Technical Analysis of Distributed Photovoltaic Power Generation System

The distributed photovoltaic power generation system quotation provided by a professional distributed photovoltaic power generation system service provider generally includes: components, brackets, inverters, circuit breakers, DC boxes, AC boxes, fuses, DC cables, AC cables, Convergence terminal, grounding terminal, switch, labor, transportation, tax and other items, considering the size, design and construction difficulty of each project, the market purchase price fluctuates, and the quotation will also fluctuate accordingly;

In North China, the Yangtze River Delta, and the Pearl River Delta, where the application of distributed photovoltaic power generation is relatively dense, the difference in solar plane radiation is not as large as that in the western region, generally no more than 20%. If the optimal power generation inclination is set, the overall system efficiency is above 80%. Generally speaking, the average annual power generation of a 1KW project for 25 years should be around 900~1300kwh;

If it is an industrial and commercial factory roof with steel structure color steel tiles, generally only the south-facing side is covered with photovoltaic modules (the natural inclination angle of the standard factory roof is generally 5° to 10°), and the laying ratio is generally 1KW covering an area of 10㎡. That is, a 1MW (1MW=1000KW) project needs to use an area of 10,000 square meters;

If it is a brick-and-tiled roof of a household villa, generally the unsheltered roof area will be covered with photovoltaic modules from 08:00 to 16:00. Although the installation method is slightly different from that of the color steel tile roof, the area ratio is similar. , also 1KW covers an area of about 10㎡. In other words, a villa roof with a relatively large area (100-150㎡) can probably be installed with a photovoltaic power generation system of about 10KW, and the average annual power generation in 25 years is about 9,000-13,000 kwh (specific parameters need Hangyu Solar to issue professional project proposals) It will be determined after the book, only the general concept is given here);

If it is a flat concrete roof, in order to design the best fixed horizontal inclination, each row of modules needs to be spaced at a certain distance to ensure that they are not blocked by the shadow of the front row of modules, so the roof area occupied by the entire project will be larger than that of color steel that can be tiled. Tiles and villa roofs. Generally speaking, after considering complex factors such as natural shading and parapet height, the roof area occupied by 1KW is about 15-20㎡, that is, 1MW project needs to use an area of 15,000-20,000㎡. Based on this, you can estimate how much capacity you can install on your roof and roughly how much electricity you can generate.