Presentation Details
| Exploring discrepancies between indoor degradation rates and outdoor performance loss rates in photovoltaics Norman Jost1, Bruce King1, Dirk Jordan2, Marios Theristis1. 1Sandia National Laboratories, Albuquerque, NM, USA.2National Laboratory of the Rockies, Golden, CO, USA |
Abstract
Innovation in PV module technology has increased efficiency and reduced cost, solar cell technologies have switched from Al-BSF to PERC to TOPCon and HJT. These rapid changes and cost reductions raise the question of module reliability. Furthermore, the industry uses the terms degradation (Rd) and performance loss rates (PLR) interchangeable, overlooking that Rd reflects module aging while PLR captures all operational and environmental impacts on production. In this study we are looking at Sandia’s long-term experiments with a sample of ~700 different module technologies. We compute PLR based on continuous outdoor measurements and Rd based on discrete indoor measurements from our yearly flash test campaign. Electroluminescence imaging is leveraged to identify causes of degradation. In the full paper, we will present differences between PLR and Rd, as well as the causes of such differences.
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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.