Title:	Quantifying Long Term PV Performance and Degradation under Real Outdoor and IEC 61853 Test Conditions Using High Quality Module IV Measurements
Author(s):	S. Ransome, J. Sutterlueti
Keywords:	Energy Rating, Energy Performance, Modelling / Modeling
Topic:	PV Systems and Storage – Modelling, Design, Operation and Performance
Subtopic:	Operation, Performance and Maintenance of PV Systems
Event:	36th European Photovoltaic Solar Energy Conference and Exhibition
Session:	5CV.4.35
Pages:	1640 - 1645
ISBN:	3-936338-60-4
Paper DOI:	10.4229/EUPVSEC20192019-5CV.4.35
Price:	0,00 EUR
Document(s):	paper

Abstract/Summary:

---

Many 3rd party PV performance degradation studies only report changes of PMAX (usually corrected to STC) with time. The type of degradation (e.g. RSHUNT, RSERIES) can cause differences in “PMAX drop vs. instantaneous weather conditions” and also “Energy Yield changes vs. site”. A new approach is given showing how to identify degradation causes and quantify rates vs. time under different weather conditions (outdoor irradiance and module temperature or as defined in IEC 61853-3 e.g. STC, NOCT or LIC). This enables a better insight for any deviations from performance predictions (from simulation programs or machine learning methods) to help for asset monitoring and control.