Solar module quality control before and after sale - ECOPROGETTI - Specialist in photovoltaic production process
Pv module inspection with Ecosun 10L
October 28, 2016
Focus on: PV module testing procedure
October 28, 2016


Solar module quality control is done according to two approaches: in the process of realization and in post sale. The first approach is adopted by the manufacturers and consists of a series of checks on the characteristics of the entire module and / or of the individual strings of cells. Installers and end users instead use the second one, namely the control of already installed solar modules, if there were malfunctions and premature reducing performance. In both cases the machines and tests are very similar, if not overlapping. It ranges from theelectroluminescence test, hi-pot and isolation test, up to the I-V curve measurement with Solar Simulator Ecosun 10L, essential to have a detailed account of the characteristics of the module (maximum power, maximum current and voltage, Fill Factor and other parameters).

To distinguish the before and after sale solar modules quality control is the way the procedure is performed. During the realization we have in fact the possibility of integrating the machinery for the test within the production line, typically at the end of cycle. It happens, for example, to 4 lines Ecoprogetti with capacity of 20, 45, 70 and 100 MW / year, with the electroluminescence tester solar simulator Ecosun 10L included in the line. If, however, we need quality control of solar modules in function, then we must use a mobile laboratory. This is a van equipped with the solar simulator Ecosun10L and with the equipment to perform the tests in electroluminescence, as well as various portable devices for a wide range of investigations. All extremely quickly and with maximum precision.


The tests for solar module quality control allow to identify numerous issues. Among the principal we remember in random order delamination of encapsulating polymer due to poor prime material quality or to a production process not properly calibrated, the yellowing of the encapsulant, phenomenon of potential induced degradation (P.I.D. effect) and the unnoticed cell breakages. Recognizing on time these defects is the best strategy to ensure the value of the modules sold or to restore full operation of the PV system. Contact us now via email or phone and ask more information without any commitment!

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