Measuring Irradiance for Bifacial PV Systems: Preprint

Michael Gostein, Silvana Pelaez, Christopher Deline, Aron Habte, Clifford Hansen, Bill Marion, Jeff Newmiller, Manajit Sengupta, Joshua Stein, Itai Suez

Research output: Contribution to conferencePaper


The advent of bifacial PV systems drives new requirements for irradiance measurement at PV projects for monitoring and assessment purposes. While there are several approaches, there is still no uniform guidance for what irradiance parameters to measure and for the optimal selection and placement of irradiance sensors at bifacial arrays. Standards are emerging to address these topics but are not yet available. In this paper we review approaches to bifacial irradiance monitoring which are being discussed in the research literature and pursued in early systems, to provide a preliminary guide and framework for developers planning bifacial projects.
Original languageAmerican English
Number of pages11
StatePublished - 2021
Event48th IEEE Photovoltaic Specialists Conference (PVSC 48) -
Duration: 20 Jun 202125 Jun 2021


Conference48th IEEE Photovoltaic Specialists Conference (PVSC 48)

Bibliographical note

See NREL/CP-5K00-81131 for paper as published in proceedings

NREL Publication Number

  • NREL/CP-5K00-80281


  • bifacial
  • irradiance measurement
  • performance analysis
  • photovoltaic systems
  • solar energy


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