RT info:eu-repo/semantics/article
T1 Electroluminescence inspections of PV modules and strings by a self-powering configuration in daylight mode
A1 Terrados, C.
A1 González-Francés, D.
A1 Sulca, K.P.
A1 Alonso, V.
A1 González, M.A.
A1 Martínez, O.
K1 Solar cell defects
K1 Daylight electroluminescence
K1 dEL imaging
K1 PV module diagnostics
K1 On-site inspection
K1 Self-powering
K1 2210 Química Física
AB Electroluminescence (EL) imaging is a widely used tool for identifying defects in the solar cells of photovoltaic(PV) modules. Traditional EL inspections require dark conditions and module disassembly, making them costlyand logistically challenging. Daylight Electroluminescence (dEL) has emerged as a cost-effective alternative,enabling on-site inspections under any irradiance conditions without module dismounting and thereby reducingcosts. However, EL inspections require current injection, necessitating an external power source. Solutions likebidirectional inverters have been proposed to address this challenge. This study proposes a novel self-powereddEL methodology that uses other PV strings in the plant to supply the necessary current. The method employsa switching procedure to filter ambient light and allows entire string inspection without dismounting modules orusing external power. Field tests across various irradiance conditions show that the resulting images are com-parable to those obtained in controlled darkroom environments, validating the method’s effectiveness andoperational advantages.
PB Elsevier
SN 0038-092X
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/78657
UL https://uvadoc.uva.es/handle/10324/78657
LA eng
NO Solar Energy, 2025, vol. 301, p. 113913
NO Producción Científica
DS UVaDOC
RD 16-oct-2025