Presentation Details
| Module-Level Performance Loss Rate Estimates for Bifacial and Monofacial PV Modules on Different Soils at a Low-Latitude Site Douglas Lamas1, Giuliano A.Rampinelli1, Juan de la Casa2, Jorge Aguilera2, Emilio Muñoz-Cerón2, Gustavo Nofuentes2. 1Nucleo Tecnologico de Energia Eletrica.Federal University of Santa Catarina, Brazil., Ararangua, Brazil.2PV IDEA Research Group, CEACTEMA, University of Jaén, Spain, Jaen, Spain |
Abstract
This study estimates the performance loss rate (PLR) of monofacial and bifacial photovoltaic modules installed on surfaces with different albedos (Light Sand and White Gravel), using nearly three years of data and the Classical Seasonal Decomposition (CSD) method in a low-latitude site. Bifacial irradiance calculation models were applied through functions from pvlib: pvfactors_timeseries and infinite_sheds. The results indicate that bifacial modules exhibit higher PLRs than monofacial modules, despite generation gains, ranging from −1.74 %·y⁻¹ to −2.26 %·y⁻¹ for bifacial PV and −1.16 %·y⁻¹ to −1.62 %·y⁻¹ for monofacial PV. Increasing the albedo reduced the PLR in both cases, indicating that more reflective surfaces enhance performance stability. The performance decline trends exhibit strong linearity, as shown by coefficients of determination (R²) ranging from 0.66 to 0.95 for the linear trend fits. These results are relevant for feasibility studies and performance warranties in photovoltaic plants, especially in low-latitude regions.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.