Scope and object This International Standard specifies the minimum requirements for the design qualification and type approval of concentrator photovoltaic (CPV) modules and assemblies suitable for long-term operation in general open-air climates as defined in IEC 60721-2-1. The test sequence is partially based on that specified in IEC 61215-1 for the design qualification and type approval of flat-plate terrestrial crystalline silicon PV modules. However@ some changes have been made to account for the special features of CPV receivers and modules@ particularly with regard to the separation of on-site and in-lab tests@ effects of tracking alignment@ high current density@ and rapid temperature changes@ which have resulted in the formulation of some new test procedures or new requirements. The object of this test standard is to determine the electrical@ mechanical@ and thermal characteristics of the CPV modules and assemblies and to show@ as far as possible within reasonable constraints of cost and time@ that the CPV modules and assemblies are capable of withstanding prolonged exposure in climates described in the scope. The actual life of CPV modules and assemblies so qualified will depend on their design@ production@ environment@ and the conditions under which they are operated. This standard shall be used in conjunction with the retest guidelines described in Annex B.