Improvements to both product and performance warranties have been made to Canadian Solar’s PV module series. Effective August 1, 2011, Canadian Solar's warranty now provides a linear performance guarantee for power output over a 25-year period as well as having a product warranty covering workmanship and material defects to 10 years.

Canadian Solar expects that the actual power output of its modules would be no less than 97% of the labelled power output during the first year of operation, but declining by no more than 0.7% annually. Over a 25-year period, actual power output is expected to be no less than 80% of the labelled power output.

The company also noted that the enhanced warranties were to remain backed by a 25-year, non-cancellable insurance policy issued by A.M. Best rated, investment grade insurance underwriters.