Abstract: . . .  al., “Comparison of Module Performance Characterization Methods,” 28 th IEEE PVSC, 2000, pp. 1407-1411. 0 1 2 3 4 5 6 0 2 4 6 8 10 12 14 16 18 20 Volts Am p s 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 300 400 500 600 700 800 900 1000 1100 1200 Wavelength (nm) A b sol u te S p ect r a l R esp on se (A /W ) Solarex mc-Si AstroPower Si-Film Page 3 [3] A. H. Fanney, M. W. Davis and B. P. Dougherty, “Short-Term Characterization of Building Integrated Photovoltaic Modules,” Proceedings of Solar Forum 2002, Reno, NV. [4] A. H. Fanney, M. W. Davis, B. P. Dougherty, D. L. King, W. E. Boyson, and J. A. Kratochvil, “Comparisons of Photovoltaic Performance Measurements,” J. Solar Energy Engineering, 128, 2006, pp. 152-159. [5] http://www.mauisolarsoftware.com Table 1. Comparison of module performance at the Standard Reporting Condition (1000 W/m 2 , AM1.5, 25 o C) using standard ASTM test procedures on multiple days at Sandia and ASU-PTL. Module Type Lab Measurement Date Isc (A) Imp (A) Voc (V) Vmp (V) Pmp (W) FF 9/14/2004 3.531 3.184 21.08 16.07 51.18 0.688 9/15/2004 3.530 3.187 21.11 16.18 51.57 0.692 9/16/2004 3.529 3.190 21.14 16.24 51.81 0.695 9/17/2004 3.546 3.206 21.13 16.23 52.03 0.694 9/22/2004 3.543 3.187 20.94 16.00 50.99 0.688 9/23/2004 . . .
. . .  parameters (coefficients) required by the Sandia performance model. The objective of this work was two fold: (i) implement Sandia’s experimental methodology at ASU-PTL to collect and analyze sunrise- to-sunset module performance data; and (ii) validate Sandia’s performance model by comparing the modeled performance based on analysis of daylong data sets with performance determined using traditional standardized procedures. This paper reports lessons learned as well as the successful completion of this effort. INTRODUCTION Sandia National Laboratories has developed and documented a performance model for photovoltaic power systems that is applicable for all operating conditions [1,2]. The model requires detailed performance parameters determined using a specific outdoor testing procedure also developed by Sandia. The performance model and outdoor measurement procedures have also been validated by the National Institute for Standards and Technology (NIST) [3,4]. A Microsoft Access database of module performance parameters has been initiated by Sandia, and is now widely used by system integrators and in commercial PV system design tools such as PV- DesignPro by Maui Solar Software Corporation [5]. The photovoltaic industry is in need of a commercial . . .
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