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Energies
Volume 18
Issue 1
10.3390/en18010114
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Article

Heterojunction Technology vs. Passivated Emitter and Rear Contact Photovoltaic Panels: Evaluating Efficiency and Profitability Under Challenging Summer Conditions in Lisbon Using Extensive Field Data

by
André Sapina
1 and
Paulo Branco
2,*
1
Instituto Superior Técnico, University of Lisboa, 1049-001 Lisboa, Portugal
2
IDMEC, Instituto Superior Técnico, University of Lisboa, 1049-001 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Energies 2025, 18(1), 114; https://doi.org/10.3390/en18010114
Submission received: 23 October 2024 / Revised: 24 December 2024 / Accepted: 26 December 2024 / Published: 30 December 2024
(This article belongs to the Special Issue Renewable Energy System Technologies: 2nd Edition)
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Abstract

Renewable energy is essential for reducing fossil fuel dependence and achieving carbon neutrality by 2050. This study compares the widely used passivated emitter and rear contact (PERC) cells with advanced heterojunction technology (HJT) cells. Conducted in Lisbon during August 2022, this research evaluates the energy yield of PV installations over 400 W under challenging summer conditions. HJT cells, which combine monocrystalline silicon and amorphous layers, showed a 1.88% higher efficiency and a 3% to 6% increase in energy yield compared to PERC cells. This study also examines the effects of irradiance and temperature on performance using experiment field data. HJT modules are ideal for limited space or power constraints, offering long-term profitability, while PERC modules are more cost-effective for budget-limited projects.
Keywords: passivated emitter and rear contact; heterojunction technology; PERC; HJT; photovoltaic passivated emitter and rear contact; heterojunction technology; PERC; HJT; photovoltaic

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MDPI and ACS Style

Sapina, A.; Branco, P. Heterojunction Technology vs. Passivated Emitter and Rear Contact Photovoltaic Panels: Evaluating Efficiency and Profitability Under Challenging Summer Conditions in Lisbon Using Extensive Field Data. Energies 2025, 18, 114. https://doi.org/10.3390/en18010114

AMA Style

Sapina A, Branco P. Heterojunction Technology vs. Passivated Emitter and Rear Contact Photovoltaic Panels: Evaluating Efficiency and Profitability Under Challenging Summer Conditions in Lisbon Using Extensive Field Data. Energies. 2025; 18(1):114. https://doi.org/10.3390/en18010114

Chicago/Turabian Style

Sapina, André, and Paulo Branco. 2025. "Heterojunction Technology vs. Passivated Emitter and Rear Contact Photovoltaic Panels: Evaluating Efficiency and Profitability Under Challenging Summer Conditions in Lisbon Using Extensive Field Data" Energies 18, no. 1: 114. https://doi.org/10.3390/en18010114

APA Style

Sapina, A., & Branco, P. (2025). Heterojunction Technology vs. Passivated Emitter and Rear Contact Photovoltaic Panels: Evaluating Efficiency and Profitability Under Challenging Summer Conditions in Lisbon Using Extensive Field Data. Energies, 18(1), 114. https://doi.org/10.3390/en18010114

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