EU PVSEC Programme Online
EU PVSEC 2021, 6 - 10 September 2021
Presentation: 4BO.2.4 Energy Contribution of Rear-Side Irradiance for Bifacial Photovoltaic Modules
Type: Oral
Date: Tuesday, 7th September 2021
10:30 - 12:00
Author(s): G.L. Martins, S. Dittmann, C.D. Rodríguez-Gallegos, H. Park, S.-Y. Oh, W.K. Kim, L. Burnham, B.W. Figgis, R. Rüther, R. Gottschalg
Presenter / Speaker: G.L. Martins, Anhalt University of Applied Sciences, Köthen, Germany
Event: Conference Conference
Session: 4BO.2 PV Module Outdoor Performance and Energy Rating
Topic: 4. 1 PV Module Design, Manufacture, Performance and Reliability
Keywords: PV Module, Bifacial, Albedo
Summary / Abstract: Bifacial Photovoltaic (PV) modules are up taking an important market share of PV industry in the next few years. Rear surface irradiance modeling imposes significant challenges, as it lacks in reliable and standardized datasets. Besides, irradiance contribution and distribution depend highly on location and mounting conditions. A standardized methodology was developed and applied to characterize rear irradiance behavior using on-site measured data. Data from seven test sites within the PV CAMPER collaborative were evaluated including different albedo scenarios. It was found that surplus energy can vary between 6% - 60%, depending on the ground substrate and site location. As expected, latitude has great influence on horizontal overall (front + rear) irradiance distribution, while rear-side Plane-of-Array (POA) tends to concentrate energy contribution in the higher front-side irradiance ranges. In addition, it was observed that idiosyncratic climate conditions, such as desert environment and snow season, have a strong effect in rear irradiance distribution, thus a very relevant aspect of Bifacial PV prospections.