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2025 Vol.13, Issue 4 Preview Page
Analysis of Power Degradation and Status of Defect with Long Term Operation in Floating Photovoltaic

수상 태양광 장기 운영에 따른 불량 현황 및 출력 영향성 분석

Jieun Lee1*
,
Ji woo Sohn2
,
Hyunsik Jo1
,
Jungi Jeong1
,
Won-wook Oh3
,
Changsub Won4
,
Donghwan Kim2
이 지은1*
,
손 지우2
,
조 현식1
,
정 준기1
,
오 원욱3
,
원 창섭4
,
김 동환2
1Water Energy research Team, Korea water coporation, Daejeon, 34045, Korea
2Solar Energy research Center, Korea University, Seoul, 02841, Korea
3Photovoltaic technical center, Chungbuk technopark, Jincheon, 28116, Korea
4MireaSP, Seoul, 05854, Korea
1물에너지연구소, 한국수자원공사, 대전, 34045
2태양광연구실, 고려대학교, 서울, 02841
3태양광기술센터, 충북테크노파크, 진천, 28116
4미래SP, 서울, 05854
*Corresponding Author
31 December 2025. pp. 171-178
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Abstract

Photovoltaic (PV) technology is increasingly recognized as a key contributor to the global clean energy transition, highlighting the critical importance of long-term module reliability. While Floating PV (FPV) systems are expected to exhibit degradation behaviors similar to ground-mounted systems, systematic field data on FPV module failures and performance impacts remain limited. In this study, FPV modules that had been in continuous operation for 13 years were analyzed to assess power degradation rates and failure modes, and to compare them with those of terrestrial PV systems. The results indicate that electrode corrosion accounted for 39% of observed defects. Notably, the average power degradation rate of FPV modules was 0.07%/yr, lower than typical values reported for land-based PV installations. This outcome suggests that although electrode corrosion increases series resistance, at the same time, it elevates parallel resistance, thereby contributing to enhanced durability under aquatic operating conditions. These findings provide novel insights into the long-term reliability of FPV systems and underscore the necessity of incorporating environment-specific degradation mechanisms into future module design and reliability assessment frameworks.

Keywords
Floating Photovoltaic
Long term operation
Power degradation
Corrosion
Series resistance
Shunt resistance
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Information
  • Publisher :Korea Photovoltaic Society
  • Publisher(Ko) :한국태양광발전학회
  • Journal Title :Current Photovoltaic Research
  • Volume : 13
  • No :4
  • Pages :171-178
  • Received Date : 2025-09-08
  • Revised Date : 2025-09-23
  • Accepted Date : 2025-10-30
  • DOI :https://doi.org/10.21218/CPR.2025.13.4.171
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