Susceptibility to polarization type potential induced degradation in commercial bifacial p-PERC PV modules

Mahmood, Farrukh ibne; Li, Fang; Hacke, Peter; Molto, Cécile; Colvin, Dylan; Seigneur, Hubert; TamizhMani, Govindasamy

doi:10.1002/pip.3724

Susceptibility to polarization type potential induced degradation in commercial bifacial p-PERC PV modules

Journal Article · Tue Jun 20 00:00:00 EDT 2023 · Progress in Photovoltaics

DOI:https://doi.org/10.1002/pip.3724· OSTI ID:1992031

^[1]; ^[1]; ^[2]; Molto, Cécile ^[3]; Colvin, Dylan ^[3]; ^[3]; TamizhMani, Govindasamy ^[1]

Arizona State Univ., Mesa, AZ (United States)
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Univ. of Central Florida, Orlando, FL (United States)

Potential induced degradation (PID) is a reliability issue affecting photovoltaic (PV) modules, mainly when PV strings operate under high voltages in hot/humid conditions. Polarization-type PID (PID-p) has been known to decrease module performance quickly. PID-p can be reduced or recovered under the light in some cases, but this effect, as expected, would be less pronounced on the rear side of bifacial PV modules receiving lower irradiance. As bifacial PV modules are projected to dominate the PV market within the next 10 years, it is crucial to understand the PID-p issue in bifacial modules better. In this study, we performed indoor PID testing to induce PID-p on 14 commercial bifacial p-PERC modules with three different module constructions from three manufacturers. Here, four rounds (+ve and –ve polarities for front and rear sides) of PID testing are done at 25°C, 54% relative humidity (RH) for 168 h using the aluminum foil method. Each module side (front cell side and back cell side) is tested individually under both negative and positive voltage bias. The results show that the highest degradation of 32% in maximum power (Pmax) at standard test conditions (1000 W/m²) and 51% at low irradiance (200 W/m²) has been observed in some cases. Recovery under sunlight is also done, and outcomes show a near-complete recovery in Pmax. This study presents an extensive experimental methodology and a detailed analysis to systematically and simultaneously/sequentially evaluate multiple construction types of bifacial modules to the PID-p susceptibility and recovery.

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC36-08GO28308; EE0009345

OSTI ID:: 1992031

Alternate ID(s):: OSTI ID: 1985932

Report Number(s):: NREL/JA--5K00-86498; MainId:87271; UUID:07b8b73e-f1ac-4896-a6c7-5015b78a9ecc; MainAdminID:69990

Journal Information:: Progress in Photovoltaics, Journal Name: Progress in Photovoltaics Journal Issue: 11 Vol. 31; ISSN 1062-7995

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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