Presentation Details
| Dual Dependency of Series Resistance in HJT solar modules: Analysis Under Varying Irradiance and Temperature Yuehua Yang, Xin Huang, Tinglin Guo, He Wang, Hong Yang. Xi’an Jiaotong University, Xi’an, China |
Abstract
The series resistance (Rs) of photovoltaic modules varies with temperature and irradiance. But for heterojunction (HJT) solar modules it is not clear how their Rs changes with temperature and irradiance. In this study, the Rs of HJT solar modules were investigated by measuring I–V curves with the irradiance ranging from 200 to 1000 W/m2 and the temperature ranging from 25 to 75 ℃, followed by Rs calculation using the two-characteristic method. The results indicate that under constant temperature conditions, Rs exhibits monotonic reduction with increasing irradiance. At fixed irradiance levels, Rs exhibits a non-monotonic temperature dependence, initially decreasing before increasing with rising temperature, with this trend showing increased stability at higher irradiance levels. The observed Rs behavior stems from distinct mechanisms: irradiance-dependent variations are dominated by absorber layer, while temperature-dependent changes primarily arise from the TCO layer's electrical properties. The results in this study can provide prediction of Rs under different environmental.
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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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