Title:	PV Plant Monitoring Needs Both – Data Analysis and On-Site Inspection
Author(s):	W. Mühleisen, L. Neumaier, J. Kosel, C. Hirschl, R. Rattenberger, P. Prasser
Keywords:	Monitoring, System Performance
Topic:	PV Systems – Modelling, Design, Operation and Performance
Subtopic:	Operation, Performance and Maintenance of PV Systems
Event:	38th European Photovoltaic Solar Energy Conference and Exhibition
Session:	5CV.2.7
Pages:	1193 - 1195
ISBN:	3-936338-78-7
Paper DOI:	10.4229/EUPVSEC20212021-5CV.2.7
Price:	0,00 EUR
Document(s):	paper, poster

Abstract/Summary:

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Photovoltaic systems can be controlled with several approaches. By means of monitoring or with sample measurements on site. On a 9-year-old photovoltaic system with 970 kWp in the south of Austria, both approaches were pursued to investigate whether a cost-effective monitoring analysis alone is sufficient. The identification and partial repair of several superimposed failure cases such as shading, dirt, glass breakage and backsheet cracks ultimately showed that a data analysis with a determined performance ratio alone is not sufficient to draw complete conclusions about PV system and energy yield.