Presentation Details
| Bankability Assessment of TOPCon Photovoltaic Modules Through Extended Reliability Testing Mengdi Liu1, Eleanor Lee2, Wenhao Xu1, Yating Zhang1, Giorgio Bardizza3, Max Koentopp4, Christos Monokroussos1. 1TÜV Rheinland (Shanghai) Co., Ltd., Shanghai, China.2TÜV Rheinland (Taiwan) Ltd., Taipei, Taiwan.3TÜV Rheinland (Italy), Pogliano Milanese, Italy.4TÜV Rheinland Solar GmbH, Cologne, Germany |
Abstract
This study presents a comprehensive bankability assessment framework for tunnel oxide passivated contact (TOPCon) photovoltaic modules, integrating extended reliability testing with a quantitative scoring methodology. Six TOPCon module manufacturers (F1-F6) were evaluated using a battery of accelerated tests derived from IEC standards. Test results revealed significant performance variation among manufacturers, with thermal cycling degradation ranging from 0.43% to 4.97%, damp heat degradation from 0.53% to 4.68%, and ultraviolet degradation from 0.95% to 2.97%. A weighted scoring system with differential weight factors translated test data into bankability scores ranging from 64.8 to 83.2 on a 0-100 scale. The framework enables quantitative comparison of manufacturer reliability, supports climate-specific deployment recommendations, and provides empirical data for risk-adjusted financial modeling in photovoltaic project financing.
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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.
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