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Research Papers

Lifetime Estimation of a Photovoltaic Module Subjected to Corrosion Due to Damp Heat Testing

[+] Author and Article Information
A. Charki

e-mail: abderafi.charki@univ-angers.fr

D. Bigaud

University of Angers LASQUO-ISTIA,
62 avenue Notre Dame du Lac,
49000 Angers, France

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering. Manuscript received March 10, 2012; final manuscript received November 21, 2012; published online January 7, 2013. Assoc. Editor: Santiago Silvestre.

J. Sol. Energy Eng 135(2), 021010 (Nov 21, 2012) (8 pages) Paper No: SOL-12-1069; doi: 10.1115/1.4023101 History: Received March 10, 2012; Revised November 21, 2012

In this paper, a methodology is presented for estimating the lifetime of a photovoltaic (PV) module. Designers guarantee an acceptable level of power (80% of the initial power) up to 25 yr for solar panels without having sufficient feedback to validate this lifetime. Accelerated life testing (ALT) can be carried out in order to determine the lifetime of the equipment. Severe conditions are used to accelerate the ageing of components and the reliability is then deduced in normal conditions, which are considered to be stochastic rather than constant. Environmental conditions at normal operations are simulated using IEC 61725 standard and meteorological data. The mean lifetime of a crystalline-silicon photovoltaic module that meets the minimum power requirement is estimated. The main results show the influence of lifetime distribution and Peck model parameters on the estimation of the lifetime of a photovoltaic module.

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Figures

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Reliability assessment using accelerated life testing

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Fig. 1

Description of a photovoltaic module

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Fig. 3

Stochastic normal stress

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Fig. 4

Reliability of a component with stochastic stress

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Fig. 5

Analytical profile for daily solar illumination

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Fig. 11

PVMODREL toolbox under SIMULINK®

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Fig. 9

Relative humidity data with HRday centered around zero

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Fig. 10

PVMODREL toolbox developed

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Fig. 6

Measurement data of temperature during November–December

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Fig. 7

Measurement data of temperature with Tday centered around zero

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Fig. 8

Relative humidity data measured for the period of November–December

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Fig. 12

Power rate versus damp heat exposure time for a c-Si module [4]

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