Canadian Solar's Subsidiary CSI Solar Plans Capacity Additions Across Its Solar and Battery Storage Supply Chain

GUELPH,ON,Jan. 30,2023 --Jan 30,2022 -- Canadian Solar Inc. (the "Company" or "Canadian Solar") (NASDAQ: CSIQ) today announced that a wholly-owned subsidiary of its majority-owned subsidiary CSI Solar Co.,Ltd. ("CSI Solar") has entered into a multi-year investment agreement (the "Agreement") with the municipal government of Yangzhou City in Jiangsu Province,China. Under the Agreement,CSI Solar plans to add vertically integrated high efficiency wafer,cell,and module capacity,as well as battery system manufacturing capacity,in Yangzhou's clean energy manufacturing industrial park.

The project plan will be carried out in three phases,with phase I being 14 GW of wafer and cell capacity. Phase I is expected to commence production in the second half of 2023,while the implementation of phase II and III is subject to change,at the Company's discretion,based on market conditions and the Company's assessments. With this announcement and considering the solar supply chain's demand and supply backdrop,the Company updates its 2023 year-end capacities to 20 GW of ingot,35 GW of wafer,and 50 GW of cell and modules. The Company will provide further guidance on 2023 capital expenditures in the next earnings call.

Dr. Shawn Qu,Chairman and CEO of Canadian Solar,commented,"We are pleased to expand our manufacturing base in the latest high-efficiency solar and battery storage products to better support the strong demand needs of our customers. Our capacity additions will further enhance our profitability in an environment of rapidly declining upstream raw material costs,and we are dynamically adjusting our capacity plans to account for a market backdrop with pockets of large supply as well as pockets of tight supply relative to demand. Importantly,our business plans are designed to strengthen our long-term leadership position and we expect these additions to do just that."

About Canadian Solar Inc

Canadian Solar was founded in 2001 in Canada and is one of the world's largest solar technology and renewable energy companies. It is a leading manufacturer of solar photovoltaic modules,provider of solar energy and battery storage solutions,and developer of utility-scale solar power and battery storage projects with a geographically diversified pipeline in various stages of development. Over the past 21 years,Canadian Solar has successfully delivered around 82 GW of premium-quality,solar photovoltaic modules to customers across the world. Likewise,since entering the project development business in 2010,Canadian Solar has developed,built and connected over 7 GWp in over 20 countries across the world. Currently,the Company has approximately 500 MWp of projects in operation,6 GWp of projects under construction or in backlog (late-stage),and an additional 19 GWp of projects in advanced and early-stage pipeline. 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 onLinkedInor visitwww.canadiansolar.com.

Safe Harbor/Forward-Looking StatementsCertain statements in this press release 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 "Safe Harbor" provisions of theU.S.Private Securities Litigation Reform Act of 1995. In some cases,you can identify forward-looking statements by such terms as "believes," "expects," "anticipates," "intends," "estimates," the negative of these terms,or other comparable terminology. Factors that could cause actual results to differ include general business,regulatory and economic conditions and the state of the solar and battery storage market and industry; geopolitical tensions and conflicts,including impasses,sanctions and export controls; volatility,uncertainty,delays and disruptions related to the COVID-19 pandemic; supply chain disruptions; governmental support for the deployment of solar power; future available supplies of high-purity silicon; demand for end-use products by consumers and inventory levels of such products in the supply chain; changes in demand from significant customers; changes in demand from major markets,such asJapan,theU.S.,China,BrazilandEurope; changes in effective tax rates; changes in customer order patterns; changes in product mix; changes in corporate responsibility,especially environmental,social and governance ("ESG") requirements; capacity utilization; level of competition; pricing pressure and declines in or failure to timely adjust average selling prices; delays in new product introduction; delays in utility-scale project approval process; delays in utility-scale project construction; delays in the completion of project sales; continued success in technological innovations and delivery of products with the features that customers demand; shortage in supply of materials or capacity requirements; availability of financing; exchange and inflation rate fluctuations; uncertainties related to theCSI Solarcarve-out listing; litigation and other risks as described in the Company's filings with theSecurities and Exchange Commission,including its annual report on Form 20-F filed onApril 28,2022,as amended on October 18,2022. 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's date,unless otherwise stated,andCanadian Solarundertakes no duty to update such information,except as required under applicable law.

CANADIAN SOLAR INC.INVESTOR RELATIONS CONTACTS

Isabel Zhang

Investor Relations

Canadian Solar Inc.

investor@canadiansolar.com

David Pasquale

Global IR Partners

914-337-8801

csiq@globalirpartners.com

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