Title:	Interaction of PV-Modules and Tracker Structure
Author(s):	B. Sauer, F. Gross, T. Moschner, M. Balz, G. Weinrebe, A. Oschatz
Keywords:	Qualification and Testing, Reliability, Stability, Tracking, PV Module
Topic:	Photovoltaic Modules and BoS Components
Subtopic:	Balance of System Components
Event:	8th World Conference on Photovoltaic Energy Conversion
Session:	3DV.1.47
ISBN:	3-936338-86-8
Price:	0,00 EUR
Document(s):	poster

Abstract/Summary:

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Loads allowed for PV modules are defined as static loads assuming modules are supported in a perfect plane. Reality is different: PV trackers are flexible structures that deform under wind loads. This mismatch needs to be addressed. As PV modules are mechanically coupled to the tracker support structure, they exert loads and stress on each other. Wind loads create stress in the module. A meaningful analysis must consider the actual attachment of the modules to the structure, be it by a short bracket or a long purlin with supporting struts. Trackers are designed for a variety of modules. Therefore, the interface between tracker structure and modules must be clearly defined. A straightforward option is that tracker suppliers specify maximum out-of-plane deformations of tracker structure during operation and in safety position, and the module suppliers define maximum allowable module deformation. Integrators of tracker structure and modules must then make sure that both values match.