The Composition Of Solar Street Lights
Solar energy Street lamp consists of the following components: solar panels, charge controllers, batteries, lighting, lamp and lamp housing. Output power AC 220V or 110V, also configure the inverter.
1, solar panels:
Solar Panel is the core of solar street lights, solar street lights in the most valuable part. Its role is to project the Sun's radiation into electricity, or sent to the stored in the battery. More common in many solar battery and practical silicon solar cell and polycrystalline silicon solar cells and amorphous silicon solar cells, three. In full sun the Sun well East and West, using polycrystalline silicon solar panel as well, because polysilicon solar cell manufacturing process is relatively simple, lower price than Crystal. More rainy days, the Sun relatively ample South, monocrystalline silicon solar cells as well, because the performance parameters of single crystal silicon solar cells is relatively stable. Amorphous silicon solar cells under low Sun condition in the outdoor is better, because amorphous silicon solar cell on solar illumination conditions required is relatively low.
2, solar controller
Solar lamp size, a good charge and discharge controller is essential. In order to prolong the battery life, its charge discharge must be limited to prevent battery overcharging and depth charge. Temperatures in place, qualified controller should have temperature compensation function. While solar controller should be a combination of street light control function, with light control and time control function, and with night automatic switching control load function, rainy days lamp working hours.
Solar power systems energy input is very unstable, so battery system needs to be configured in order to work. General lead acid battery, Ni-Cd battery, Ni-H battery. Battery capacity is generally chosen to be guided by the following principles: first of all in the premise of meeting the night lighting, try to store solar energy during the day, and also need to be able to meet the continuous rain days power night lighting needs. Battery capacity is too small not to be able to meet the needs of lighting at night, batteries, batteries are always in a State of loss on the one hand, affect the battery life, resulting in waste. Battery with solar cells, the load (lamp) to match. Can be used a simple method to determine the relationship between them. Solar power must be more than 4 times higher than the load power for the system to work. Solar cell voltage exceeds the working voltage of the battery CK, can guarantee the normal negative to battery. Battery capacity must be more than 6 times higher than the load daily consumption times.
Solar street lamps which light source is solar-powered lamps and an important indicator of whether the normal use, solar lighting using low voltage lamps, low pressure sodium lamps, electrodeless lamp, DLED source.
(1) low-voltage lamps: low power, high light efficiency, but the service life of 2000 hours, low voltage lamp black, generally suitable for solar lawn lamps, Solar Garden light.
(2) low pressure sodium lamps: low pressure sodium lights, high (up to 200Lm/w), but the inverter, low pressure sodium lamps prices, the entire system to make high, use less.
(3) LVD: low power, high light efficiency. The light in 220V (pure sine wave, frequency 50 Hz) normal mains conditions, life expectancy of 50,000 hours, solar lighting greatly reduced service life and the simple energy-saving lamps (because the solar lamp is a square wave inverters, solar power supply 220V, output frequency, and voltage can not be compared with the normal mains).
(4) LED:LED light source, long life, up to 1 million hours, low voltage without inverter, high light efficiency, made 50 LM/w, importing 80 LM/w. With the advancement of technology, LED the performance will further improve. I think LED solar Street lamp light source will be a trend.