UL 62108:2017-06 Concentrator Photovoltaic (CPV) Modules and Assemblies一Design Qualification and Type Approval.
3.2 concentrator cell basic photovoltaic device that is used under the illumination of concentrated sunlight
3.3 concentrator optics optical device that performs one or more of the following functions from its
input to output: increasing the light intensity, filtering the spectrum, modifying light intensity distribution, or changing light direction. Typically, it is a lens or a mirror
Note 1 to entry: A primary optics receives unconcentrated sunlight directly from the sun. A secondary optics receives concentrated or modified sunlight from another optical device, such as primary optics or another secondary optics.
3.4 concentrator receiver group of one or more concentrator cells and secondary optics (if present)
that accepts concentrated sunlight and incorporates the means for thermal and electric energy transfer.
A receiver could be made of several sub-receivers. The sub-receiver is a physically stand-alone, smaller
portion of the full-size receiver
3.5 concentrator module group of receivers, optics, and other related components, such as
interconnection and mounting, that accepts unconcentrated sunlight. All above components are usually prefabricated as one unit, and the focus point is not field adjustable
Note 1 to entry: A module could be made of several sub-modules. The sub-module is a physically stand-alone, smaller portion of the full-size module.
3.6 concentrator assembly group of receivers, optics, and other related components, such as interconnection and mounting, that accepts unconcentrated sunlight. All above components would
usually be shipped separately and need some field installation, and the focus point is field adjustable
Note 1 to entry: An assembly could be made of several sub-assemblies. The sub-assembly is a physically standalone, smaller portion of the full-size assembly.
3.7 control unit hardware that is not stressed, but is included in each measurement to enable greater
confidence in consistent measurements
4 Sampling
Figures from Figures 1 to 5 are schematics of cells, receivers, modules, and assemblies.
For non-field-adjustable focus-point CPV systems or modules, 7 modules and 2 receivers are required to complete all the specified tests, plus one receiver for the bypass/blocking diode thermal test (intrusive or non-intrusive). For details, see Figure 6. For field-adjustable focuspoint CPV systems or assemblies, 9 receivers (including secondary optics sections, if applicable) and 7 primary optics sections are required to complete all the specified tests, plus one receiver for the bypassfblocking diode thermal test (intrusive or non-intrusive). For details, see 7.
In the case that a full-size module or assembly is too large to fit into available testing equipment, such as environmental chambers, or a full-size module or assembly is too expensive (e.g., for a 20 kW reflective dish concentrator system, 9 receiver samples account for 180 kW of PV cells), a smaller representative sample can be used. However, even if representative samples are used for the other test, a full-size module or assembly shall be installed and tested for outdoor exposure. This can be conducted either in the testing lab, or through on-site witness.UL 62108 pdf download.