Accelerated TC Test in Comparison with Standard TC Test for PV Modules with Ribbon, Wire and Shingle Interconnection

Neuhaus, D.H.; Kraft, Achim; Mülhöfer, G.; Eberlein, D.; Rendler, L.C.; Schiller, Carsten

doi:10.4229/eupvsec20192019-4av.1.8

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…During the TC test, the I-V characteristics of the PV module were measured after every 100 cycles until 1400 cycles, and the results are summarized in Figure 6 and Table 2. Compared to the DH7000 test results in Figure 3, the effect of TC1400 on the degradation of the module performance can be considered less significant [16]. Please note that the relative scales of the y1 and y2-axes in Figures 3 and 6 are identical.…”

Section: Performance Evaluation Of Pv Module By Temperature Cycle Testmentioning

confidence: 84%

Performance Evaluation of Photovoltaic Modules by Combined Damp Heat and Temperature Cycle Test

Park¹,

So²,

Kim³

2021

Energies

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Standard damp heat (DH), temperature cycle (TC), and combined DH-TC tests were performed using monocrystalline Si 72-cell modules with a conventional ethylene vinyl acetate (EVA) encapsulant, and their module performance and electroluminescence images were investigated. During the DH test, a significant drop (~20%) in the maximum output power of the module was noticed, primarily because of the degradation of fill factor and an increase in series resistance at 5500 h of DH testing (DH5500), presumably due to the corrosion of metal electrodes by moisture ingress. Conversely, it was revealed that temperature cycling did not seriously degrade module performance until 1400 cycles. However, the combined DH5000-TC600 test suggested in this study, with a sequence of DH1000-TC200-DH1000-TC200-DH1000-TC200-DH2000, was confirmed to provide harsher conditions than the DH-only test by causing a 20% decrease in maximum output power (Pmax) after DH3000/TC400. Promisingly, we confirmed that the module with a polyolefin elastomer encapsulant showed better durability than the module with EVA even in the combined DH-TC test, showing a limited decrease in Pmax (~10%) even after the DH5500/TC600 test.

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Section: Performance Evaluation Of Pv Module By Temperature Cycle Testmentioning

confidence: 84%

Performance Evaluation of Photovoltaic Modules by Combined Damp Heat and Temperature Cycle Test

Park¹,

So²,

Kim³

2021

Energies

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Influence and mitigation of interference by LID and LETID in damp heat and thermal cycling tests on PV modules

Fokuhl

Mülhöfer

Wesselak

et al. 2022

Journal of Renewable and Sustainable Energy

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Accelerated aging tests as defined in testing standards such as IEC 61215 are important to assure quality and safety of photovoltaic (PV) modules. The test conditions often contain high temperatures and sometimes carrier injection, which can cause light induced degradation (LID) effects, such as boron-oxygen LID (BO LID) or light and elevated temperature induced degradation (LETID). These effects can interfere with the interpretation of results or produce false fails or passes in certification tests. To address the most severe cases, an option for a regeneration procedure for BO LID after damp heat was recently included into IEC 61215:2021. However, positive performance deviations due to BO LID, as well as general influence of LETID are still not excluded. Variations of damp heat and thermal cycling tests on mini-modules built from monocrystalline passivated emitter and rear cells (PERC) are performed and combined with latest approaches for BO LID regeneration, BO degradation and LETID temporary recovery. The results show that LETID can superimpose procedures applied for BO LID regeneration but can be easily temporary recovered by one additional step. A combined stabilization procedure, which can exclude influences from both BO LID and LETID on accelerated aging test results, is proposed.

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Accelerated TC Test in Comparison with Standard TC Test for PV Modules with Ribbon, Wire and Shingle Interconnection

Cited by 2 publications

References 4 publications

Performance Evaluation of Photovoltaic Modules by Combined Damp Heat and Temperature Cycle Test

Performance Evaluation of Photovoltaic Modules by Combined Damp Heat and Temperature Cycle Test

Influence and mitigation of interference by LID and LETID in damp heat and thermal cycling tests on PV modules

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