Canadian Solar provides a 10-year limited warranty on their photovoltaic module products against defects in materials and workmanship. They also provide a 25-year limited warranty guaranteeing certain levels of power output for 25 years. Several exclusions apply including damage from improper installation or use. The warranty claims process requires buyers to notify Canadian Solar in writing within the applicable warranty period and follow return procedures if issued a return authorization. If a module fails to conform to the warranties, Canadian Solar will repair, replace or compensate the buyer.