What is the basic technology for Solar Powered Lawn Light?
Currently, the technology of Solar Powered Lawn Light has got mature, it has been more and more popular in market and traditional LED lawn light has been replaced by it. As one kinds of electric products, some basic technology is required to realize its function, for example, Solar Powered Lawn Light need be controlled by light-control automatically, at the same time, to realize energy-saving is also important for solar LED light, therefore, some basic technology need be learnt when to design it, now let us introduce as below.
1. Light-Sensor.
Solar Powered Lawn Light need be controlled by light-control switch, usually, designer would adopt photoconductive resistance to realize turning on and off automatically, in fact, solar panel, itself is a superb light-sensor, to use solar panel as light-sensor switch would have better performance than photoconductive resistance. In terms of a Solar Powered Lawn Light which is 12V lithium battery built-in, solar panel comprises of 4pcs solar cells to series connect, its voltage is low, and voltage would be lower when it is in low light situation, so that the voltage already is less 0.7V but it is not yet dark, to cause the light-control switch out of work. At this situation, just need add a transistor to link and enlarge, the problem would be solved.
2. The loads value can be controlled by the voltage of battery.
Usually, Solar Powered Lawn Light has a high requirement to sustain working for continuously rainy or cloudy days, which would increase the system cost. We can reduce the connection quantities of LED chips when the battery voltage decreases in continuously rainy or cloudy days, or reduce its lighting time, which would reduce the system cost.
3. The encapsulant-types of solar cells.
There are two kinds of encapsulant for solar cells, that is lamination and epoxy plate. The lamination technique can guarantee solar cells work above 25 years, although the epoxy plate is beautiful, its lifespan is just 2~3 years. Therefore, for the Solar Powered Lawn Light which is below 1W and don’t have high requirement for lifespan, the epoxy plate is suggested to use. Regards to the Solar Powered Lawn Light which has a high requirement for usage lifespan, the lamination type is suggested to use.
4. Twinkle and lighting color change.
Gradual brightness and darkening are good solution for energy-saving, on the one hand, it can increase the light-effect of Solar Powered Lawn Light, on the other hand it can control lithium battery to even output current by changing twinkle duty cycle, to prolong system work time, or under the same condition, to reduce the power of solar cells, then the cost would get greatly decreased.
Above is the introduction for the basic technology of Solar Powered Lawn Light. Now the technology of solar panel is being researched, with the technological development, the efficiency of solar panel has got increase and cost is reduced, which is better for the development of Solar Powered Lawn Light. Solar powered LED light is more utilized, traditional fossil fuel is less exploitation, which is good for environment and the sustainable development of ecologist system.
Bingsolar, 21th, October, 2018
