If you want to ask what is the largest and densest infrastructure in a city, the answer must be street lamps. It is for this reason that street lamps have become a natural carrier of sensors and a source of networked information collection in the construction of future smart cities. In a sense, a smart solar street lamp that has undergone intelligent upgrading is an important entrance to a smart city.
Smart solar street lights make cities more energy efficient
Lighting has always been a “big user” in the city, accounting for almost 1/4 of the total electricity consumption. The energy consumption of street lamps can be described as “contributing” (National Bureau of Statistics data shows that China’s power generation in 2015 was 5.618 Trillion kilowatt-hours, road lighting electricity consumption accounts for 9%, about 505.6 billion kilowatt-hours). How to achieve energy saving and environmental protection under the premise of ensuring lighting needs is a problem that any enterprise that provides city-level lighting equipment and solutions is very concerned about.
In the past few years, the more common measure for enterprises is to replace traditional sodium lamps with more energy-saving LED lamps, and has achieved remarkable results. However, with the continuous expansion of the city scale, the number of street lights continues to increase. In addition to replacing the lamps themselves, can this problem be better solved from the system level? Therefore, the intelligent lighting control system came into being, which can further achieve secondary energy saving on the basis of LED lamps.
It turned out that the traditional street lighting system mainly relies on manpower to adjust the lights, and the intelligent lighting system can realize remote single or multiple light switch, dimming, remote control based on environmental sensing data or terminal equipment control center software. Control of monitoring etc. In other words, the intelligent lighting control system in a smart city can dim and control street lights according to time period, weather, or other needs, thereby avoiding unnecessary waste of energy.
Smart solar street lights make maintenance more convenient
The existence of street lights guarantees the vision of pedestrians and vehicles in dark environments and when driving at night, so once a failure occurs, it must be promptly maintained.
Now, as long as the operation and maintenance personnel sit in front of the display screen of the management center or hold a mobile device, they can always know where the street lights need to be maintained, and they will no longer be inefficient and blind.
Smart street lights, not just street lights
The intelligent solar street lamp system not only completes the function of lighting, but also realizes remote centralized control and management of street lamps (with automatic setting of brightness according to traffic flow, time, weather conditions and other conditions, remote lighting control, active fault alarm, remote meter reading Etc.), it also provides a natural basic network as an important bearer of the smart city sensor network, connecting various smart sensors to form the urban Internet of Things.
The combination of street lighting equipment and Internet of Things, wireless communication technology and other technological methods are used to enhance the ability to respond to urban public management, safety and emergencies, which will bring more possibilities to the construction of smart cities.
Smart solar street lights is working stand-alone, no need join to grid power
The smart solar street light management system is a wireless system boasting simple installation and convenient maintenance, aimed at solving problems of the conventional solar street light management systems, such as inconvenience, high maintenance cost, etc. The system for solar street lights consists of a solar street light system management center, intelligent terminal, GPRS base station, remote concentrators, wireless remote-control street light controllers and wireless terminal modules.
The solar street light system management center connects to the intelligent terminal and GPRS base station respectively via wireless network, and the GPRS base station connects to multiple remote concentrators via the GPRS network, then the remote concentrators connect to multiple wireless remote-control street light controllers through multiple wireless terminal modules.
The smart wireless control system for solar street lights employs Internet-of-things and wireless communication technologies, not only providing different control options including manual control, time control and light control, but also able to perform dimming, charging and discharging control. Besides, the system can carry out real-time data detection and operation status monitoring and manage the street lights in a centralized manner through the solar street light system management center and wireless modules, thereby realizing remote lighting monitoring, real-time control, intelligent management and energy saving.
We will introduce a kind of solar street light with grid power complementary. Its main function is to switch to grid power when solar power is insufficient. In this way, when experiencing a long rainy season, or in areas with insufficient light at high latitudes, solar street lights can function well without the lights shutdown.
The difference between grid complementary solar street lights and traditional solar street lights is that grid complementary solar street lights need to connect a set of mains cables to the grid, and need a transformer to convert grid AC electricity to suitable DC electricity.
The technology used by the grid power complementary solar street lights is not a traditional grid-tied technology. It does not upload solar power to the grid. Its grid connection means that when it encounters a long rainy day and the solar power supply is insufficient, it switches to the grid power supply.
The main advantages of grid complementary solar street lights are:
- The light source can be used for very larger power.
- Less affected by the weather and environment.
- Low requirements for batteries and battery box.
- Cables need to be laid, which is troublesome to install.
- Need to configure additional power driver and constant current source.
Grid power complementary solar led street lights, or we may also called it on-grid solar led street lights can solve the problem of insufficient solar light in high latitude areas and the long rainy season in certain areas. Compared with the ordinary solar street lamp, it solves the problem of light-off caused by rainy days and insufficient light. Both systems have their own advantages and disadvantages.
With the increasingly prominent global environmental problems, the world attaches more importance to clean energy. It not only encourages the development of photovoltaic and wind power industries, but also introduces a series of subsidy policies for photovoltaic power generation. The solar LED street light market has a bright future, and a large number of entrepreneurs immediately swarm in. As the tide of clean energy surges, the role of solar street light is emerging. The first is the application of LED, which is also an energy-saving and environment-friendly product. When LED is applied to outdoor lighting on a large scale, the performance of solar powered street lights is greatly improved, followed by the improvement of conversion efficiency of solar panels and the “abatement” of lead-acid batteries. These changes make solar led street light become green products in a real sense. From the beginning, they cost no electricity and are easy to install to energy saving and environmental protection, solar street light have completed a significant transformation.
The more mature the technology, the cheaper price it will be. Most engineering projects will also give priority to solar led street light, because they consume a lot of electricity. Although solar led street light require a certain amount of capital investment in the early stage, in the long run, the rate of return is very considerable due to its non-consumption of electricity. Such a rate of return is not only reflected in the economy, but also reflected in the environment.
THE MAIN ADVANTAGES OF SOLAR LED STREET LIGHT
- Energy Saving – Solar led street light uses the natural light source in nature to reduce the consumption of electric energy.
- Security – There may be safety hazards caused by construction quality, material aging, abnormal power supply and other reasons. But the solar street lamp does not use alternating current, uses the battery to absorb the solar energy, converts the low voltage direct current to the light energy, does not have the safety hidden trouble.
- Environmental Protection – The solar street light is pollution-free and radiation-free, which conforms to the modern concept of green environmental protection.
- High Content of Science and Technology – The solar led street light is controlled by intelligent controller, which can automatically adjust the brightness of the lamp according to the natural brightness of the sky in 1d and the brightness required by people in various environments.
- Durable – At present, most of the production technology of solar cell modules is sufficient to ensure the performance does not decline for more than 10 years. Solar cell modules can generate electricity for 25 years or longer.
- Low Maintenance Costs – In remote areas away from towns, the cost of maintaining or repairing conventional power generation, transmission, streetlights, and so on is high. Solar led street light only needs periodic inspection and little maintenance workload, and solar street light price of maintenance is less than conventional power generation system.
- Modular installation components – The installation is flexible and convenient, so that users can choose and adjust the capacity of solar powered street lights according to their own needs.
- Independent Supply of Electricity – Off-grid operation of the solar led street light with power supply autonomy, flexibility.
MAJOR DISADVANTAGES OF SOLAR LED STREET LIGHT
- High Cost – Large initial investment of solar street light, the total cost of a solar led street light is 2 to 4 times of the same power of conventional led street light, that makes the solar street light price much higher than led street light.
- Low Energy Conversion Efficiency – solar photovoltaic cell conversion efficiency of about 15% ~ 19%, theoretically silicon solar cell conversion efficiency up to 25%, but after the actual installation, may be due to the surrounding buildings block the efficiency. At present, the area of solar cell is 110W/m2, and the area of 1kW solar cell is about 9m2. Such a large area is almost impossible to be fixed on the light pole, so it is still not applicable to the expressway and main road.
- Affected by the Geographical and Climatic Conditions – due to the sun to provide energy, the local geographical and climatic weather conditions directly affect the use of street lamps. Overcast and rainy day is too long can affect bright light, bring about illuminance or brightness to reach the requirement of national standard, appear even do not shine a light. For example, solar street lights in most parts of Russia are too short at night due to insufficient daylight.
- The Service Life of Components and Low Cost Performance – The price of energy storage battery and controller is relatively high, and the energy storage battery is not durable enough, which must be replaced regularly. The service life of the controller is generally only 3 years.
- Low Reliability – Due to the influence of external factors such as climate, the reliability is reduced. For example, 80% of the solar street lamps on Shenzhen binhai avenue cannot rely on the sunlight alone. Similar to yingbin road in dazu county, Chongqing, the street lamps are powered by dual power sources.
- Difficult Management and Maintenance – The maintenance of solar street lamps is difficult, the quality of heat island effect of solar panels cannot be controlled and detected, and their life cycle cannot be guaranteed, and they cannot be uniformly controlled and managed. Different lighting conditions may occur.
- Illumination Scope is Narrow – the solar energy street lamp that applies at present is inspected by Chinese municipal engineering association and measured on the spot, general illuminance scope is 6 ~ 7m, beyond 7m outside can dim not clear, cannot satisfy the need of fast road, main road.
- Solar Street Lighting has not Established Industry Standards – Environmental protection anti-theft problem, battery improper treatment may cause environmental problems.
- Theft is also a big problem – in addition.
HOW TO CHOOSE SOLAR LED STREET LIGHTS
When you are ordering solar led street lights, make sure you know what configuration you will need, what kind of road they will be used in, how often they will be used, what the local solar radiation situation will be, and what about the brightness and lifespan requirements? The configuration of solar street lights varies with wattage and price. A set of solar street lights equipped with a very good configuration will be very good to accept the sun’s rays, the brightness of the light is very high, the light is very soft, will not hurt the eyes, and the lighting time is relatively long, if there is rainy weather halfway, it can also be uninterrupted lighting.
Therefore, it is suggested that the purchase price is high but reasonable and the solar street light is better equipped. Of course, good technology is also a very important factor supporting the price. The quality of a technology directly determines the use of solar street lights.
CHECK THE STRENGTH OF THE MANUFACTURER
The strength of the manufacturer is very important. Why? Because if a manufacturer has a strong strength, the size of the factory must be large, suppliers are also many, they can have a number of choices, also can give the maximum benefit to customers. Not only that, the strength of the manufacturers, you can provide more advice and more professional services.
CHECK THE DETAILED CONFIGURATION OF THE SOLAR LED STREET LIGHT
If you want to choose a more cost-effective solar street light, you must see the detailed configuration of the street lamp. Too complex things can not, but the power of the lamps, the size of the panels, the capacity of the battery and so on will see. Because such the wind of fictitious mark capacity on the market is stronger and stronger, if do not know to distinguish, will suffer loss likely. In addition, do not know some street knowledge, the right to grasp the hand in the other side, they do not know the overall effect is how, this is the most suffocated.
CHECK THE WARRANTY TIME
Normally, the warranty time of solar street light is 1-3 years. The longer the warranty time is, the higher the quality of the product will be and the higher the price will be. If you choose the product with short warranty time for cheap, the cost of follow-up maintenance will be very high.
HOW TO INSTALL THE SOLAR LED STREET LIGHT
Select the direction of the light source according to the road direction and the position of the light source, pay attention to the latitude where the light is installed, and adjust the Angle of the solar panel. The tilt Angle takes the local latitude as the reference standard, so that the solar panel can meet the maximum exposure area of the road.
The solar street lamp must be installed on a sunny surface with no shading all day long. Solar panels face south in the northern hemisphere. The southern hemisphere, on the other hand, faces north.
Ambient temperature: -20℃~60℃. In the cold environment, should be appropriate to add system configuration, increase the temperature protection.
There should be no direct light source above the solar panel. So as not to make the lamp light sensor system misidentification resulting in mis-operation.
Installation of foundation embedded parts (demonstration drawing)
In the case of survey site, if the soil is hard, excavate a pit of about 1 cubic meter at the location of the installation of lamps (depending on the height of the light pole). In case of soft soil or special requirements, the excavation depth shall be determined separately.
3. INSTALLATION THE LAMP
HOW WILL SOLAR LED STREET LIGHT WORK FOR YOU?
To make sure solar led street will be right for you, contact a reliable solar street light supplier, and they will design and quote your project free of charge. So that you can choose whether it is best choice to use solar led street light. We are a manufacturer of solar street light, if you need any help please contact us immediately and we can quote accordingly for your project.
Solar Powered Billboard Lights Outdoor is suitable for outdoor billboard lighting, such as community public notice boards, urban road public service advertising light boxes, highway billboards, mountain billboards and so on.
All-in-one design, the composition of the components together: high-energy-saving solar LED floodlights, solar panels, controllers, batteries, hub cables and accessories, solar panels and lamp holders, cloud monitoring (optional).
Billboard Solar LED Lighting System details:
1. Patented lens technology commercial billboard solar LED floodlights advertising lamp (warranty for five years)
I: Low power and high energy saving, 28 times more energy-saving than traditional high-pressure sodium lamps
II. Advanced directional projection technology, efficient multi-angle light-emitting technology, to ensure the uniformity of picture illumination, lighting without dead corners without zebra pattern, within 200 meters of clear visibility;
III: Reasonable thermal design, extended LED life, life of up to 50,000 hours, seven or eight years maintenance-free;
IV: The original Lumileds LED chip, the quality is stable and reliable;
V: Efficient constant current drive technology to improve the overall energy efficiency of the system;
VI: the use of safety voltage 12V power supply, to eliminate the risk of electric shock;
VII: good waterproof performance, protection class IP67, fully adapted to the hot sun and rain weather and other environment outdoor billboard use;
2. Efficient solar panels (10 years warranty):
Products of listed companies with a life span of up to 25 years;
3. Full-intelligence solar controller (five-year warranty):
Advanced MPPT technology, lock the maximum power point, automatic light control setting, and has anti-overcharge function (when the battery energy reaches a certain value to stop charging and discharge, effectively protect the battery, extend battery life)
4. Energy storage battery (three years warranty):
Power adjustable, ultra-long standby, lamp can be based on the amount of battery power to adjust the power output size, to ensure that rainy days 3-7 days normal lights.
5. Cloud monitoring system (optional):
With it no longer need manual patrol, no longer worry about the layout is replaced do not know, also no longer worry about billboard lights are not bright or broken do not know, anytime, anywhere to understand the billboard situation, the use of mobile platform to achieve long-distance real-time surveillance, video recording, picture transmission and other modern advertising management functions.
Let your billboard business increase the method of light energy solar LED advertising lighting system is an innovative high-tech products, it can simplify the installation and approval procedures, to solve the traditional lamp brightness is not enough, uneven brightness, prevent cable, cable construction problems, and never use electricity, while solving the user and the company’s troubles, high customer satisfaction, The order is coming naturally!
1. Why we use solar LED lamps?
Solar LED lamps are widely used in life today, with the advantages of no wiring, no electricity, it is suitable for areas which far from the city, and areas which without electricity, such as rural areas, islands and so on.
Solar LED lamps in the city is not so much application, the main reason is because the city has sufficient power supply, high-rise blocks the sun, and the cost of relatively ordinary LED lamps higher and other factors. However, we can still see the solar lamps used in the park of the downtown.
2. What are the main kinds of solar LED lamps, and where are they used?
At present, most of the application of solar lamps is outdoor, such as solar street lamps, solar flood lamps and so on. Among them, the most widely used are solar street lights. For example in most of African countries, they generally choose solar street lights as it is really convenient, because these countries are lack of electricity. As well as island countries, it will also give preference to the use of solar street lights. But the solar flood lights are widely used in rural areas, providing excellent conveniences for garden lighting, square lighting, construction sites and so on, they are very flexible than solar street lights.
However, the most commonly known is the solar street lights, so I also will write some different between solar street lights and solar flood lights.
3. What is the difference between solar led flood lights and solar street lights?
Almost all solar lamps work in similar principle, the main components are solar panels, batteries, controllers and LED modules. The solar panels absorb solar energy during the day, and then store the energy into the battery, at night the battery discharge to lit up the LED module.
Solar led flood lights and solar led street lights can be used as same under some certain conditions, but the actual applicating area is different. Solar street lamps are mainly used in road lighting, such as community roads, park roads, pedestrian streets, rural roads and so on. The application of solar flood lights is more complex, mainly for community squares, open-air sports venues, construction sites, building facades, billboards and so on. Solar flood light do not need to rely on the lamp pole, can be installed on the wall, roof or any other place. Its installation way is more flexible, so its application is more inclined to civilian. But for solar street light, they are mainly installed on lamp posts for road lighting, so they prefer engineering projects.
4. How many kinds of solar floods and what are the characteristics of each kind?
There are split solar powered flood lights and All-in-one solar flood lights. At present, the current market commercial solar flood lights are mainly split type – a solar panel connected to an LED flood light, batteries and controllers normally built into the flood light. Its solar panels and LED flood lights are separate so that it needs to be wired when installed. This kind of solar flood light installation is a little complex and ugly outlook. And most of the split solar flood lights on the market are DIY forms, a little bit of solar knowledge can be self-assembled.
All-in-one solar led flood light put solar panels, controllers, LED modules, batteries integrated in a single product, easy to install, more commercial, each suitable for ordinary end-users. The users do not need to install solar panels separately and wire, the appearance is more simple and beautiful.
5. How to choose a solar flood light.
To choose an excellent solar led flood light, you must understand its construction, its main components are: solar panels, batteries, controllers, LED head and frame structure. Batteries account for the largest share of the cost, followed by solar panels, controllers and LED heads. At present, there are a lot of supplier over-state the power of the light on the market. For example, some nominal 100W, in fact only 20W. So how do we tell if a product is a false label? We can judge from its solar panel power, battery capacity, if the solar panel power and battery capacity is not enough to support led lamp work, then it is not scientific, we can determine that this product is a over-state.
If you would like to know exactly how to calculate the solar lighting system is scientific, please contact our professional sales for your answer.
In recent years, solar energy has developed rapidly and spread to all fields, thanks in large part to the decline in the cost of solar cells and energy storage. As an important part of solar energy products, the cost reduction of solar cells is promoting the rapid development of solar energy industry. In China, from the overall development trend of the solar street lighting industry, some institutions expect industry-wide production by 2020 is expected to be around 20.25 million.By 2020, the solar street lamp market capacity will reach 60 billion yuan.
With the development of new energy vehicles, lithium battery technology becomes more mature, cost decline, so that lithium battery in the use of solar street lamps become possible. Lithium batteries have more advantages over lead-acid or colloidal batteries. Because of the high energy density of lithium batteries, the volume of the same capacity becomes smaller. It makes the integration of batteries and lamps possible, and also providing more imagination space for the design. It makes also solar street lamps more aesthetic, and making transport installation and maintenance easier; The longer cycle life of lithium battery, also makes solar street lights longer lifespan, this is undoubtedly good news for photovoltaic lighting.
With the new energy vehicle battery life problem, there are many batteries were eliminated. In the environment that national policy and regulations are not standardized, and the secondary application technology are immature. Many manufacturers desire to be able to deal with these batteries on low-cost processing, or even sold by tons, that makes the price very low, some costs may be normal batteries 1/5-1/10. How long can these batteries last? The seller’s psychology has no bottom.
So these products themselves are not guaranteed, and because many of them are dealing on case, the transaction is not guaranteed after completion. Where did these eliminated batteries go? What is the use? It is understood that many of the batteries that have been eliminated are flowing into the solar street lighting industry, which has made the solar street lighting market worse, resulting in a more uneven product, the price and quality gap becomes greater. Not only that, some manufacturers even openly claim that the car’s battery life can be eliminated by 15 years, with a warranty of 5 years. I am also wondering: how dare these solar street light seller can promise their light can use more than 15 years?
Because this culture spreads faster in this industry, really beyond imagination. It seems that overnight, will let everyone feel that solar street lights should use such batteries, so in order to find out the normal battery and eliminate the battery in the end what difference, We specially combined with some battery suppliers to do industry survey, finally we get some data, and through data and analysis to let everyone understand the secret in the middle.
1). Analysis from a key technology perspective
What is the ladder utilization? For example, for example, the battery is used in new energy vehicles, the battery is fully charged 100% energy, after a period of time, the battery capacity will decay from the car decay ingress edifying the battery. The battery capacity from 80%-20% of the interval can be used ladder utilization, such as the application in low-speed cars, electric tricycles, Charging station energy storage and so on. In China, the government also promote this, but the use of ladders can not be applied casually, the core of the ladder utilization is the need for a number of complex testing and analysis of native products, scientific judgment of its life cycle value and reusability. So as to design the product in line with the gradient level and application areas. In addition, the use of ladders requires a rigorous inspection process, in the relevant legal provisions, the operating procedures of decommissioned lithium-powered batteries should have a strict inspection process and high safety requirements to carry out. However, the key technology used by the ladder is not mature enough, and some technical difficulties have not been solved.
The key technologies used in the rungs are two: one is discrete integration technology, different battery pack technology, disassembling needs to be integrated according to the performance, life of different unit batteries, and the other is the whole life cycle traceability technology: soC, SOH, SOP technical indicators provided by BMS to estimate.
In order to maximize the value of the use of ladders need to be strictly in accordance with the standard process control, but in practical application, many manufacturers do not master the use of ladder technology, and because of the high cost of testing, many manufacturers have not gone through the process test, directly sell the obsolete batteries, without any quality assurance.
2). Analysis from a chemical point of view
The main chemical of the battery are composed of positive negative diaphragm electrolytes, etc. , and these materials themselves have a life cycle. In the case of lithium phosphate, the cycle life can be up to 2000 times, so as the number of cycles increases, the chemicals in it change, making the entire life cycle may be uncertain. Take Shenzhen’s pure electric taxi as an example, I once talked with the driver, their electric taxi to charge twice a day, and this is a large current charge and discharge, a day by 2 cycles, 3 years of the number of cycles for 2 x 365 x 3 x 2190 times. The lithium phosphate core has 2,000 cycles, while more string-link-ups on electric vehicles do not reach that many cycles. If the electric car after 3 years of operation eliminated the battery, the cycle life has been more than 2000 times, and from its own chemical characteristics, the life can be used can no longer be guaranteed, which is why no battery manufacturer dares to such a battery to warrant the reason.
Ladder battery secret sale scene secretly caught on camera
3). Analysis from the point of view of actual test
In order to let users understand the internal structure of the obsolete battery more intuitively, there are institutions to the elimination of the battery cells sampling test: a total of 250pcs, of which 80pcs due to rust or other reasons, can not measure the voltage.
Comparison of normal batteries (left) and rungs (right)
Through testing, we also found that the core of the internal resistance and voltage are very different, so that the consistency between the batteries will be much worse. Such a product will be strung in parallel after there will be a greater hidden danger.
Therefore, the elimination of the capacity of the core, pressure drop, internal resistance, circulation and other performance in a very low and unstable state, not only can not meet the assembly requirements, and even for single use, its capacity attenuation and power loss rate is also extremely unstable, the user experience must be extremely poor. And lack of liquid, lithium such internal defects, represents an unstable security risk.
4). Analysis from the perspective of the working environment
Many manufacturers will be removed from the car battery on the solar street lamp, is this feasible? Solar street lamp application scenario is actually as complex as the electric car, the working environment is worse, the use of the car is not so continuous, there is rest time, and the car generally parked in the underground parking lot, can avoid the sun, heavy rain and other bad weather. But solar street lights are 24-hour work, every day, no stop, and used outdoors, will encounter storms, snow, sun, wind and sand and other extreme weather. Therefore, it is not appropriate to use the batteries that have been eliminated from the car on solar street lamps with more complex working environments.
5). Analysis from the properties of solar street lamp engineering
Solar street lamps are often as a city infrastructure equipment, service is the citizens, related to the people’s real life, so the reliability of products, safety, stability requirements are higher. If the eliminated battery used in the service of the public on the solar street lamp, there is a great safety risk. The eliminated battery itself has a greater hidden danger, because the eliminated battery itself has been a long time charge and discharge cycle, life and chemical characteristics have not been guaranteed, just like a person who has done heart bypass surgery, but also let him run a long-distance pull pine. He may not have problems, but the risks are extremely high. But solar street lamps as an infrastructure project product, this risk is unacceptable, this is related to the lives and safety of the masses.
But many manufacturers in order to earn quick money, regardless of hidden dangers, will be eliminated batteries on the solar street lights, will not consider the late quality assurance problems, and even some manufacturers will be the warranty time void, but when the real problems to find manufacturers, but no sound.
So, in my opinion: If you have requirements for the life and quality of solar street lights, please do not choose from the car to be eliminated from the battery used on solar street lights. If you don’t ask for the quality, I’m not opinion guide, the specific choice is your own.
But I still suggest that no matter manufacturers, engineers, or even government departments, should choose high-quality products and services to the public, responsible for products, users responsible for social responsibility.