Real-world PV Module Degradation across Climate Zones Determined from Suns-Voc, Loss Factors and I-V Steps Analysis of Eight Years of I-V, Pmp Time-series Datastreams

Jiqi Liu; Menghong Wang; Alan J. Curran; Ahmad Maroof Karimi; Wei Heng Huang; Erdmut Schnabel; Michael Kohl; Jennifer L. Braid; Roger H. French

doi:10.1109/PVSC40753.2019.8980541

Real-world PV Module Degradation across Climate Zones Determined from Suns-V_oc, Loss Factors and I-V Steps Analysis of Eight Years of I-V, P_mp Time-series Datastreams

Jiqi Liu, Menghong Wang, Alan J. Curran, Ahmad Maroof Karimi, Wei Heng Huang, Erdmut Schnabel, Michael Kohl, Jennifer L. Braid, Roger H. French

Analytics and AI Methods at Scale

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

6 Scopus citations

Abstract

We report here on performance and mechanistic degradation analysis of 8 years of I-V, P_mp time-series for eight commercial crystalline silicon photovoltaic (PV) modules, located in three distinct climate zones. A data-driven algorithm has been applied to extract I-V features and detect steps in 3.2 million I-V curves. Using the Y ear-on-Y ear determined linear PLR, we found that one brand F (glass-backsheet) module has a much greater (more negative) PLR than another brand G (double glass) in BWh hot desert climate zone. BSh hot semi-arid is shown to be the most aggressive climate zone of the three in which modules were fielded, the third being ET tundra climate. The mechanisms causing most significant power loss for modules in BWh, BSh and ET climate zones are current mismatch (shading), cell shunting, and series resistance, respectively based on Analytic Suns-V_oc analysis derived from outdoor I-V curves. Using steps observed in the I-V curves of the systems we are also able to identify and characterize the shading of specific modules.

Original language	English
Title of host publication	2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	680-686
Number of pages	7
ISBN (Electronic)	9781728104942
DOIs	https://doi.org/10.1109/PVSC40753.2019.8980541
State	Published - Jun 2019
Event	46th IEEE Photovoltaic Specialists Conference, PVSC 2019 - Chicago, United States Duration: Jun 16 2019 → Jun 21 2019

Publication series

Name	Conference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)	0160-8371

Conference

Conference	46th IEEE Photovoltaic Specialists Conference, PVSC 2019
Country/Territory	United States
City	Chicago
Period	06/16/19 → 06/21/19

Funding

This material is based upon work supported by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under Solar Energy Technologies Office (SETO) Agreement Number DE-EE0007140. This work made use of the Rider High Performance Computing Resource in the Core Facility for Advanced Research Computing at Case Western Reserve University.

Keywords

Degradation
I-V Time Series
I-V curve
Shading
Steps
Suns-V

Access to Document

10.1109/PVSC40753.2019.8980541

Cite this

Liu, J., Wang, M., Curran, A. J., Maroof Karimi, A., Huang, W. H., Schnabel, E., Kohl, M., Braid, J. L., & French, R. H. (2019). Real-world PV Module Degradation across Climate Zones Determined from Suns-V_oc, Loss Factors and I-V Steps Analysis of Eight Years of I-V, P_mp Time-series Datastreams. In 2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019 (pp. 680-686). Article 8980541 (Conference Record of the IEEE Photovoltaic Specialists Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC40753.2019.8980541

Liu, Jiqi ; Wang, Menghong ; Curran, Alan J. et al. / Real-world PV Module Degradation across Climate Zones Determined from Suns-V_oc, Loss Factors and I-V Steps Analysis of Eight Years of I-V, P_mp Time-series Datastreams. 2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019. Institute of Electrical and Electronics Engineers Inc., 2019. pp. 680-686 (Conference Record of the IEEE Photovoltaic Specialists Conference).

@inproceedings{5dc37d7da55646399261abdb6ae57bf2,

title = "Real-world PV Module Degradation across Climate Zones Determined from Suns-Voc, Loss Factors and I-V Steps Analysis of Eight Years of I-V, Pmp Time-series Datastreams",

abstract = "We report here on performance and mechanistic degradation analysis of 8 years of I-V, Pmp time-series for eight commercial crystalline silicon photovoltaic (PV) modules, located in three distinct climate zones. A data-driven algorithm has been applied to extract I-V features and detect steps in 3.2 million I-V curves. Using the Y ear-on-Y ear determined linear PLR, we found that one brand F (glass-backsheet) module has a much greater (more negative) PLR than another brand G (double glass) in BWh hot desert climate zone. BSh hot semi-arid is shown to be the most aggressive climate zone of the three in which modules were fielded, the third being ET tundra climate. The mechanisms causing most significant power loss for modules in BWh, BSh and ET climate zones are current mismatch (shading), cell shunting, and series resistance, respectively based on Analytic Suns-Voc analysis derived from outdoor I-V curves. Using steps observed in the I-V curves of the systems we are also able to identify and characterize the shading of specific modules.",

keywords = "Degradation, I-V Time Series, I-V curve, Shading, Steps, Suns-V",

author = "Jiqi Liu and Menghong Wang and Curran, {Alan J.} and {Maroof Karimi}, Ahmad and Huang, {Wei Heng} and Erdmut Schnabel and Michael Kohl and Braid, {Jennifer L.} and French, {Roger H.}",

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Liu, J, Wang, M, Curran, AJ, Maroof Karimi, A, Huang, WH, Schnabel, E, Kohl, M, Braid, JL & French, RH 2019, Real-world PV Module Degradation across Climate Zones Determined from Suns-V_oc, Loss Factors and I-V Steps Analysis of Eight Years of I-V, P_mp Time-series Datastreams. in 2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019., 8980541, Conference Record of the IEEE Photovoltaic Specialists Conference, Institute of Electrical and Electronics Engineers Inc., pp. 680-686, 46th IEEE Photovoltaic Specialists Conference, PVSC 2019, Chicago, United States, 06/16/19. https://doi.org/10.1109/PVSC40753.2019.8980541

Real-world PV Module Degradation across Climate Zones Determined from Suns-V_oc, Loss Factors and I-V Steps Analysis of Eight Years of I-V, P_mp Time-series Datastreams. / Liu, Jiqi; Wang, Menghong; Curran, Alan J. et al.
2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 680-686 8980541 (Conference Record of the IEEE Photovoltaic Specialists Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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Liu J, Wang M, Curran AJ, Maroof Karimi A, Huang WH, Schnabel E et al. Real-world PV Module Degradation across Climate Zones Determined from Suns-V_oc, Loss Factors and I-V Steps Analysis of Eight Years of I-V, P_mp Time-series Datastreams. In 2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019. Institute of Electrical and Electronics Engineers Inc. 2019. p. 680-686. 8980541. (Conference Record of the IEEE Photovoltaic Specialists Conference). doi: 10.1109/PVSC40753.2019.8980541