The choice of the practical application of solar street lamps and fittings

As the traditional energy increasingly scarce, the application of solar energy will be more and more widely, especially in solar power field within the short several years has developed into a mature sunrise industry. 1: the price is one of the important link of the application of solar power,

along with the increasing shortage of traditional energy sources, the application of solar energy will be more and more widely, especially in solar power field within the short several years has developed into a mature sunrise industry.

1: the price is one of the important link of the application of solar power, with a single pair of fire solar street light, for example, two road load sharing is 60 watt, In the Beijing area light 3 effectively. 5-4. 5 h/day, discharge eight hours every night, calculate the panels to 20% increase in reserve) The panels will need to about 200 w, 10 yuan per watt calculation, the cost of the panels will be 2000 yuan, plus 200 ah battery cost was close to 1800, the whole street lamp one-time investment cost is much higher than the utility street lamp, caused a major bottleneck in the field of solar street light applications.

2: the service life of the battery should also be considered in the whole street lamp system application, usually the battery warranty of three years or five years,, but usually the battery in a year, even after six months will be in charge of discontent, some actual charge rate may fall to about 40%, it will affect the normal continuous rainy period of night lighting, so choose a good battery is especially important.

3: because the life of the LED is longer, and can work through period of time the lower power at night, general engineering manufacturers can choose the LED street light for solar street lighting, but the quality of the LED street light layer difference, serious LED light failure could light attenuation 50% half a year. So be sure to choose slower droop of LED street light, LED street lamp to heat and constant current main problem, constant current can pass plus a constant current driver or use a constant current controller, will rely on aluminum to heat radiator, suggestion is under the aluminum plate increase copper or brass to more effective heat dissipation, good control of temperature, LED the life will be longer.

4: the choice of the controller is often overlooked by engineering contractor of a problem, the quality of the controller layer is poor not neat, 12 v / 10 a controller market prices in 80 - 200 yuan, although is the part of the whole street lamp less value in the system, but it is a very important link. Controller is good or bad will directly affect the solar street light system component life, and the purchasing cost of the whole system.

a: should choose low power consumption controller, the controller working 24 hours a day, as their power consumption is bigger, will be part of the electricity consumption, advised to choose a power consumption under 5 milliampere controller.

2: choose a controller of high charging efficiency and charging with MCT mode controller can automatically track panels, large current, especially in winter or insufficient lighting, MCT charging mode efficiency is about 20% higher than the other.

3: should choose to have to adjust the controller of power, adjust the power controller has been widely promotion, can be in night pedestrians less time working current of automatic cut LED lights, save electricity, but also save the allocation of panels. In addition to select the saving function, but also should pay attention to the protection function of controller for battery and other components, as has a trickle charge mode controller can very good protection batteries, increase the service life of battery, the other set controller under-voltage protection value, as far as possible the under-voltage protection value in 11 or higher. 1 v, prevent battery discharge, battery overcharge, discharge can reduce the service life.

5: far away from downtown should also pay attention to the security work, many engineering contractor for construction of negligence, not effectively guard against theft, lead to battery, panels and other components are stolen, not only affects the normal lighting, also creates unnecessary damage to property. Now mostly in the engineering case stolen for the battery with panels, battery buried in concrete pouring is an effective security measures, and can have the effect of constant temperature. On the light pole mounted battery box proposed to weld reinforcement, additional battery if far from controller, must add temperature sensing line, otherwise the controller cannot detect the temperature of the battery, can't give relevant temperature compensation. Panels were stolen is mainly due to the low light pole or light pole clings around, so the height of the light pole design in more than 5 m.

6: waterproof of the controller, controller are installed in the chimney, battery box, generally do not water, but in some practical engineering cases because of improper installation or some controller circuit board didn't do anti-corrosion paint processing, because the rain down the controller terminals outside into the controller wiring short circuit. So when construction should pay attention to the controller inside the terminal connection wire bent into a 'U' type and fixed type, exposed to the outside of the cable is fixed as the 'U' type, so the rain will not be able to pour into the controller caused by short circuit, it also can be applied waterproof glue to waterproof, perimeter joints.