@inproceedings{0f602a919f2b4e4dad2c2242f90cd7e5,
title = "I-V curves and visual inspection of 250 PV modules deployed over 2 years in tucson",
abstract = "To study degradation of PV systems, we measured current-voltage (I-V) curves from 250 modules that have been deployed in grid-tied systems for 2 to 12 years in Arizona. We also documented visual signs of weathering. The I-V curves exhibit a variety of imperfections and considerable dispersion of Pmax values. Although many of these modules appear weathered, we found few significant correlations between visible signs of weathering and lower Pmax values, and the most degraded modules have no correlation between visual defects and performance. This indicates that important forms of degradation can remain hidden to the eye.",
keywords = "PV degradation, PV efficiency, current-voltage characteristics, field testing",
author = "Kopp, {Emily S.} and Lonij, {Vincent P.} and Brooks, {Adria E.} and Hidalgo-Gonzalez, {Patricia L.} and Cronin, {Alexander D.}",
year = "2012",
doi = "10.1109/PVSC.2012.6318251",
language = "English (US)",
isbn = "9781467300643",
series = "Conference Record of the IEEE Photovoltaic Specialists Conference",
pages = "3166--3171",
booktitle = "Program - 38th IEEE Photovoltaic Specialists Conference, PVSC 2012",
note = "38th IEEE Photovoltaic Specialists Conference, PVSC 2012 ; Conference date: 03-06-2012 Through 08-06-2012",
}