Advantages:
Energy-saving: solar street light is the use of nature's natural light source, reducing the consumption of electrical energy; environmental protection, solar street lights are pollution-free, radiation-free, in line with the modern concept of green environmental protection; durable, the vast majority of the current production technology of solar modules are sufficient to ensure that the performance of more than 10 years does not decline, solar modules can generate electricity for 25 years or longer; low maintenance costs, is far from the towns and cities of Remote areas, in order to maintain or repair conventional power generation, transmission, street lighting, and other equipment is very expensive. Solar street lights require only periodic inspections and little maintenance work, and their maintenance costs are less than conventional power generation systems.
Safety: Utility lighting streetlights may have safety hazards due to various reasons such as construction quality, aging materials, and power supply malfunction. The solar street light does not use alternating current, the battery is used to absorb solar energy, the low-voltage DC into light energy, there are no security risks; high-tech content, solar street light using an intelligent controller for control, can be based on 1d the natural brightness of the sky and people in a variety of environments need to automatically adjust the brightness of the light; installation components building blocks, flexible and convenient installation, easy for users according to their The installation component block, flexible and convenient installation, easy for users to choose and adjust the capacity size of solar street lights according to their needs; ⑧ independent power supply, off-grid operation of solar street lights have the autonomy and flexibility of power supply.
Disadvantages:
High cost: solar street light initial investment is large, the total cost of a solar street light is 3.4 times the same power conventional street lights; energy conversion efficiency is low, the conversion efficiency of solar photovoltaic cells is about 15% to 19%, theoretically the conversion efficiency of silicon solar cells up to 25%, but after the actual installation, the efficiency may be reduced due to the surrounding buildings blocking. At present, the area of the solar cell is 110W/m2, the area of 1kW solar cell is about 9m2, such a large area is almost impossible to fix on the light pole, so for fast roads, main roads are still not applicable; greatly affected by geographic and climatic conditions, due to the reliance on the sun to provide energy, the local geographic climate weather conditions directly affect the use of street lights.
Not enough light demand: too long a rainy day will affect the light, resulting in illumination or brightness can not meet the requirements of national standards, or even no light, Chengdu Huanglongxi area of solar street lights are due to insufficient light during the day, resulting in the night light time is too short; components life and low-cost performance. Battery and controller prices are high, and the battery is not durable enough, must be replaced regularly, the life of the controller is generally only 3 years; low reliability. Due to the influence of external factors such as climate is too great, resulting in reduced reliability. Shenzhen Binhai Avenue on the solar street lights are 80% can not rely on sunlight alone, and Dazu County, Chongqing Yingbin Avenue, the same, are using a utility dual power supply mode; management and maintenance difficulties.
Maintenance difficulties: maintenance of solar street lights is difficult, the quality of the heat island effect of the panel cells can not control the detection, the life cycle is not guaranteed, and can not be unified control management. May not appear at the same time lighting situation; the light range is narrow, the current application of solar street lights by the Chinese Municipal Engineering Association and measured by the site, the general illumination range of 6 ~ 7m, beyond 7m outside will be dim, can not meet the needs of expressways, main roads; solar street lighting has not yet established industry standards; environmental protection anti-theft problem, improper battery handling may cause environmental problems. In addition, theft prevention is also a major problem.
