Nomenclature of powerful solar panels. Solar panels from Sharp. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Alternative energy sources
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Sharp's high-efficiency monocrystalline silicon solar panels, manufactured from monocrystalline silicon, consist of 72 cells (NT series) or 48 cells (NU series). Operating temperature range from -40°C to +90°C.
In table. 1.6 shows some of the characteristics of the popular high-power solar cells of the NT and NU series.
Table 1.6. Some characteristics of popular high-power NT and NU series solar arrays
Key Features of Sharp Solar Panels
In table. 1.7 shows the main characteristics of Sharp solar panels.
Table 1.7. Key Features of Sharp Solar Panels
Notes: * modules manufactured in Europe and Japan are identical in design; ** at ambient temperature 20°C and wind speed 1m/s
Application area
The area of possible application of the considered solar modules is regions with insufficient energy supply, for example, areas for the production and transportation of hydrocarbon energy resources, unattended railway crossings. Extended operating temperature range (from -40°C to +90°C) allows the modules to be used as power stations for base towers
GSM in remote areas. Solar panels are also used to solve everyday problems, in particular, to organize energy supply to private housing in regions with a large number of sunny days a year.
Some interesting features of solar panels
The efficiency of a conventional silicon-based solar cell ranges from 10-18%. There are also gallium arsenide solar cells, the efficiency of which is 2 times higher; due to their very high cost, they are used to a limited extent, mainly in the space industry.
When the solar cell (module) is heated by solar radiation, the operating voltage decreases. The temperature coefficient for silicon is about -0,4% per 1°C (0,002 W/°C per element); the element can be heated up to 60-70°C.
To charge a 12-volt lead-acid battery, 36 cells are needed, which will allow you to have a voltage margin in comparison with the voltage of a full charge of the battery, and compensate for losses in the battery charge controller.
In the presence of an air gap between the protective glass and the element, the reflection and absorption losses of solar radiation reach 20-30% compared to 12% without an air gap.
Author: Kashkarov A.P.
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