KITCHENER, ON, April 17, 2026 /PRNewswire/ -- Canadian Solar Inc. (the &#34;Company&#34; or &#34;Canadian Solar&#34;) (NASDAQ:CSIQ) today announced that the Patent Trial and Appeal Board (&#34;PTAB&#34;) of the U.S.

<p xmlns="http://www.w3.org/1999/xhtml"><span xmlns="http://www.w3.org/1999/xhtml" class="legendSpanClass">KITCHENER, ON</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="legendSpanClass">April 17, 2026</span> /PRNewswire/ -- <a xmlns="http://www.w3.org/1999/xhtml" href="http://www.canadiansolar.com/" target="_blank" rel="nofollow">Canadian Solar Inc.</a> (the &#34;Company&#34; or &#34;Canadian Solar&#34;) (NASDAQ:<a class="ticker" href="https://www.benzinga.com/quote/CSIQ">CSIQ</a>) today announced that the Patent Trial and Appeal Board (&#34;PTAB&#34;) of the U.S. Patent and Trademark Office (&#34;USPTO&#34;) has issued Final Written Decisions invalidating all claims of two TOPCon (Tunnel Oxide Passivated Contact) solar cell patents. These patents were previously asserted by Trina Solar Co., Ltd. (&#34;Trina&#34;) against certain subsidiaries of Canadian Solar.</p>
<p xmlns="http://www.w3.org/1999/xhtml">This ruling reinforces Canadian Solar&#39;s long-standing, successful track record of managing international disputes. As a global leader in solar and energy storage technology innovation, the Company has always prioritized organic R&amp;D and has established a comprehensive and effective system to manage, commercialize, and defend its global IP rights which cover all key aspects of the industry value chain.</p><p xmlns="http://www.w3.org/1999/xhtml"><b xmlns="http://www.w3.org/1999/xhtml">Colin Parkin, President of Canadian Solar and President of e-STORAGE, </b>commented, &#34;Canadian Solar has always remained committed to organic and independent R&amp;D. We possess a deep and comprehensive understanding of our proprietary technologies. While we respect and value the intellectual property rights of all companies as we do our own, we firmly oppose the abusive use of IP to extort or hinder competition. We will continue to vigorously defend our legitimate business interests.&#34;</p><p xmlns="http://www.w3.org/1999/xhtml"><b xmlns="http://www.w3.org/1999/xhtml">About Canadian Solar Inc.<br xmlns="http://www.w3.org/1999/xhtml"></br></b>Canadian Solar is one of the world&#39;s largest solar technology and renewable energy companies. Founded in 2001 and headquartered in Kitchener, Ontario, the Company is a leading manufacturer of solar photovoltaic modules; provider of solar energy and battery energy storage solutions; and developer, owner, and operator of utility-scale solar power and battery energy storage projects. Over the past 25 years, Canadian Solar has successfully delivered over 174 GW of premium-quality, solar photovoltaic modules to customers across the world. Through its subsidiary e-STORAGE, Canadian Solar has shipped over 18 GWh of battery energy storage solutions to global markets as of December 31, 2025, boasting a $3.6 billion contracted backlog as of March 13, 2026. Since entering the project development business in 2010, Canadian Solar has developed, built, and connected approximately 12 GWp of solar power projects and 6.2 GWh of battery energy storage projects globally. Its geographically diversified project development pipeline includes 24 GWp of solar and 83 GWh of battery energy storage capacity in various stages of development. Canadian Solar is one of the most bankable companies in the solar and renewable energy industry, having been publicly listed on the NASDAQ since 2006. For additional information about the Company, follow Canadian Solar on <a xmlns="http://www.w3.org/1999/xhtml" href="https://www.linkedin.com/company/canadian-solar-inc-/" target="_blank" rel="nofollow">LinkedIn </a>or visit <a xmlns="http://www.w3.org/1999/xhtml" href="http://www.canadiansolar.com/" target="_blank" rel="nofollow">www.canadiansolar.com</a>.</p><p xmlns="http://www.w3.org/1999/xhtml"><b xmlns="http://www.w3.org/1999/xhtml">Safe Harbor/Forward-Looking Statements</b></p><p xmlns="http://www.w3.org/1999/xhtml">Certain statements in this press release, including those regarding the Company&#39;s expected future shipment volumes, revenues, gross margins, and project sales are forward-looking statements that involve a number of risks and uncertainties that could cause actual results to differ materially. These statements are made under the &#34;Safe Harbor&#34; provisions of the U.S. Private Securities Litigation Reform Act of 1995. In some cases, you can identify forward-looking statements by such terms as &#34;may&#34;, &#34;will&#34;, &#34;expect&#34;, &#34;anticipate&#34;, &#34;future&#34;, &#34;ongoing&#34;, &#34;continue&#34;, &#34;intend&#34;, &#34;plan&#34;, &#34;potential&#34;, &#34;prospect&#34;, &#34;guidance&#34;, &#34;believe&#34;, &#34;estimate&#34;, &#34;is/are likely to&#34; or similar expressions, the negative of these terms, or other comparable terminology. These forward-looking statements include, among other things, our expectations regarding global electricity demand and the adoption of solar and battery energy storage technologies; our growth strategies, future business performance, and financial condition; our transition to a long-term owner and operator of clean energy assets and expansion of project pipelines; our ability to monetize project portfolios, manage supply chain fluctuations, and respond to economic factors such as inflation and interest rates; our outlook on government incentives, trade measures, regulatory developments, and geopolitical risks; our expectations for project timelines, costs, and returns; competitive dynamics in solar and storage markets; our ability to execute supply chain, manufacturing, and operational initiatives; access to capital, debt obligations, and covenant compliance; relationships with key suppliers and customers; technological advancement and product quality; and risks related to intellectual property, litigation, and compliance with environmental and sustainability regulations. Other risks were described in the Company&#39;s filings with the Securities and Exchange Commission, including its annual report on Form 20-F filed on <span xmlns="http://www.w3.org/1999/xhtml" id="spanHghlt5f57">April 10, 2026</span>. Although the Company believes that the expectations reflected in the forward-looking statements are reasonable, it cannot guarantee future results, level of activity, performance, or achievements. Investors should not place undue reliance on these forward-looking statements. All information provided in this press release is as of today&#39;s date, unless otherwise stated, and Canadian Solar undertakes no duty to update such information, except as required under applicable law.</p><p xmlns="http://www.w3.org/1999/xhtml"><b xmlns="http://www.w3.org/1999/xhtml">Canadian Solar Inc.</b> <b xmlns="http://www.w3.org/1999/xhtml">Investor Relations Contact</b></p><p xmlns="http://www.w3.org/1999/xhtml">Wina Huang<br xmlns="http://www.w3.org/1999/xhtml"></br>Investor Relations<br xmlns="http://www.w3.org/1999/xhtml"></br>Canadian Solar Inc.<br xmlns="http://www.w3.org/1999/xhtml"></br><a xmlns="http://www.w3.org/1999/xhtml" href="mailto:investor@canadiansolar.com" target="_blank" rel="nofollow">investor@canadiansolar.com</a></p>



<p xmlns="http://www.w3.org/1999/xhtml" id="PURL"><img xmlns="http://www.w3.org/1999/xhtml" title="Cision" width="12" height="12" alt="Cision" src="https://edge.prnewswire.com/c/img/favicon.png?sn=CN37044&amp;sd=2026-04-17"></img> View original content:<a xmlns="http://www.w3.org/1999/xhtml" id="PRNURL" rel="nofollow" href="https://www.prnewswire.com/news-releases/us-patent-trial-and-appeal-board-invalidates-trinas-topcon-patents-302745689.html" target="_blank">https://www.prnewswire.com/news-releases/us-patent-trial-and-appeal-board-invalidates-trinas-topcon-patents-302745689.html</a></p><p xmlns="http://www.w3.org/1999/xhtml">SOURCE Canadian Solar Inc.</p>

CSIQ

U.S. Patent Trial and Appeal Board Invalidates Trina's TOPCon Patents

U.S. Ruling Invalidates Trina's Patents, Boosts Canadian Solar's Market Position

<section class="insight" data-version="1">
  <section data-block="information">
    <h3>Information</h3>
    <p>KITCHENER, ON, April 17, 2026 /PRNewswire/ -- Canadian Solar Inc. (the &amp;#34;Company&amp;#34; or &amp;#34;Canadian Solar&amp;#34;) (NASDAQ:CSIQ) today announced that the Patent Trial and Appeal Board (&amp;#34;PTAB&amp;#34;) of the U.S.</p>
  </section>

  <section data-block="ai-summary-paragraph">
    <h3>AI Summary</h3>
    <p>Canadian Solar Inc. recently achieved a significant legal victory as the U.S. Patent Trial and Appeal Board invalidated two of Trina Solar&#039;s key patents. This ruling strengthens Canadian Solar&#039;s IP rights and solidifies its competitive edge in the solar market, likely enhancing its long-term growth potential.</p>
  </section>

  <section data-block="ai-summary-bullets">
    <h3>Key Points</h3>
    <ul><li>U.S. PTAB invalidates Trina&#039;s TOPCon solar cell patents.</li><li>Strengthens Canadian Solar&#039;s position in international disputes.</li><li>Canadian Solar emphasizes commitment to R&amp;D and IP rights defense.</li><li>Company holds significant global project development backlog.</li><li>CSIQ consistently ranked as a market leader in solar energy.</li></ul>
  </section>

  <section data-block="companies-mentioned">
    <h3>Companies Mentioned</h3>
    <ul><li><strong>Trina Solar Co., Ltd. (TSL)</strong>: Negative impact expected due to patent invalidation by CSIQ.</li></ul>
  </section>

  <section data-block="category">
    <h3>Corporate Developments</h3>
    <p>The news falls under &#039;Corporate Developments&#039; as it involves legal outcomes affecting Canadian Solar&#039;s operational standing and competitive advantage in the marketplace. Such developments can significantly impact investor confidence and stock performance.</p>
  </section>

  <section data-block="market-moving">
    <h3>Market-Moving</h3>
    <ul><li>Invalidation of Trina&#039;s patents could lead to increased market share for CSIQ.</li><li>Improved investor sentiment following legal clarification may drive stock price higher.</li><li>Strengthened IP portfolio may result in better revenue forecasts and cash flows.</li><li>Enhanced ability to fend off competition could stimulate business development opportunities.</li></ul>
  </section>

  <section data-block="key-facts">
    <h3>Key Facts</h3>
    <ul><li>CSIQ invalidated two patents asserted by Trina Solar.</li><li>The ruling reinforces CSIQ&#039;s track record in international disputes.</li><li>Canadian Solar reported a $3.6 billion contracted backlog as of March 2026.</li><li>Company has developed approximately 12 GWp of solar projects since 2010.</li><li>CSIQ has shipped over 18 GWh of energy storage solutions as of 2025.</li></ul>
  </section>

  <section data-block="trading-thesis">
    <h3>Trading Thesis</h3>
    <p>Buy CSIQ; positive momentum from legal victories may boost stock in the next quarter.</p>
  </section>
</section>


<p xmlns="http://www.w3.org/1999/xhtml"><span xmlns="http://www.w3.org/1999/xhtml" class="legendSpanClass">KITCHENER, ON</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="legendSpanClass">April 17, 2026</span> /PRNewswire/ -- <a xmlns="http://www.w3.org/1999/xhtml" href="http://www.canadiansolar.com/" target="_blank" rel="nofollow">Canadian Solar Inc.</a> (the &#34;Company&#34; or &#34;Canadian Solar&#34;) (NASDAQ:<a class="ticker" href="https://www.benzinga.com/quote/CSIQ">CSIQ</a>) today announced that the Patent Trial and Appeal Board (&#34;PTAB&#34;) of the U.S. Patent and Trademark Office (&#34;USPTO&#34;) has issued Final Written Decisions invalidating all claims of two TOPCon (Tunnel Oxide Passivated Contact) solar cell patents. These patents were previously asserted by Trina Solar Co., Ltd. (&#34;Trina&#34;) against certain subsidiaries of Canadian Solar.</p>
<p xmlns="http://www.w3.org/1999/xhtml">This ruling reinforces Canadian Solar&#39;s long-standing, successful track record of managing international disputes. As a global leader in solar and energy storage technology innovation, the Company has always prioritized organic R&amp;D and has established a comprehensive and effective system to manage, commercialize, and defend its global IP rights which cover all key aspects of the industry value chain.</p><p xmlns="http://www.w3.org/1999/xhtml"><b xmlns="http://www.w3.org/1999/xhtml">Colin Parkin, President of Canadian Solar and President of e-STORAGE, </b>commented, &#34;Canadian Solar has always remained committed to organic and independent R&amp;D. We possess a deep and comprehensive understanding of our proprietary technologies. While we respect and value the intellectual property rights of all companies as we do our own, we firmly oppose the abusive use of IP to extort or hinder competition. We will continue to vigorously defend our legitimate business interests.&#34;</p><p xmlns="http://www.w3.org/1999/xhtml"><b xmlns="http://www.w3.org/1999/xhtml">About Canadian Solar Inc.<br xmlns="http://www.w3.org/1999/xhtml"></br></b>Canadian Solar is one of the world&#39;s largest solar technology and renewable energy companies. Founded in 2001 and headquartered in Kitchener, Ontario, the Company is a leading manufacturer of solar photovoltaic modules; provider of solar energy and battery energy storage solutions; and developer, owner, and operator of utility-scale solar power and battery energy storage projects. Over the past 25 years, Canadian Solar has successfully delivered over 174 GW of premium-quality, solar photovoltaic modules to customers across the world. Through its subsidiary e-STORAGE, Canadian Solar has shipped over 18 GWh of battery energy storage solutions to global markets as of December 31, 2025, boasting a $3.6 billion contracted backlog as of March 13, 2026. Since entering the project development business in 2010, Canadian Solar has developed, built, and connected approximately 12 GWp of solar power projects and 6.2 GWh of battery energy storage projects globally. Its geographically diversified project development pipeline includes 24 GWp of solar and 83 GWh of battery energy storage capacity in various stages of development. Canadian Solar is one of the most bankable companies in the solar and renewable energy industry, having been publicly listed on the NASDAQ since 2006. For additional information about the Company, follow Canadian Solar on <a xmlns="http://www.w3.org/1999/xhtml" href="https://www.linkedin.com/company/canadian-solar-inc-/" target="_blank" rel="nofollow">LinkedIn </a>or visit <a xmlns="http://www.w3.org/1999/xhtml" href="http://www.canadiansolar.com/" target="_blank" rel="nofollow">www.canadiansolar.com</a>.</p><p xmlns="http://www.w3.org/1999/xhtml"><b xmlns="http://www.w3.org/1999/xhtml">Safe Harbor/Forward-Looking Statements</b></p><p xmlns="http://www.w3.org/1999/xhtml">Certain statements in this press release, including those regarding the Company&#39;s expected future shipment volumes, revenues, gross margins, and project sales are forward-looking statements that involve a number of risks and uncertainties that could cause actual results to differ materially. These statements are made under the &#34;Safe Harbor&#34; provisions of the U.S. Private Securities Litigation Reform Act of 1995. In some cases, you can identify forward-looking statements by such terms as &#34;may&#34;, &#34;will&#34;, &#34;expect&#34;, &#34;anticipate&#34;, &#34;future&#34;, &#34;ongoing&#34;, &#34;continue&#34;, &#34;intend&#34;, &#34;plan&#34;, &#34;potential&#34;, &#34;prospect&#34;, &#34;guidance&#34;, &#34;believe&#34;, &#34;estimate&#34;, &#34;is/are likely to&#34; or similar expressions, the negative of these terms, or other comparable terminology. These forward-looking statements include, among other things, our expectations regarding global electricity demand and the adoption of solar and battery energy storage technologies; our growth strategies, future business performance, and financial condition; our transition to a long-term owner and operator of clean energy assets and expansion of project pipelines; our ability to monetize project portfolios, manage supply chain fluctuations, and respond to economic factors such as inflation and interest rates; our outlook on government incentives, trade measures, regulatory developments, and geopolitical risks; our expectations for project timelines, costs, and returns; competitive dynamics in solar and storage markets; our ability to execute supply chain, manufacturing, and operational initiatives; access to capital, debt obligations, and covenant compliance; relationships with key suppliers and customers; technological advancement and product quality; and risks related to intellectual property, litigation, and compliance with environmental and sustainability regulations. Other risks were described in the Company&#39;s filings with the Securities and Exchange Commission, including its annual report on Form 20-F filed on <span xmlns="http://www.w3.org/1999/xhtml" id="spanHghlt5f57">April 10, 2026</span>. Although the Company believes that the expectations reflected in the forward-looking statements are reasonable, it cannot guarantee future results, level of activity, performance, or achievements. Investors should not place undue reliance on these forward-looking statements. All information provided in this press release is as of today&#39;s date, unless otherwise stated, and Canadian Solar undertakes no duty to update such information, except as required under applicable law.</p><p xmlns="http://www.w3.org/1999/xhtml"><b xmlns="http://www.w3.org/1999/xhtml">Canadian Solar Inc.</b> <b xmlns="http://www.w3.org/1999/xhtml">Investor Relations Contact</b></p><p xmlns="http://www.w3.org/1999/xhtml">Wina Huang<br xmlns="http://www.w3.org/1999/xhtml"></br>Investor Relations<br xmlns="http://www.w3.org/1999/xhtml"></br>Canadian Solar Inc.<br xmlns="http://www.w3.org/1999/xhtml"></br><a xmlns="http://www.w3.org/1999/xhtml" href="mailto:investor@canadiansolar.com" target="_blank" rel="nofollow">investor@canadiansolar.com</a></p>



<p xmlns="http://www.w3.org/1999/xhtml" id="PURL"><img xmlns="http://www.w3.org/1999/xhtml" title="Cision" width="12" height="12" alt="Cision" src="https://edge.prnewswire.com/c/img/favicon.png?sn=CN37044&amp;sd=2026-04-17"></img> View original content:<a xmlns="http://www.w3.org/1999/xhtml" id="PRNURL" rel="nofollow" href="https://www.prnewswire.com/news-releases/us-patent-trial-and-appeal-board-invalidates-trinas-topcon-patents-302745689.html" target="_blank">https://www.prnewswire.com/news-releases/us-patent-trial-and-appeal-board-invalidates-trinas-topcon-patents-302745689.html</a></p><p xmlns="http://www.w3.org/1999/xhtml">SOURCE Canadian Solar Inc.</p>

Canadian Solar Inc. recently achieved a significant legal victory as the U.S. Patent Trial and Appeal Board invalidated two of Trina Solar's key patents. This ruling strengthens Canadian Solar's IP rights and solidifies its competitive edge in the solar market, likely enhancing its long-term growth potential.

U.S. Patent Trial and Appeal Board Invalidates Trina's TOPCon Patents

AI Summary

Sentiment Rationale

Trading Thesis

Market-Moving

Key Facts

Companies Mentioned

Corporate Developments

Related News