The resolution could influence how similar large-scale procurement disputes are handled in the future, particularly regarding the allocation of risk for performance shortfalls. Stakeholders in the sector will likely observe whether the judgment addresses the specific allegations about manufacturing processes or focuses primarily on the financial damages sought. The final decision will determine the immediate financial position of the developer and the manufacturer, but its precedential value may extend to other utility-scale projects relying on similar contractual frameworks.