Wednesday, May 1

Welcome & Introduction: Why Are We Here? 1:00 pm

An overview of the workshop will be presented, along with intended outcomes, goals and next steps.

	Welcome and Purpose	Joshua Stein	Sandia National Laboratories
	Summary of Previous Workshop	Chris Cameron	Independent Consultant

 

Module Models (1): Generating Performance Coefficients 1:30 pm

The selection of a module performance algorithm and associated module performance coefficients is a critical step in modeling system performance. These presentations will emphasize the process for deriving performance coefficients from test data.

	User Experience with Module Performance Coefficients	Bradley Hibberd	Borrego Solar
	Generating Module Coefficients for Sandia Array Performance Model	Cliff Hansen	Sandia National Laboratories
	Generating Module Coefficients for SAM/CEC n-parameter model	Aron Dobos	National Renewable Energy Laboratory
	Generating Module Coefficients for PVsyst	Monali Joshi and Evan Riley	Black & Veatch
	Generating Module Coefficients for PVsyst and PV*SOL	Ken Sauer	Yingli Green Energy Americas

Module Models (2) 3:00 pm

	Changes in Module Performance Coefficient Generation for PVsyst Version 6	André Mermoud	PVsyst
	Generating Module Coefficients: Blind Study Results	Cliff Hansen	Sandia National Laboratories
	Performance Matrices per IEC 61853 Standards: Their Importance for the Energy Estimation Models	Mani G. TamizhMani	ASU PRL and TUV Rheinland PTL
	The Sensitivity and Limitations of Present and Alternative PV Models	Steve Ransome	SRCL

PV System Performance Models 7:00 pm

Developers of system models will present overviews or demonstrations of their models.

	PVsyst (Note: This was a live demonstration of the software, no file)	André Mermoud	PVsyst
	HelioScope	Paul Grana	Folsom Labs
	PVSim	Ben Bourne	SunPower Corporation
	System Advisor Model  (SAM)	Aron Dobos and Nate Blair	National Renewable Energy Laboratory
	PV*SOL Expert	Bernhard Gatzka	Valentin Software

Thursday, May 2

Solar Resource Data 8:00 am

The expected solar resource at a site is critical to establishing project viability. This session will present methods to reduce project risk by addressing bias and uncertainty in solar resource data.

	A Review of Measured/Modeled Solar Resource Uncertainty	Thomas Stoffel	National Renewable Energy Laboratory
	Reducing Solar Resource Error Through On-Site Monitoring	Marie Schnitzer	AWS Truepower
	Quantifying Uncertainty in Solar Energy Estimates	Kevin Lang	SAIC
	Flexible Methods for Deriving POA Irradiance	Ben Bourne	SunPower Corporation
	Diffuse Irradiance and Backtracking in Tracker Systems	Bodo Littman	First Solar

System Losses and Derates 10:15 am

Estimates of system losses vary greatly among models and modelers. This session will seek to improve our understanding of system losses and the means of modeling them.

	Draft Definitions of System Loss Factors (Note: Both of Geoff’s presentations are merged into a single file)	Geoff Klise	Sandia National Laboratories
	Quantifying Mismatch Losses in Small Arrays	Sara MacAlpine	University of Colorado, Boulder
	Calculation of Mismatch Losses due to Shading in PVsyst, v6	André Mermoud	PVsyst
	Modeling Mismatch Losses in HelioScope	Paul Gibbs	Folsom Labs
	Calculating Model Shading Inputs from Design Data	Tarn Yates	Borrego Solar

System Losses and Derates (continued) 12:45 pm

Panel Discussion: System Losses and Derates

	System Losses and Derates in PVSim: Balance of System Loss Modeling	Jeff Roche	SunPower Corporation
	Working with Component Based Loss Factors	Paul Gibbs	Folsom Labs
	Effects of Snowfall on PV Systems	Rob Andrews	Queens University and Calama Consulting
	System Loss Considerations	Alex Panchula	First Solar

Performance Degradation

	Modeling Module Power Degradation	Thomas Roessler	Yingli Green Energy Europe
	Fleet-Wide Study of System Degradation	Mike Anderson	SunPower Corporation
	Standardizing Definitions: Survey Results and Inputs to the Working Group (Available as part of previous presentation file from Geoff Klise in System Derates)	Geoff Klise	Sandia National Laboratories

Modeling for the Real World 3:00 pm

	Modeling Needs for Performance Guarantees	Alex Panchula	First Solar
	Model Validation Methodology and Results	Jeff Roche	SunPower Corporation
	Improving PV Performance Models using Real World Data	Jürgen Sutterlueti	TEL Solar
	Climatically Diverse Data Set for Flat-Plate PV Module Model Validations	Bill Marion	National Renewable Energy Laboratory
	Standards for Acceptance Testing and Model Validation	Evan Riley	Black & Veatch

Discussion and Wrap-Up 4:30 pm

Wrap-Up and Next Steps

Cliff Hansen and Joshua Stein

Sandia National Laboratories

Audio files are provided with the permission of the speaker.  We would like to thank Pramod Krishnani (Belectric) for making the recordings and preparing the files for distribution.