all in one solar street light

How to Design the All In One Solar Street Lamp?

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All In One Solar Street Lamp Appearance Design

“A good aircraft must be a good-looking one,” said Dassault, a French aircraft designer. The same goes for all in one solar street lamps.

Taking the all in one solar street lamp as an example, the application of solar LED street lamp has attracted more and more customers’ attention and favor, but there are some problems in the structural design, lighting creativity, modeling design and other aspects, which has caused considerable confusion to the use and selection of customers. We discuss the five problems existing in the structure and appearance design of all in one solar street light and put forward the corresponding solutions. The main problems existing in the single old solar street lamps on the market are as follows

LUXMAN - all in one solar street led light

First, the surface treatment of materials is difficult to withstand the erosion of a harsh environment for a long time. All lamps are directly installed outdoors, which may encounter acid rain, sandstorm, Blizzard, insolation, and other harsh environments.

Due to the large proportion of aluminum alloy, although its corrosion resistance has been greatly improved after anodizing treatment, it is still impossible to ensure that the oxide film will not be damaged when the lamp is installed. When the oxide film is damaged, the active chemical properties of aluminum alloy can be shown. In some places with relatively large pollution, acid rain is easy to occur, and acid water will accumulate in some gaps on the lamp body. The evaporation of acid water in the gaps will corrode the lamp body after rain and sunny days. The corroded lamp body not only affects the appearance, heat dissipation, but also mechanical properties.

Second, the regular rectangular appearance design does not meet the requirements of wind resistance. The rectangular shape mentioned here refers to the rectangular shape of the lamps and lanterns, and each face presents a large area of a plane. Such a plane is easy to bear force when the wind blows vertically from a plane, its plane cannot differentiate the wind, thus causing pressure on the lamp pole and the fixed structure of lamps and lanterns. This pressure is not obvious in the general situation, but when the lamp pole after a long time of aging and corrosion, if in the coastal areas of a typhoon, there may be a tilt or bending lamp pole or the risk of falling lamps.

Lámpara solar todo en uno-uno.png

Thirdly, the failure rate of the LED street lamp caused by gluing treatment is high. Gluing treatment mainly refers to the need to apply a lot of industrial glue to make water-proof in the production process due to the congenital profile design reasons, which often leads to three problems: 1. Uneven gluing, resulting in water leakage;

2. Long-term use of lamps, resulting in aging of internal glue, resulting in weakening or complete loss of water-proof function ;

3. Too much gluing and untidy interior of the lamp body may cause poor heat dissipation and affect the lithium battery and LED lamp beads.

This will lead to water damage to the battery on rainy days or LED aging faster, higher failure rate.

 

Fourth, the overall design brings later maintenance difficulties. Integral design refers to the lamp the entire light source cavity is designed as an unmaintainable whole, or the light source module or the battery package is designed as an unmaintainable whole. The practice in recent years shows that it is impossible for LED lamps to be 100% maintenance-free. And this kind of integral type lamps and lanterns just cannot maintain, after general street lamp appears fault, cannot finish the maintenance task in the overhead car, want to change the whole lamp to return to manufacturer repair. This approach forces the manufacturer to become both a manufacturer and a service provider, at a great cost.

We discussed some solutions to these five problems. For the first and second problems, we believe that the lamps and lanterns need to be structural-type waterproof, reduce the amount of glue, and as far as possible to make a streamlined multi-angle lamp body, to have a reasonable design of heat dissipation holes and diversion surface. In this way, the product has three advantages: 1, the streamlined shape is conducive to direct most of the water to the ground, reducing the corrosion of acid and alkali substances on the lamps; 2, the streamlined surface can greatly reduce the accumulation of dust and snow above, conducive to heat dissipation and reduce the lamp pole and lamp pressure; 3, the multi-angle surface can differentiate the wind force into multiple directions, reducing the pressure of lamp poles and lamps.

For the third and fourth problems, we suggest that the overall design of lamps should be replaced by modular design.

For the fifth problem, it is suggested that the design of luminaires should be considered from the perspective of operators, and attention should be paid to details in the design.

In the aspect of design, compared with the traditional lighting, the integrated solar street lamp LED module has the characteristics of small size and flexible array mode, which can realize various and exquisite product design. In addition, lighting design engineers should develop industrial and artistic design products in combination with regional culture. All places have their own unique regional culture and customs. Only lamps designed according to local characteristics can be more popular with people, and also can let visitors know more about local characteristics.

In addition, lighting designers should not only be proficient in lighting common sense, but also constantly improve their comprehensive quality, go deep into life, know how to find and feel the beauty of life, and integrate emotion into the design of works, so as to realize the design of lamps with vitality and ideas.

With the increasing competition and internationalization of the Chinese market, many small and medium-sized enterprises lack the support of market networks and brands, so they should take the road of professional development and pay attention to product quality. The development of enterprises focuses on how to develop products with high quality, long life, and low price, so as to create a win-win situation for consumers, enterprises and the government.

Related article:

How to choose batteries for your solar street lamp project?

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integrated solar led light

How to Extend the Lifespan of Integrated Solar Street Light

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The service life of the integrated solar street light is mainly affected by four factors: solar panel, controller, lamp module and battery pack, and the most important is the service life of lithium battery. The life span of the solar street lamp directly affects the subsequent maintenance cost of customers.

The integrated solar panel is mainly divided into monocrystalline silicon, polycrystalline silicon, and amorphous silicon. The conversion efficiency of monocrystalline silicon solar panel is the highest, the photoelectric conversion efficiency is about 15%, and the highest is 24%. However, the charging effect on rainy days is not as good as polycrystalline silicon, and the production cost is high. As monocrystalline silicon or polycrystalline silicon is generally encapsulated by toughened glass and waterproof resin, it is durable and has a service life of 15 years, up to 25 years. The output power efficiency is 90% after 15 years and 85% after 25 years.

Different brands of LED Chips have a different service life. At present, integrated solar street lamps use LED lamps. The LED lamps have high luminous efficiency and service life of up to 50000 hours. Theoretically, 12 hours a day can be used for 11 years.

For the integrated solar street lamp controller, it is not only necessary to control, monitor and maintain the operation status of photovoltaic modules, lithium batteries and loads but also need to control the lithium batteries to ensure the operation status of lithium batteries.  At the same time, it directly maintains the load of the solar street lamps and provides a useful and relatively stable working environment, especially in critical conditions such as lithium battery power shortage or Undervoltage operation.

Reminder: a high precision, high stability controller plays a very critical role, can effectively extend battery life.

The lithium battery life of Luxman light factory’s series of integrated solar street lamps can reach about 6-8 years.

To sum up, the comprehensive service life of integrated solar street lamps is about 8 years, during which there is no maintenance, no electric charge, energy-saving, and environmental protection. Compared with the street lamps with traditional electric lighting, it can save a lot of costs and also contribute to the protection of the environment.

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integrated solar street light

What is Integrated Solar LED Street Light?

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Integrated solar LED street light, also known as solar LED integrated light, is a combination of high-efficiency solar panels, 6-8 years long-life lithium batteries, high-luminous-efficiency LEDs and intelligent controllers, PIR human sensor modules, anti-theft installation brackets. Also called all in one solar LED street light or integrated solar LED garden light.

integrated solar light

Working principle

The integrated solar street lamp is converted into electricity by solar panels and then recharges the lithium batteries in the integrated solar street lamp. During the day, even on cloudy days, the solar generator (solar panel) collects the energy needed for storage and automatically supplies LED lights at night, enabling night lighting.

At the same time, the integrated solar street lamp has PIR human body sensing function, which can realize the infrared sensing control lamp working mode of the intelligent human body at night. When there is a person, it will be 100% bright, and when there is no person, it will automatically change to 30% brightness after a certain time delay. saving more energy intelligently.  Solar energy, as a safe and environmentally friendly new energy with an inexhaustible supply, plays an important role in the integration of solar street lights.

Structure and composition

The main components of the integrated solar LED street lamp is as follows: it is composed of an integrated lamp (configuration: high-efficiency solar panel, high-capacity lithium battery, MPPT intelligent controller, high-brightness LED Chips, PIR human body sensor probe, anti-theft installation bracket) and a lamp pole.

integrated led solar street light

Structure and composition

The main components of the integrated solar LED street lamp is as follows: it is composed of an integrated lamp (configuration: high-efficiency solar panel, high-capacity lithium battery, MPPT intelligent controller, high-brightness LED Chips, PIR human body sensor probe, anti-theft installation bracket) and a lamp pole.

 

Functional features

The integrated solar LED street lamp adopts the integrated design, which is simple, fashionable, light and practical.

· Use solar power to save electricity and protect resources;

· Adopt the human body infrared induction control technology, the light will be on when people come, and the light will be dark when people go, so as to extend the lighting time;

· Adopt high-capacity long-life lithium battery to ensure the service life of the product, generally up to 6-8 years;

· No need for cable, extremely convenient installation;

· Waterproof structure, safe and reliable;

· Easy to expand other functions such as timing and APP control, USB interface, CCTV camera;

· Adopt a modular design concept to facilitate installation, maintenance, and repair;

· Alloy materials are used as the main structure, with good anti-rust and anti-corrosion functions;

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https://luxmanlight.com/what-are-all-in-one-solar-street-lights/

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led luminaire

Classification and Safety symbols of LED luminaires

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 According to the safety performance of the LED luminaires

The LED Luminaires are divided into four categories, namely:

LED luminaire Classification

Class 0 LED Luminaire

Rely on basic insulation for protection against electric shock-only rely on PVC for electrical wires for insulation. In the event of a basic insulation failure (a corruption of the wire: such as broken wires, aging), an electric shock or fire hazard may result. Protection against electric shock has to rely on the environment.

Class ⅠLED  Luminaire

The protection against electric shock not only depends on the basic insulation but also includes additional safety measures, that is, connecting accessible conductive parts to protective grounding conductors in fixed lines, so that accessible conductive parts will not be charged in the event of basic insulation failure. (Class 0 lamp + Ground wire)

Class Ⅱ Luminaire

(1) Definition of Class 2 lamps:

Protection against electric shock not only depends on basic insulation, but also has additional safety measures, such as double insulation or reinforced insulation, but there is no protection against grounding or installation conditions.

wind solar hybrid street light

(2) Features and standard requirements for Class 2 lamps:

  1. Such a luminaire may have one of the following forms:

a) A luminaire with a complete housing made of durable and sturdy insulating material that encloses all metal parts, except that small parts such as nameplates, screws and rivets are completely isolated from live parts with insulating material. Insulation is at least equivalent to reinforced insulation. Such a luminaire is called an insulated shell type I luminaire.

b) Lamps with sturdy all-metal enclosures are all double-insulated inside, except for those parts where double-insulation is obviously not feasible. Such luminaires are referred to as metal housing type II luminaires.

c) A luminaire having a combination of a) and b) above.

d)Insulated shell-type n lamps can form part or all of supplementary insulation or reinforced insulation.

e)The luminaire is still considered as a Class II luminaire if it is grounded to aid starting, rather than directly connected to accessible metal parts. The lamp cap housing and the light source’s starting band are not considered to be easily accessible metal parts, except those which are determined to be live parts by tests.

f)If a lamp with double insulation and/or reinforced insulation has a unified ground terminal or ground contact, the lamp has a Class I structure. However, if a fixed type II luminaire is used in a loop installation, it may have an internal terminal block. This terminal is used to maintain the electrical continuity of the ground conductor, and this ground conductor does not terminate in the luminaire. Internal terminal blocks are isolated from accessible metal through Class II insulation.

Class III Luminaire

The power supply used is a safety extra-low voltage, and no low voltage higher than SELV (36V) is generated inside the lamp: Convert the mains power to a low voltage of 36v (by adding a transformer).

Anti – shock level symbol description

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https://luxmanlight.com/how-to-choose-batteries-for-your-solar-street-light-project/

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solar street lamp controller

Solar Street Lamp Controller Design Principle

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Solar street lamp controller is the smallest part of the whole solar street lamp system

its cost is also one of the lower parts, but it is a very important part of the whole system, is the control center of the whole solar street lamp system. With the development of the industry, the function of the solar street lamp controller is more and more, and the degree of intelligence is more and more high, so the reasonable and scientific design of solar street lamp controller standards, quality and parameters is very critical. After years of experience in controller development and use, LUXMAN summarized the following principles:

High-quality electronic components

The life of the components determines the life of the solar lamp controller, so the controller must strictly control the raw material incoming inspection, Luxman chose the  Japan Rubycon capacitor, TI chip, the quality of these components is stable,

Accurate parameter setting

Pay attention to the controller and solar street light battery supporting, especially the battery voltage, solar street light controller and solar street light lighting module source matching, solar street light LED module input voltage and solar street light controller output voltage must be consistent. The power distribution of the solar street lamp controller should be reasonable, The lighting time and power of the street lamp should be reasonably distributed according to the power generation and storage capacity of the solar street lamp system.

Note that the lead acid battery solar street light controller and lithium battery  solar street lamp controller is not universal.

Reliable software performance

The performance of the software should be stable. Luxman’s controller software is based on many practical application parameters and feedback settings. The installation environment has a great impact on the lamps. For example, in Japan, Canada, and other countries, the sunshine time in winter is relatively short and the lighting time needs to be longer. Therefore, for different projects and applications, we provide customized program services to ensure that our products are stable.

Reasonable use of the management function

The current solar street lamp controller in addition to the regular function of time control(lights up for 12 hours every night), infrared (people come to light, people go to light out or dim), intelligent management output (the same electricity can ensure that the lights do not go out for a week or a month or even longer). We can also add a camera, Bluetooth connection, support app, pad, computer remote control, etc. these functions must be selected and set according to the needs of users.
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How to choose batteries for your solar street lamp project?

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LiFePO4 Battery 5g station

LiFePO4 Battery will dominate along with the Expansion of 5G

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Subtitle: China mobile first, centralized procurement bidding LiFePO4 Battery will be with 5G throughout China

On March 4, 2020, China Mobile Limited revealed its 2020 bidding announcement for the centralized procurement of lithium iron phosphate battery(LiFePO4 battery) products for the use of elecommunications.

It plans to purchase a total of 610.2 million Ah (specification 3.2V) for lithium iron phosphate batteries for telecommunications with no more than 2.508 billion CNY. Purchasing is required to complete within 1 year.

The construction of 5G base station is double or even several times the demand for iron lithium(LiFePO4). Zhongguancun new battery technology innovation alliance secretary general Mr Yu qingjiao said.

The replacement of lead acid by LiFePO4 Battery is the trend

“As far as we know, the Chinese tower purchased 30-40 billion CNY worth of batteries last year.” Yu revealed that lithium iron phosphate battery(LiFePO4) is currently the most suitable technology route for 5G base station energy storage. With the commercial promotion of 5G, lithium iron phosphate battery will usher in a new dividend period.

According to the introduction, the communication backup power supply is usually assembled in the base station machine room with the battery cabinet, in the case of the base station power supply emergency power, for the base station’s normal work and smooth communication to provide guarantee.

 

5G-system

 Lithium iron phosphate energy storage products

Some industry insiders said that the densely arranged 5G base stations show a trend of miniaturization and lightening, energy storage batteries need to use lithium batteries with higher energy density, and most of them use lithium iron phosphate batteries for standby power. “it is an inevitable trend for base station energy storage to replace lead acid with iron lithium”.

Compared with 3/4g communication, 5G base station requires high-density layout and shows a trend of miniaturization. Therefore, lithium iron phosphate battery with higher energy density has become the first choice for lead-acid battery. “A 5G base station on the roof, for example, can’t use heavy lead-acid batteries. It can only use iron-lithium batteries.” “China tower has not purchased lead-acid batteries since 2018,” Yu said.

In addition, 5G base station energy storage battery can not only be used as a backup power supply, but also be applied to the time-of-use electricity price “peak cutting and valley filling”. China unicom previously released 5G enabling ubiquitous power Internet of things 2020, including 5G base station energy storage peak adjustment application scenario. This means that the number of energy storage cycles in the base station will increase significantly.

According to the calculation, lead acid battery needs to be replaced about 6 times for 7,000 cycles, and iron phosphate lithium battery does not need to be replaced. At present, the cost of lithium iron phosphate battery is about RMB0.7/wh, which is twice that of lead-acid battery. However, under 7,000 cycle life, the cost of lithium iron phosphate battery is only one third of that of lead-acid battery.

Performance comparison of lead-acid battery and lithium iron phosphate battery(LiFePO4)

Charge/Discharge times1000~12007000~10000(decay to 70%)
Energy Density38~40WH/KG170~180WH/KG
Recycle90%Unknown
OthersMature technique, wide working range, float charge, low voltage or regular voltage design, good safety, good performance during shallow charge shallow discharge, high working voltage, poor performance during high current and deep dischargeNo memory effect, can high current deep discharge, suit for peak-shaving, float charge need a special design BMS for shallow charge shallow discharge

5G base station construction releases dividends

 It is estimated that from 2020 to 2023, the storage demand of standby power

brought by 5G base station is 7.6GWh, 9.7GWh, 10.8GWh and 11.9GWh respectively. If “5G+ peak adjustment” is realized, it will bring about a further substantial increase in the demand for lithium iron phosphate energy storage batteries.

20192020202120222023
Macro Base Station107090100110
5G base station power(W)27002700270027002700
Emergency Duration(H)44444
Single Base Station Capacity (KWH)10.810.810.810.810.8
Energy Storage Demand (GWH)1.17.69.710.811.9

Calculation of energy storage demand of 5G base station

According to the data of each operator’s annual report in 2018, there are at least 14.38 million base stations in China that need to be built or renovated. The energy consumption of a single station is 2700W and the number of emergency time is 4h. There is at least 155GWh battery capacity in the energy storage market. According to the SMM new energy database, China’s production of lithium iron phosphate may reach 98,000 tons in 2019, up 51% year on year, and will continue to grow at a high speed in 2020.

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https://luxmanlight.com/how-to-choose-batteries-for-your-solar-street-light-project/

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waterproof ip rating luxman light solar based products

The higher the waterproof rating, the better outdoor solar light is?

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Waterproof is the basic requirement for Outdoor Solar Lights products.

Outdoor solar lights are commonly used as outdoor applications. Water is inevitable cannot be avoided in outdoor locations. Therefore, a relatively higher level of waterproofing is required in order to achieve better performance in such environmental conditions. Often, we come across the label of IP65, IP66, and even IP67 in product packing. So, is the higher the waterproof level, the better for the product?

(1) Waterproof is Necessary for Solar Outdoor Products

For the above question, first, we need to understand why waterproofing is needed. During the long-term use of outdoor solar lamps, some liquid usually will condense on the solar-powered products due to the influence of day and night temperature changes. As we know that from middle school, when gas or vapor condenses or is condensed, it changes into a liquid.
In addition, the water of rainfall will splash directly onto the solar light product. If typhoons or hurricanes patronize to an area, then strong storms will bring water to try to destroy products exposed in unsheltered place. Therefore, there must be a sufficiently strong level of waterproof for the outdoor lighting system.

(2) Understand Waterproof Standards to Facilitate Product Selection

In this regard, we need to understand what the standard of waterproofing is. What kind of impact can each level of waterproof protect against for outdoor solar lighting?

For example, there is a product with IP65 label. Let’s see the meaning of IP, 6, 5 respectively.

The IP (INGRESS PROTECTION) protection level system was drafted by the IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION), which classifies electrical appliances according to their dust and moisture resistance characteristics. The IP protection level mark is composed of two numbers.
The first number indicates the level of the appliance to prevent dust and foreign objects from invading. The foreign objects include tools, fingers of human beings, and other small objects. All these objects can not touch any area that contains electricity insider the electrical appliance, outdoor solar LED lights, to avoid electric shock.
The second number indicates the tightness of the appliance against moisture and water. The higher the number, the higher the protection level.

LUXMAN - waterproof ip rating luxman lightAs an example, IP65 Solar LED Street Lights – IP rated as totally dust particulate protected and against water projected from a spray nozzle.

(3) General Advice When Selecting the Product Waterproof Level

High waterproof rating means a high manufacturing cost naturally. In order to deal with extreme weather that may encounter, expensive outdoor solar lights products with high waterproof rating are the utmost choices.
A) If there is not much storm and rain in an area and it is not a place often by typhoons/hurricanes, you can choose a solar outside lights product with a lower waterproof level of course. In desert zone of North Africa and the Middle East, the waterproof rating can be relatively low. All our products can meet the weather conditions in these places. For example, the S2 series can easily handle the conditions.
B) If it is in the Gulf of Mexico, the Caribbean, or the Pacific Islands, then high grade waterproof products need to be considered.

Waterproofing can reduce the risk of corrosion caused by water infiltration. However, according to our industrial experience, corrosion protection is the biggest issue for products used by the sea. After the metal is corroded, the water resistance is deemed to be poor, Waterproof becomes meaningless, regardless of how high the waterproof level has been made previously.

For this reason, it is critical that we shall choose the proper raw materials of the product and control the following manufacturing process. Efforts to this end, we have also particularly strengthened our investment in materials and processes to ensure that the products can meet the different applications of users. For instance, the battery case is water-resistant with an IP68 rating. Other companies will not put so much effort into adopting high standard process in components that cannot be seen by the naked eye of customers. Our S2 and S3 series solar powered led outdoor lights products are equipped with an IP68 waterproof batteries box as standard.

From this point, waterproof rating is a momentous aspect of product selection. But it is not the only criterion for selection. Comprehensive consideration of all aspects of the product is always the safe way. As for how to better choose the suitable solar led lights product, we are happy to provide our expertized solution in this regard.

 

 

LUXMAN-corona-virus-Letter 2020210

Notice About Recent Corona-virus

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Dear LUXMAN clients,

 

Thanks for your concerns about the China New Corona-virus. Our government is taking very effective measures to restrict the spread of Corona-virus. Because of our national strategic implementation capability, now everything is well under control.

We highly appreciate your continued trust and support. Our LUXMAN team worked hard to reduce the negative impact, even during the Chinese New Year Holiday.

Thanks to Luxman’s professional management team and effective systems, we have already resumed orderly production. Now all orders are being produced as scheduled. LUXMAN will deliver your ordered product timely and carefully.

During this special time, your understanding and support is extremely valuable. The Luxman Team has confidence and the ability to provide you with professional and responsible service as always.

Thanks again for your cooperation and understanding.

Best wishes.

Luxman Team

 

luxman light Coronavirus letter 202002

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solar-led-lights-last-longer-illumination-hours-seaside

5 Tips to Make Solar LED Lights Last Longer

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It is important to properly position and maintain luminaires or lighting fixtures in order to make Solar LED Lights last longer.

By doing this, we let Solar LED Lights absorb as much solar irradiance energy as possible for longer periods of lighting.

1. Regular Cleaning of Solar Panel

Solar LED street lights for outdoor need solar panels to absorb radiant energy. Cleaning helps solar panels to maintain the maximum energy absorption of solar radiation and provide long-term illumination.

During the production in our factory and the following on-site installation of solar light fitting, we have considered optimizing the product to keep it clean enough and avoid attracting too much dust and debris. For example, the installed solar panels usually keep an inclined angle to prevent birds from resting on it. Bird droppings, leaves, and other debris can hinder the solar panel’s ability to collect sunlight.

You also need to pay attention to the degree of cleanliness. If air pollution in some areas are serious, or some cities are near the desert, then the dust is more than other places, you need to wipe the panel surface regularly.

Obviously, stacked snow on Solar lights panel will affect the absorption of the solar irradiation energy. As a result, the lighting system does not have a peak performance if you are in an area that is cover with large amounts of snowfall, be prepared to take them down for the winter.

 

2. Place Lighting Luminaries in an Unobstructed Place

Make sure that they are in a place with the strongest sunlight throughout the day and not blocked by the shadows of plants or buildings. Plants are not possibly blocking the panel all the time, but it reduces the time of direct sun shines on the solar panel. It means that the length of lighting available at night will be reduced. Take necessary measures to adjust the installation distance, or trim the branches to ensure sufficient sunlight.

 

3. Improper On-site Parameters Setting Resulting in Shorter Lighting Time

According to many on-site feedbacks, some construction workers respond that they have not been informed of the specific function and use of the remote control of solar lamp outdoor. They are only responsible for lighting up the lamp and care about nothing else. In such cases, the parameters may be set incorrectly which is causing abnormal lighting, excessive battery consumption, and reducing lighting hours. The remote control of LUXMAN luminaire with a humanized control method design is simple and convenient. You can switch to the best mode that suits your needs. Before installation, confirm with us for selecting the best mode for your location and make sure it is the correct mode during installation.

 

4. Long Time Rainy Days Reduce Hours of Illumination

If the weather forecast says it will rain for a long period of time and exceed the maximum designed lighting time of the product, you can choose to turn off the solar led lights with switch. This method is mainly to avoid inefficient charging on rainy days and extend battery life.

 

5. Malfunctions of Solar LED Street Lights Reduces the Lighting Time

According to the indicators of solar light, our users can identify whether the problem belongs to the solar panel, the LED bulb, or the battery. Check for the possible hidden problems and troubleshoot to ensure that the lighting time can reach the desired length.

Some split solar panels have longer distances between solar panels and lamps，and the long distance has caused unexpected problems. Extending the solar panel connecting wire at will may cause line loss, lower charging efficiency, and affect lighting time. There is also one reason that the user might purchase wire with poor quality.

Another typical problem is the aging problem of the product. With the accumulation of service hour, the battery quality naturally ages, especially the lead-acid battery which is used in earlier products. The number of charge and discharge is relatively small for a lead-acid battery. The battery needs to be replaced when it expires or out of performance. Just change it and restore long hours of lighting.

Related article:

https://luxmanlight.com/top-3-factors-to-choose-outdoor-solar-lights-properly/

https://luxmanlight.com/how-to-choose-all-in-one-solar-street-light/

https://luxmanlight.com/how-to-choose-batteries-for-your-solar-street-light-project/

solar light charge on a cloudy day

Can Solar Lights Charge on a Cloudy Day?

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Did you ever think that Solar Light could charge on Cloudy Days?

 

A question often mentioned is whether Solar Lights for roads can be charged on cloudy days or without the sun. The answer is yes.

SOLAR CELL CHARGING UNIT IS SENSITIVE TO LIGHT DENSITY

Because the charging components on the solar panel are very sensitive to light density/luminous intensity. As long as the light density is sufficient, the solar panel can collect energy and begin its charging process to the solar lights for outdoor.

solar lights charge on cloudy days

LIGHT DENSITY STILL EXIST IN CLOUDY DAYS

Although the direct sunlight will be blocked on cloudy days, the solar-based lights are still receiving a charge. The clouds are diffusing the strength of the sunlight but solar irradiance is still transmitted from the sun to the earth. So, the solar power system still charges during cloud cover.

Furthermore, when puffy cumulus clouds cover the sun, from time to time the sunlight will penetrate holes in the clouds. Once it happens, the solar panels absorb not only the direct sunlight but also the sunlight reflected by the cloud.
In cloudy conditions, the sunlight or the luminous intensity is sufficient for charging in most cases.

CLOUDY CITIES SOLAR STREET LIGHTS MARKET ARE BOOMING

Cities such as San Francisco, Seattle, Portland, and Boston are famous for their cloudy and cool weather and do not have the same sunshine condition as Las Vegas. However, the solar street light markets are booming simply because that the cloudy days can also provide solar street lights with considerable charging.

CHARGING EFFICIENCY DURING CLOUDY DAYS

Although it can be charged on cloudy days, the charging speed will be slower. The irradiance on a cloudy day or in shadow may only get 1/2 or 1/5 than what it is on a sunny day.

The good news is that charging efficiency might be better during cloudy days. When charging, the temperature of the solar panel is high when there is direct sunlight, and the charging efficiency decreases. On the other side, the temperature is much more likely in the interval where the solar panel charging is highly efficient when cloudy.

In summary, the solar-powered lights system can be charged on cloudy days. Even there are continuous cloudy days, most solar-powered lights provide lighting with the stored energy. If you live in a cloudy and cool area, you can still buy solar systems such as solar-powered lights for yard, walkway, garden.