Photovoltaic inverters, combiner boxes, electrical cabinets, and other electrical equipment serve as the core units for power conversion and system control in photovoltaic power stations and are required to operate continuously throughout the entire life cycle of the system. During long-term operation, such equipment is subject not only to continuous vibration but also to frequent thermal cycles and load variations.
Therefore, the fasteners used to fix inverters and electrical equipment—especially screws—are required to meet higher standards in terms of structural stability, anti-loosening performance, and long-term reliability.
Structural Fixation Requirements for Inverters and Electrical Equipment
Inverters and electrical equipment typically consist of circuit boards, power modules, heat sinks, cable terminals, and internal structural components, all of which rely on screws for fixation and connection. Unlike relatively static mechanical structures, electrical equipment is simultaneously affected by mechanical vibration and thermal expansion and contraction during operation.
The long-term stability of the system depends not only on equipment design but also on the reliability of fastening connections. As the most widely used basic connectors in electrical systems, screw performance directly affects operational safety and system continuity.
Whether used for circuit board fixation, power module installation, heat dissipation component mounting, or outdoor electrical cabinet sealing, the reliability of screws has a profound impact on vibration resistance, thermal stability, and overall service life. Loosening, deformation, or loss of preload caused by thermal fatigue may lead to poor electrical contact, abnormal vibration, localized overheating, or even system shutdown.
Recommended Screw Types for Inverters and Electrical Equipment
Locking Screws
Locking screws include pre-coated locking screws and screws assembled with spring washers or combination gaskets. These fasteners maintain stable preload under continuous vibration and effectively prevent loosening caused by dynamic loads.They are widely used in inverter housings, electrical terminals, and internal structural connection points.
Combination Screws
Combination screws are pre-assembled fasteners integrating screws with washers (such as flat washers or spring washers), eliminating the need for separate washer installation during assembly.This design ensures consistent fastening force, improves assembly efficiency, and reduces missing or incorrect assembly, making them ideal for batch production and automated assembly of inverters, electrical cabinets, control modules, and circuit boards.
Precision Screws
Precision screws ensure accurate positioning and uniform stress distribution during assembly, preventing damage to sensitive components caused by excessive tolerance deviation.They are widely applied in inverter circuit boards, control modules, sensor assemblies, and other precision electronic structures.
Throughout the entire life cycle of a photovoltaic system, the fastening quality of inverters and electrical equipment directly affects power generation efficiency, system safety, and long-term operation and maintenance costs. Selecting a reliable fastener supplier is a critical step in ensuring electrical system quality and reducing long-term operational risks.
YH FASTENER has long focused on the photovoltaic field, specializing in anti-loosening structures, high-temperature resistance, and long-term stability. Through cold heading, CNC precision machining, and automated inspection, we ensure stable and consistent performance for every batch of fasteners, meeting diverse application requirements from inverters to electrical cabinets.Contact Yuhuang today to discover how our high-performance fasteners can elevate your new energy initiatives and contribute to a sustainable energy future.
Post time: Dec-13-2025
