================================================================================ FORM 6-K ----------- SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 REPORT OF FOREIGN ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE MONTH OF DECEMBER 2006 COMMISSION FILE NUMBER: 001-33107 ----------- CANADIAN SOLAR INC. ----------- XIN ZHUANG INDUSTRY PARK, CHANGSHU, SUZHOU JIANGSU 215562 PEOPLE'S REPUBLIC OF CHINA (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) ----------- Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. Form 20-F X Form 40-F --- --- Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ----- Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ----- Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. Yes No X --- --- If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- N/A ----- ================================================================================

CANADIAN SOLAR INC. Form 6-K TABLE OF CONTENTS

PAGE ---- Signature 3 Exhibit 99.1 -- Press Release 4

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. CANADIAN SOLAR INC. By: /s/ Xiaohua Qu ------------------------------ Name: Xiaohua Qu Title: Chairman and Chief Executive Officer Date: December 11, 2006

EXHIBIT 99.1 CANADIAN SOLAR REPORTS THIRD QUARTER 2006 RESULTS COMPANY TO HOLD CONFERENCE CALL TODAY AT 9 A.M. NEW YORK TIME o Third quarter 2006 net revenues increased to $17.8 million, compared to $4.5 million for the third quarter of 2005 o Third quarter 2006 non-GAAP diluted earnings per share of $0.15, compared to $0.08 for the third quarter of 2005 o CSI expects fourth quarter 2006 net revenues to be in the range of $24.5 million to $26 million, including approximately $8.1 million of silicon materials sales, compared to net revenues of $6.81 million for the fourth quarter 2005 JIANGSU, CHINA, DECEMBER 11, 2006 -- Canadian Solar Inc. ("the Company", or "CSI") (Nasdaq: CSIQ) today reported unaudited financial results for the three and nine months ended September 30, 2006. Net revenues for the third quarter of 2006 was $17.8 million, compared to $4.5 million for the third quarter of 2005. Net income was $0.2 million, or $0.01 per diluted share, compared to a net income of $1.2 million, or $0.08 per diluted share for the third quarter of 2005. Excluding share-based compensation of $2.9 million or $0.14 per diluted share, net income for the third quarter of 2006 was $0.15 per diluted share. Shawn Qu, Chairman and CEO of CSI, commented: "We had another good quarter, led by the continued growth in sales to our existing customers, particularly in Germany and Spain. Our diversified supply chain approach, long-term supply agreements and silicon reclamation program helped us to offset relatively high material costs. Separately, we raised approximately $83.2 million from our initial public offering, providing us with capital to continue implementing our growth strategy, which includes bringing four solar cell production lines online in 2007." Bing Zhu, Chief Financial Officer of CSI, said: "On a non-GAAP basis (excluding non-cash charges relating to share-based compensation and the convertible note), we achieved year-over-year net revenues and net income growth in the third quarter." As of September 30, 2006, the Company had cash and cash equivalents of $12.2 million. This amount does not include the approximately $83 million net proceeds from the Company's initial public offering that will be recorded in the fourth quarter of 2006. OUTLOOK Based on current market conditions and customer forecasts, the Company expects its net revenues for the fourth quarter of 2006 to be approximately $24.5 million to $26 million, including approximately $8.1 million of silicon materials sales, compared to net revenues of $6.81 million for the fourth quarter of 2005 and $17.8 million for the third quarter of 2006. The fourth quarter will include charges of approximately $2.69 million or $0.11 per diluted share relating to share-based compensation.

With respect to the fourth quarter of 2006, Mr. Qu commented: "I just returned this past Saturday from another visit to our key German market. Unlike earlier visits, I observed some weakness in this important market, which I believe is attributable, in part, to inventory clearance efforts by smaller solar module makers, many of whom are, I believe leaving the market. Although industry consolidation will benefit the overall market and CSI in the mid- to long-term, in the short term, the current inventory clearance efforts by these smaller solar module makers have caused some of CSI's German distributors to delay or reduce their end-of-year product stocking plans, thereby impacting CSI's near-term operating results. We believe, following our IPO, CSI is well-capitalized and our financial strength will allow us to weather near-term market volatility." Looking forward, Mr. Qu stated: "CSI is addressing the situation by taking the following measures: o we are working closely with our long-term distributors in their business planning, and increasing our support for their marketing and branding programs; o we are accelerating our marketing efforts outside of Germany, particularly in Spain, the U.S. and Korea; and o we are renegotiating our existing feedstock supply agreements and entering into new, more favorable, long-term supply agreements by leveraging our purchase volumes and financial strength with our loyal suppliers. The new supply contracts have allowed us to sell a limited amount of our existing solar silicon materials and will permit us to further reduce costs." INVESTOR CONFERENCE CALL / WEBCAST DETAILS A conference call has been scheduled for 10:00 p.m. on Monday, December 11, 2006 (in Jiangsu). This will be 9:00 a.m. on Monday, December 11, in New York. During the call, time will be set-aside for analysts and interested investors to ask questions of executive officers. The call may be accessed by dialing +1-201-689-8471. A replay of the call will be available starting two hours after the live call through to 1:00 p.m. on Thursday, December 21, 2006 (in Jiangsu) or midnight on Wednesday, December 20, 2006 (in New York) at www.csisolar.com and by telephone at +1-201-612-7415. The account number to access the replay is 3055 and the conference ID number is 223686. ABOUT CANADIAN SOLAR INC. Founded in 2001, Canadian Solar Inc. (CSI) is a standard solar module and specialty solar module and product company, serving customers located in various markets worldwide. CSI is incorporated in Canada and conducts all of its manufacturing operations in China. Backed by years of experience and knowledge in the solar power market and the silicon industry, CSI has become a major global provider of solar power products for a wide range of applications. For more information visit www.csisolar.com. CONTACTS: In Calgary, Alberta In the U.S. Bob Patterson David Pasquale VP, Corporate Development The Ruth Group Canadian Solar Inc. 646-536-7006 ir@csisolar.com dpasquale@theruthgroup.com

SAFE HARBOR / FORWARD-LOOKING STATEMENTS: Certain statements in this press release including statements regarding expected future financial and industry growth 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 the U.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 and economic conditions and the state of the solar industry; governmental support for the deployment of solar power; future shortage or availability of the supply 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, including customers of our silicon materials sales; changes in demand from major markets such as Germany; changes in customer order patterns; changes in product mix; capacity utilization; level of competition; pricing pressure and declines in average selling price; delays in new product introduction; continued success in technological innovations and delivery of products with the features customers demand; shortage in supply of materials or capacity requirements; availability of financing; exchange rate fluctuations; litigation and other risks as described in the Company's SEC filings, including its registration statement on Form F-1 originally filed on October 23, 2006, as amended. 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. You should not place undue reliance on these forward-looking statements. All information provided in this press release and in the attachments is as of December 11, 2006, and CSI undertakes no duty to update such information, except as required under applicable law. -- TABLES ATTACHED --

CANADIAN SOLAR INC. UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (IN THOUSANDS OF U.S. DOLLARS, EXCEPT SHARE AND PER SHARE DATA AND UNLESS OTHERWISE STATED)

THREE MONTHS NINE MONTHS ENDED SEPTEMBER 30 ENDED SEPTEMBER 30, 2006 2005 2006 2005 Products $ 17,799 $ 4,530 $ 43,773 $ 11,084 Others - - 68 428 ------------ ------------ ------------ ------------ TOTAL NET REVENUES $ 17,799 $ 4,530 $ 43,841 $ 11,512 TOTAL COST OF REVENUES 12,977 2,784 31,601 6,704 ------------ ------------ ------------ ------------ GROSS PROFIT 4,822 1,746 12,240 4,808 OPERATING EXPENSES: Selling expenses 1,147 33 1,676 100 General and administrative expenses 2,733 465 4,483 1,226 Research and development expenses 70 2 115 10 ------------ ------------ ------------ ------------ TOTAL OPERATING EXPENSES 3,950 500 6,274 1,336 ------------ ------------ ------------ ------------ OPERATING INCOME (LOSS) 872 1,246 5,966 3,472 Interest Expenses (346) - (1,980) - Interest income 38 4 91 8 Loss on change in fair value of derivatives - - (6,997) - Loss on financial instruments related to convertible notes - - (1,190) - Other income (expenses), net (12) (7) (13) (21) ------------ ------------ ------------ ------------ Income (loss) before income taxes 552 1,243 (4,123) 3,459 Income tax expense (313) (6) (202) (343) ------------ ------------ ------------ ------------ NET INCOME (LOSS) $ 239 $ 1,237 $ (4,325) $ 3,116 ============ ============ ============ ============ BASIC EARNINGS PER SHARE $ 0.01 $ 0.08 ($ 0.25) $ 0.20 DILUTED EARNINGS PER SHARE $ 0.01 $ 0.08 ($ 0.25) $ 0.20 BASIC WEIGHTED AVERAGE OUTSTANDING SHARES 20,970,000 15,427,995 17,275,330 15,427,995 DILUTED WEIGHTED AVERAGE OUTSTANDING SHARES 20,998,344 15,427,995 17,275,330 15,427,995

CANADIAN SOLAR INC. RECONCILIATION OF US GAAP GROSS PROFIT, OPERATING INCOME (LOSS) AND NET INCOME (LOSS) TO NON-US GAAP GROSS PROFIT, OPERATING INCOME (LOSS) AND NET INCOME (LOSS) (IN THOUSANDS OF US DOLLARS) (UNAUDITED) USE OF NON-US GAAP FINANCIAL INFORMATION To supplement its condensed consolidated financial statements presented on a US GAAP basis, Canadian Solar uses non-US GAAP measures of gross profit, operating income (loss) and net income (loss), that are US GAAP gross profit, operating income (loss) and net income (loss) adjusted to exclude certain costs, expenses or gains, referred to as special items. Non-US GAAP adjusted gross profit, operating income (loss) and net income (loss) measure give an indication of the company's baseline performance before other charges that are considered by management to be outside of its core operating results. In addition, the company's non-US GAAP adjusted measure of gross profit, operating income (loss) and net income (loss) are among the primary indicators management uses as a basis for its planning and forecasting of future periods. The presentation of this additional information should not be considered in isolation or as a substitute for gross profit, operating income (loss) and net income (loss) prepared in accordance with generally accepted accounting principles in the United States of America.

THREE MONTHS ENDED THREE MONTHS ENDED SEPTEMBER 30, 2006 SEPTEMBER 30, 2005 GROSS OPERATING NET GROSS OPERATING NET PROFIT INCOME INCOME PROFIT INCOME INCOME (LOSS) (LOSS) (LOSS) (LOSS) --------------------------------------- ------------------------------------ US GAAP Amounts $4,822 $872 $239 $1,746 $1,246 $1,237 Special items Share based compensation charges 73 2,904 2,904 - - - Total special items 73 2,904 2,904 - - - Non-US GAAP Profit $4,895 $3,776 $3,143 $1,746 $1,246 $1,237 Adjusted Gross Margin 27.5% 38.5% Adjusted Operating Expense - % of Revenue 6.3% 11.0% Adjusted Operating Margin 21.2% 27.5% NINE MONTHS ENDED NINE MONTHS ENDED SEPTEMBER 30, 2006 SEPTEMBER 30, 2005 GROSS OPERATING NET GROSS OPERATING NET PROFIT INCOME INCOME PROFIT INCOME INCOME (LOSS) (LOSS) (LOSS) (LOSS) US GAAP Amounts $12,240 $5,966 ($4,325) $4,808 $3,472 $3,116 Special items Share based compensation charges 97 3,494 3,494 - - - Non-cash charges relating to convertible notes - - 8,893 - - - Total special items 97 3,494 12,387 - - - Non-US GAAP Profit $12,337 $9,460 $8,062 $4,808 $3,472 $3,116 Adjusted Gross Margin 28.1% 41.8% Adjusted Operating Expense - % of Revenue 6.5% 11.6% Adjusted Operating Margin 21.6% 30.2%
Non-US GAAP adjusted condensed consolidated statements of operations are intended to present the Company's operating results, excluding special items.

CANADIAN SOLAR INC. UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (IN THOUSANDS OF U.S. DOLLARS)

SEPTEMBER 30, DECEMBER 31, 2006 2005 ASSETS Current assets: Cash and cash equivalents 12,239 6,280 Restricted cash 771 112 Accounts receivable 8,440 2,067 Inventories 30,005 12,163 Advances to suppliers 4,212 4,739 Other current assets 2,553 1,072 Total current assets 58,220 26,433 Property, plant and equipment, net 3,486 932 Intangible assets, net 526 - Deferred offering cost 3,780 - Deferred tax assets (non-current) 256 65 TOTAL ASSETS 66,268 27,430 LIABILITIES AND STOCKHOLDER'S EQUITY Current liabilities: Short-term borrowing 23,190 1,300 Accounts payable 2,445 4,306 Advances from suppliers and customers 6,414 2,823 Income tax payable 575 914 Amounts due to related parties 103 431 Embedded derivatives related to convertible notes - 3,679 Other current liabilities 4,687 1,914 Total current liabilities 37,414 15,367 Accrued warranty costs 769 341 Convertible notes - 3,387 Financial instruments related to convertible notes - 1,107 Other non-current liabilities 982 261 TOTAL LIABILITIES 39,165 20,463 Paid-in capital 10,373 211 Additional paid-in capital 13,910 - Retained earnings 2,322 6,647 Foreign currency translation reserve 498 109 Total stockholder's equity 27,103 6,967 TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY 66,268 27,430