[Canadian Solar Completes Sale of Solar Power Plant to Stonepeak Infrastructure Partners ONTARIO, Canada, August 27, 2012 — ( Canadian Solar Inc. Named “Canadian Solar 1” (or “CS1”), the solar installation is now connected to the grid and includes approximately 50,000 Canadian Solar CS6M modules. Canadian Solar also won a 20-year contract to provide operations and maintenance services to Stonepeak] [FORM 6-K CANADIAN SOLAR INC. No. 199 Lushan Road Suzhou New District Suzhou, Jiangsu 215129 People’s Republic of China Form 20-F x Form 40-F o o o CANADIAN SOLAR INC. Form 6-K TABLE OF CONTENTS]