**First Solar Accuses Adani Group of Patent Infringement in Solar Technology**
In a legal battle unfolding in a Delaware court, First Solar has accused the Adani Group’s Indian subsidiary, MSPVL, of infringing on two patented technologies related to solar panel manufacturing. The U.S.-based solar company is seeking unspecified damages, while MSPVL has firmly denied the allegations. This case comes on the heels of First Solar’s previous lawsuit against a Chinese solar manufacturer for similar patent violations and its issuance of warning letters to other companies regarding potential infringements.
The dispute arises at a time when Indian solar firms have benefited from a 50% tariff imposed by the U.S. on Chinese solar cells and polysilicon, while solar cells from India have been exempt from these tariffs. Queries sent to both the Adani Group and First Solar on Monday went unanswered.
The legal proceedings began when First Solar sent a letter to the Adani Group on April 1, accusing it of copying two patented technologies. In response, MSPVL filed a motion in Delaware court on April 15, seeking a declaration that it does not infringe on First Solar’s patents. MSPVL argues that its manufacturing process differs significantly from First Solar’s patented technology, particularly in the heat treatment phase. Following this, First Solar filed a counterclaim on August 1, alleging patent infringement and seeking damages, the amount of which has yet to be determined. Both companies have requested a jury trial.
Under U.S. patent law, a company can avoid literal infringement if it does not replicate every step of a patented process exactly. However, infringement may still be established under the doctrine of equivalents if the modified process achieves the same function and result. Experts suggest that the Adani Group may have a strong technical defense, as its manufacturing process omits the heat treatment step, potentially resulting in a fundamentally different product. Nevertheless, First Solar may argue that the differences are not substantial enough to avoid infringement claims.
At the core of this dispute is the TOPCon technology, which enhances the efficiency of solar cells. The U.S. patent office granted two patents for TOPCon manufacturing to Tetrasun, Inc., a company acquired by First Solar in 2013, between 2015 and 2017. First Solar, which utilizes a different thin-film technology for its panels, began investigating potential patent infringements by competitors using TOPCon in June 2024, subsequently sending warning letters to several rivals, including JinkoSolar.
As this legal battle unfolds, the implications for both companies and the broader solar industry remain significant, particularly in the context of ongoing trade tensions and evolving patent laws.
**FAQ**
**What is the main issue in the First Solar vs. Adani Group case?**
The main issue is First Solar’s allegation that the Adani Group’s subsidiary, MSPVL, has infringed on its patented solar panel manufacturing technologies, leading to a legal dispute over potential damages and patent rights.
