IEC 62108 Concentrator Photovoltaic (CPV) Module and Assembly Compliance Testing
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Summary of IEC 62108 Concentrator Photovoltaic Modules and Assemblies
IEC 62108 and EN 62108 evaluate 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.
Additionally, IEC 62108 testing determines the electrical, mechanical, and thermal characteristics of the CPV modules and assemblies. IEC also shows, within reasonable constraints of cost and time, if the CPV modules and assemblies are capable of withstanding prolonged exposure in climates.
The actual life of qualified CPV modules and assemblies will depend on their design, production, environment, and the conditions under which they are operated.
IEC 62108 Concentrator Photovoltaic Module and Assemblies Test Procedures
Pre-Test
Representative samples must generally include all components. Also, test samples are taken at random from a production batch(es). Before testing, it is recommended that all testing samples are exposed to the direct normal irradiation of sunlight. This may be either natural or simulated. This is designed to reduce the initial photon degradation effects.
The test sequence is partially based on that specified in IEC 61215 for the design qualification and type approval of flat-plate terrestrial crystalline silicon PV modules.
Some changes have been made to account for the special features of CPV receivers and modules. These changes are particularly with regard to the separation of on-site and in-lab tests, effects of tracking alignment, high current density, and rapid temperature changes. These changes have also resulted in the formulation of some new test procedures or new requirements.
Test Procedures
Thermal Shock: Thermal cycling testing determines the ability of the receivers to withstand thermal mismatch, fatigue, and other stresses caused by rapid changes in temperatures.
Two samples are required for thermal cycling testing. One of three options can be carried out depending on the different materials used within the sample. A total of 500, 1000, or 2000 total cycles are executed. The target heat sink temperature is either 110 C, 85 C, or 65 C for the respective cycles.
Humidity: Damp heat testing evaluates the ability of CPV modules or assemblies to withstand the effects of long-term penetration of humidity.
Similar to thermal shock testing, a total of two modules are required for humidity testing. The test samples are subjected to temperatures controlled to 85 C and relative humidity of 85%. The unit is exposed to these conditions for 1000 hours.
Water/Rain: The purpose of water spray testing is to determine whether rainwater can enter the concentrator photovoltaic module or assembly. If this occurs, it may cause a ground fault or safety hazard.
First, the unit is placed on a text fixture to specified requirements. Next, the rain-test fixture is placed above the module’s most vulnerable location. The module or assembly is exposed to water spray for 1 hour in each orientation. After each hour, the module is examined for evidence of water penetration.
Immersion: IEC 62108 immersion testing evaluates the insulation of the concentrator system under wet operating conditions.
The samples are immersed in a solution or sprayed with the solution for at least 5 minutes.
Dust Ingress Protection: The degree of protection defines the extent to which an enclosure can protect against the entry of dust.
This testing only applies to modules that have a package design that is deemed an enclosure. The module is subjected to IP 6X test. This is conducted in conformance with IEC 60529.
Solar Radiation: Solar radiation testing determines the long-term heating effects of outdoor conditions.
Test Report
After the completion of the IEC 62108 regulatory compliance standard, each test report includes the following information:
- Title
- Name, date of the test, address and test technician,
- Description and identification of the item(s) tested
- Characterization and condition of each test item.
- Any deviations from, additions to, or exclusions from the test method.
- Measurements, examinations, and derived results supported by tables, graphs, sketches, and photographs
Expert IEC/EN Concentrator Photovoltaic Equipment Compliance Testing
Keystone Compliance assists manufacturers with IEC 62108 and EN 62108 test compliance. Please contact us for more information on how Keystone Compliance can assist you with identifying and fulfilling your IEC 62108 test lab needs. Ready to get started? We are. Request a quote to discuss your product and how we can assist you in achieving IEC 62108 certifications.
In addition to IEC 62108 CPV testing, Keystone has a full scope of expertise including temperature validation, vibration, and high-impact shock. Our team strives to give our customers more time and energy on product development instead of testing. Lastly, Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling.
For more standards on photovoltaic compliance testing, please visit the following pages below: