Fundamentals of Solar PV Bolted Joint Loosening and Prevention
| Date Published |
01/2026
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| Publication Type | Report
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| Abstract |
This report explores the causes of bolted joint loosening in solar PV mounting systems and outlines practical design and installation strategies to improve reliability. It distinguishes between relaxation and self-loosening mechanisms, examines factors such as embedment, thermal effects, joint slip, and friction, and presents guidance on joint design, pretension control, and locking methods to reduce preload loss in utility-scale PV structures. |
| Year of Publication |
2026
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