Blogs

This abstract summarizes that with the rapid development and grid integration of photovoltaic power generation, the islanding effect has become a key hidden danger. It briefly introduces the definition and generation mechanism of the islanding effect, analyzes its multi-dimensional hazards, and points out the importance of its prevention and control as well as the relevant standard system and future technical development direction, providing reference for the safety management and technical optimization of grid-connected photovoltaic systems. Read More

Solar cell modules are the core energy conversion units of photovoltaic (PV) systems, and their quality directly determines the efficiency, stability, and service life of PV systems. To ensure module quality and avoid potential hazards, the industry has established strict testing standards. This article systematically analyzes the core testing requirements of solar cell modules from five aspects: appearance cleanliness and cell integrity, cell chipping and corner defect control, grid line and bus bar connection reliability, assembly clearance and displacement precision, and solder ribbon and grid line connection sealing. It also elaborates on the industrial significance and application value of these requirements, providing technical reference for module production, quality inspection, and application, and promoting the standardized and high-quality development of the PV module industry. Read More

The abstract summarizes that rational battery capacity design is critical for the reliability, stability and economy of DC power supply systems (e.g., photovoltaic, emergency backup, industrial energy storage). It outlines the paper’s content: defining battery capacity, analyzing key influencing factors, detailing design steps (parameter determination, formula derivation, series-parallel adjustment), verifying through photovoltaic system engineering examples, and putting forward design notes and optimization suggestions to provide reference for designers, with a mention of future optimization adapting to new battery technologies. Read More

This article corrects the misconception in PV operation and maintenance that junction box overheating equals false soldering. Actual overheating mostly stems from increased contact resistance, faulty bypass diodes or cable issues, aggravated by high current. Heating patterns vary with string current and component quality, while infrared detection performance depends on distance and resolution. A simplified on-site troubleshooting method is also provided. Read More

This paper focuses on the overall structural design and mainstream installation methods of photovoltaic supports. It points out that the selection of support installation methods should integrate factors such as roof type, load-bearing capacity, regional climate and project scale, and comprehensively analyzes four mainstream installation methods (on-site pouring of cement piers on concrete roofs, precast cement brick counterweight, steel structure connection, special installation for color steel tile roofs) in terms of their structural characteristics, advantages, disadvantages and applicable scenarios. Finally, it puts forward selection suggestions and concludes that rational selection and standardized construction of installation methods are crucial to the stable operation and investment benefits of photovoltaic power stations. Read More

In hardware system design, brackets are core load-bearing components, and their material selection directly affects the system’s stability, service life, safety, and overall cost. This article first clarifies the core principles for selecting bracket materials, then conducts in-depth analysis and selection evaluation on four commonly used materials (cast iron, angle iron, galvanized angle steel, and aluminum alloy), elaborates on their characteristics, advantages, disadvantages, and applicable scenarios, and further puts forward the practical process and precautions for material selection. The research shows that cast iron and angle iron are not suitable for long-term use due to performance defects, while galvanized angle steel is preferred for medium-heavy load and outdoor scenarios, and aluminum alloy is ideal for light-load and high-requirement scenarios. This article provides technical reference for engineering designers to select bracket materials scientifically and reasonably. Read More