The effect of encapsulant discoloration and delamination on the electrical characteristics of photovoltaic module

Park, N.C.; Jeong, Jaeseong; Kang, Byungjun; Kim, D.H.

doi:10.1016/j.microrel.2013.07.062

Cited by 103 publications

(47 citation statements)

References 16 publications

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“…There are some indirect effects of discoloration, which also contribute in efficiency reduction. EVA degradation leads to the production of acetic acid and other volatile gases, which get trapped within the module at different interfaces, causing the delamination or bubbles formation that reduces the performance and reliability [6,7]. The acetic acid attacks the metallic contacts of solar cells and causes corrosion, which increases its series resistance (R s ) and ultimately reduces the power yield [8].…”

Section: Introductionmentioning

confidence: 99%

Nondestructive characterization of encapsulant discoloration effects in crystalline-silicon PV modules

Sinha

Sastry

Gupta

2016

Solar Energy Materials and Solar Cells

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Section: Introductionmentioning

confidence: 99%

Nondestructive characterization of encapsulant discoloration effects in crystalline-silicon PV modules

Sinha

Sastry

Gupta

2016

Solar Energy Materials and Solar Cells

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“…Optical losses can occur due to a series of factors that affect the optical layer of the PV module and reduce the amount of light reaching the cell surface. The most common of these factors are: soiling and shading , encapsulant discoloration or delamination , front‐glass corrosion or breakage , and deterioration of the antireflection coating . Factors causing optical losses leave a visual impact on the PV module's surface and can be relatively easily detected through visual inspection .…”

Section: Introductionmentioning

confidence: 99%

Fault identification in crystalline silicon PV modules by complementary analysis of the light and dark current–voltage characteristics

Spataru

Séra

Hacke

et al. 2015

Progress in Photovoltaics

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This article proposes a fault identification method, based on the complementary analysis of the light and dark currentvoltage (I-V) characteristics of the photovoltaic (PV) module, to distinguish between four important degradation modes that lead to power loss in PV modules: (i) degradation of the electrical circuit of the PV module (cell interconnect breaks; corrosion of the junction box, module cables, and connectors); (ii) mechanical damage to the solar cells (cell microcracks and fractures); (iii) potential-induced degradation (PID) sustained by the module; and (iv) optical losses affecting the module (soiling, shading, and discoloration). The premise of the proposed method is that different degradation modes affect the light and dark I-V characteristics of the PV module in different ways, leaving distinct signatures. This work focuses on identifying and correlating these specific signatures present in the light and dark I-V measurements to specific degradation modes; a number of new dark I-V diagnostic parameters are proposed to quantify these signatures. The experimental results show that these dark I-V diagnostic parameters, complemented by light I-V performance and series-resistance measurements, can accurately detect and identify the four degradation modes discussed.

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“…Cross-sectional analysis was performed on a 25-year-aged crystalline silicon PV module. The information regarding this PV module was reported in previous research [21]. The results of the analysis revealed that both Sn and Pb can undergo severe corrosion in PV modules over time, as shown in Figure 1.…”

Section: Corrosion Mechanism Of Solder Interconnectionsmentioning

confidence: 68%

Study on Mitigation Method of Solder Corrosion for Crystalline Silicon Photovoltaic Modules

Kim

Park

Kim

et al. 2014

International Journal of Photoenergy

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The corrosion of 62Sn36Pb2Ag solder connections poses serious difficulties for outdoor-exposed photovoltaic (PV) modules, as connection degradation contributes to the increase in series resistance (RS) of PV modules. In this study, we investigated a corrosion mitigation method based on the corrosion mechanism. The effect of added sacrificial metal on the reliability of PV modules was evaluated using the oxidation-reduction (redox) reaction under damp heat (DH) conditions. Experimental results after exposure to DH show that the main reason for the decrease in power was a drop in the module’s fill factor. This drop was attributed to the increase ofRS. The drop in output power of the PV module without added sacrificial metal is greater than that of the sample with sacrificial metal. Electroluminescence and current-voltage mapping analysis also show that the PV module with sacrificial metal experienced less degradation than the sample without sacrificial metal.

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The effect of encapsulant discoloration and delamination on the electrical characteristics of photovoltaic module

Cited by 103 publications

References 16 publications

Nondestructive characterization of encapsulant discoloration effects in crystalline-silicon PV modules

Nondestructive characterization of encapsulant discoloration effects in crystalline-silicon PV modules

Fault identification in crystalline silicon PV modules by complementary analysis of the light and dark current–voltage characteristics

Study on Mitigation Method of Solder Corrosion for Crystalline Silicon Photovoltaic Modules

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