Solar Led Lighting System Development Obstacles

Solar LED lighting system need to improve and perfect

, to some extent affected the full play and the use of the system's functionality. In the following points.

2.1 Solar power generation efficiency

Low impact solar the LED efficiency solar led lights system LED driver power mainly provided by the solar modules, solar battery power generation efficiency is generally relatively low, the highest of all types in conversion efficiency monocrystalline silicon solar cells, photoelectric conversion efficiency about 15%, the highest, although up to 24%, but its production costs are too great. Similar polycrystalline silicon solar cells and monocrystalline silicon solar cell production process and lower costs, but its photoelectric conversion efficiency of only 12%. Amorphous silicon solar cell power generation in low-light conditions, but the conversion rate is only about 10%, and the conversion rate will decay with time. In summary, the low conversion efficiency of solar modules become one of the main reasons that seriously affect the efficiency of solar LED lighting systems. 2.2 LED luminous efficiency constraints luminescent properties of solar LED lighting systems.

LED as a light source of solar LED lighting system, the light-emitting properties of a direct impact on the luminescence properties of the entire system. LED luminous efficiency is determined by the internal quantum efficiency, external quantum efficiency. In this LED exist within a large number of non-radiative defects generated by the spontaneous polarization and piezoelectric effect to cause the light emitting efficiency decreases, i.e. Droop phenomenon. In addition, the LED is unable to shed heat caused the junction temperature rise is also the main reason for the decline of the light-emitting efficiency e27 led. Improve LED performance, improve the luminous efficiency to become one of the key issues of solar LED lighting systems, restricting the development of solar LED lighting systems.

2.3 high cost is a major obstacle to popularize solar LED lighting system

Since the silicon material prices and supply bottlenecks, solar LED lighting system electricity costs are high. According to statistics, hair kilowatt solar modules cost five yuan, 10 times the cost of traditional thermal power. Solar LED lighting system is the high cost of another reason is the cost of the LED light source in the system is also very high, in order to produce a luminous flux of 1000 lumens, for example, with an incandescent lamp costs less than $ 1, use compact fluorescent lamps cost less than $ 2 more than 20 U.S. dollars, while the cost of ten high-power LED, without the cost of the cable and and later electricity savings is difficult to offset the price difference of the light source. In summary, due to the high cost of solar power generation and LED light source led to the high price of solar LED lighting system, become a major obstacle to affect its widely used.

2.4 battery is the weakest link in the solar LED lighting systems, affecting the life of the lighting system

Solar LED lighting systems often use monocrystalline silicon solar battery life of up to 25 years, the life of the LED light source lamp is theoretically up to 100,000 hours, while the average battery life is generally 2 to 3 years, energy storage The capacitor life up to 10 years, can solve this problem to some extent, but the energy storage capacitor is very expensive prices. Batteries become key issues need to be resolved in the application of solar LED lighting system.

by: orange en

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