EXHIBIT 23.3 [LATHAM & WATKINS LLP LETTERHEAD] October 23, 2006 Canadian Solar Inc. Xin Zhuang Industry Park, Changshu, Suzhou Jiangsu 215562 People's Republic of China Ladies and Gentlemen: We hereby consent to the use of our name under the caption "Legal Matters" in the prospectus included in the registration statement on Form F-1, originally filed by Canadian Solar Inc. on October 23, 2006, with the Securities and Exchange Commission under the Securities Act of 1933, as amended. In giving such consent, we do not thereby admit that we come within the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended, or the regulations promulgated thereunder. Sincerely yours, /s/ Latham & Watkins LLP