Archive for category: Insights & Knowledge

In a lot of African countries, installing solar street lights has been a viable option for lighting up the roads. So what fuels the growth? And what do decision-makers need to be aware of when purchasing solar streetlights?

Why are solar streetlights becoming increasingly popular?

One of the biggest advantages of a solar street light is that it doesn’t need any other power supply equipment. So, the local government doesn’t need to worry about the installation of other complex equipment. In addition, it is easier to install and does not require complex wiring.

Secondly, the total long-term cost of having solar street lights is less than running traditional street lights, due to the continuous decline in the cost of battery and solar energy technology. The electricity cost saved by solar streetlights is enough to offset the initial cost of installing them.

Thirdly, solar street lights, being low-voltage products, are safer than high-voltage electric street lights. Interestingly, that’s exactly the reason that solar street lights are recommended to be used in oil fields, mines, remote gas stations, the chemical industry, and other places with high safety requirements.

So, what’s the catch then?

Unfortunately, there are now mixed suppliers in the solar street lights industry, both good and bad.

To get more business, some greedy manufacturers produce low-quality products with shoddy standard parameters, causing a large number of performance issues which lead to many people opting for electric street lights instead of solar street light products.

Some customers lost faith in Chinese products. They think that Chinese products break easily. Here are some of the “horror stories” I’ve personally known over the years.

Story-1: Solar street light project in Bangladesh on fire:

A Bangladeshi distributor recently complained to the reporters that a batch of split solar street lights which he bought from Zhongshan City, China, caught fire after installation within only 1 year.

To make matters worse, the manufacturer could no longer be found. His clients were very angry with him and would no longer trust him and his reputation which he had maintained for a very long time was destroyed.

He reported that he lost a lot of money, but to compensate his customers and regain his reputation, he must find a high-quality manufacturer instead of employing the cheap ones like he used to.

So what went wrong? From the screenshots of the chat, it can be seen that:

Image: Recycled ternary lithium-ion lithium battery inside of a poor quality product.

After disassembly, he found a recycled ternary li-ion lithium battery and a dilapidated circuit board

Image: A dilapidated circuit board

The specifications of solar panels written by the manufacturer are 280WP and battery 90Ah, but after the disassembly, it can be seen that the actual solar panel is only 50W and the battery 10Ah.

Image: Chat history with the manufacturer

 It can be seen from the run-down appearance that the battery used is not the lithium iron phosphate battery claimed by the manufacturer, but a left-over disassembled ternary lithium battery (cell 18650, 3.7V, 2.6Ah).

Furthermore, the 50W solar panel is too large for the 10Ah battery. Either the manufacturer is unprofessional or he purposefully makes the solar panel look larger to scam his customers.

Then why did this distributor buy them in the first place? The answer is simple: it’s cheap.

Story- 2: The Iraqi government no longer believes in solar street lights

In 2017, the Iraqi government purchased a batch of low-quality solar street lights from Yangzhou City, and all solar street lights broke within 6 months.

Later, the Iraqi government stopped purchasing solar street light products, and all changed to municipal circuit lights.

Story-3: The Spanish solar street light project needs after sales of Continuous maintenance

In 2018, a Spanish engineering company purchased 1,700 sets of split solar street lights from a solar street light factory in Xixiang District, Shenzhen city. After a little more than a year of installation, a large number of street lights broke and required constant repairs and maintenance.

 Later, the manufacturer also disappeared without taking responsibility.

Story-4: Haiti compensation for losses

1,400 sets of solar street lights were installed on a national highway in Haiti that broke down within one year.

When the customer asked the manufacturer to fulfill the warranty commitment, the manufacturer directly blocked the customer and disappeared, which led to the customer developing a negative view of solar street lights.

Story-5: A senior Pakistani official was arrested

In 2015, for Pakistan’s 40,000 sets of solar street lights project, a Pakistani female senior official personally searched for Chinese factories.

A good quality factory quoted a minimum price of 1,300 RMB per unit, but the Pakistani female senior officials demanded 900 RMB per unit, the factory refused as the price was not enough to buy the required materials.

Meanwhile, another factory promised that it could be done for 900 RMB, and even gave the senior woman a “kickback” commission of 200 RMB per unit, leaving the price of solar street light products to only 700 RMB per unit. How was that possible? To cut costs, the supplier used cheap materials of poor quality.

It turned out, nearly all 40,000 sets of lamps were broken in less than 6 months. This high-level female official was arrested and has been in jail ever since.

Story-6: The split solar street lights in Mexico flicker frequently:

In the middle of the Mexican highway, several street lights are installed, but every single one of them flickers frequently. The road looks very frightening at night.

The contractor for this project has one year to settle the final payment, but the government refuses to pay for this project since the street lights are defective and don’t work properly.

Conclusion: Bad practices of poor-quality solar street light manufacturers    

To summarize, buyers need to be aware of these bad practices.

Exaggerating the product specs

The 50W solar panel is marked as 280W, and the 12-15% low conversion efficiency solar panel acts as a 21% high conversion efficiency solar panel.

LED light source 10W is marked as 100W-200W, low-level LED chips pretend to be high-quality LED chips, such as copper wire connection pretending to be gold wire connection, etc. Low luminous efficiency imaginary labeling is high luminous efficiency. The battery 10Ah is marked as 90Ah, the ternary lithium battery is marked as a lithium iron phosphate battery, and the old battery is marked as a new battery. The lead-acid battery is filled with cement.

Inexpensive controllers act as MTTP stabilization controllers, reducing the thickness of the light poles.

Unprofessional service and poor installation instructions 

Unprofessionalism and wrong specs affect the solar street lights a lot.

For example, if the pole of the solar street light is kept too high, the light range will be too wide which will result in the light being dull and wasted.

Here’s an example: poor installation instructions were given to customers.

Solar panels shouldn’t be placed under some shades

On the other hand, if the pole is kept too short, the light will be too concentrated and bright. It will also not cover the required area and some spots on the road will be left in the dark.

In addition, if the voltage of the street light is too low, the light will be very dull while if the voltage is too high, it will cause wastage of light, over-brightness, and higher bills.

Blocking the customers and disappearing

Fraudulent manufacturers lie to the customers about the lifespan of the product, promising years’ warranty while the product only lasts months. When the product doesn’t work the way it’s supposed to and the customers demand compensation for the damage, these manufacturers would simply disappear.

These manufacturers know that they are scamming the customers but these frauds still tell them the wrong specs to get money from their pockets.

How to pick good Solar Street Light suppliers?

However, not all Chinese solar street light products are bad of course.

There is one thing in common among all these stories mentioned above: the buyers all went for astonishingly low prices. It might sound like common sense that low prices can’t buy high-quality solar street lights, but a lot of buyers still think they might get lucky.

In reality, exceptionally low prices almost always are equal to poor-quality solar street lights. Poor quality solar street lights make you lose money and you will need continuous after-sales maintenance. Some serious cases also lead to the reputation of the distributor being tarnished and him/her going to jail or paying great sums of money.

It’s a fact that the material used in solar street lights is expensive and the cheap rip-offs can never fulfill the function of high-quality solar street lights.

The distributors should choose a quality solar street light factory they can fully trust and connect with in case they are unsure about something. Doing this is not only a good monetary investment but will also save them a lot of trouble in case they have some concerns or questions regarding the products.

In an era marked by growing concerns about climate change and the depletion of non-renewable energy sources, solar energy has emerged as a promising solution for sustainable power generation. Solar street lights with poles and batteries offer an efficient and eco-friendly alternative to traditional street lighting systems. This article aims to provide comprehensive information about solar street lights, their components, benefits, and practical considerations, catering to solar energy buyers and individuals seeking a simple understanding of this innovative lighting solution.

 

Understanding Solar Street Lights

 

Solar streetlights consist of the following key components:

1. Solar Panels: Solar panels, also known as photovoltaic (PV) panels, are the primary component of solar street lights. These panels capture sunlight and convert it into electrical energy through the photovoltaic effect. They are typically made of multiple interconnected solar cells, which generate direct current (DC) electricity.
2. Battery Systems: Solar street lights incorporate battery systems to store the electrical energy generated by the solar panels. These batteries provide power for the LED lights during nighttime or when sunlight is insufficient. Common battery types used in solar street lights include lithium-ion, lead-acid, and gel batteries.
3. LED Lights: Light Emitting Diode (LED) lights are highly efficient and long-lasting sources of illumination used in solar street lights. LEDs consume less energy than traditional lighting technologies and offer better luminous efficacy, ensuring optimal utilization of stored energy.
4. Pole Structure: The pole structure serves as the support and mounting platform for the solar panels, battery systems, and LED lights. It is typically made of durable materials such as aluminum or steel, ensuring stability and durability in outdoor environments. The pole also houses wiring and electrical connections, protecting them from environmental elements.

 

1.2 How Solar Street Lights Work:

 

Solar street lights operate in a simple and efficient manner, utilizing the following process:

 

Solar Energy Conversion: During daylight hours, solar panels absorb sunlight and convert it into electrical energy. This process occurs through the photovoltaic effect, where sunlight excites electrons in the solar cells, generating a flow of electrical current.

 

1. Energy Storage: The electrical energy generated by the solar panels is stored in the battery systems. The batteries ensure a continuous power supply for the LED lights, enabling them to function during periods of low sunlight or at night.

 

1. Intelligent Control: Solar street lights are equipped with intelligent controllers that regulate the flow of electrical energy. These controllers automatically detect ambient light levels and turn the LED lights on and off accordingly. This feature ensures efficient energy utilization and prolongs battery life.

 

1. Illumination: When ambient light levels decrease, such as at dusk or during overcast conditions, the LED lights are powered on, providing illumination. The efficient LED technology used in solar street lights produces bright, white light, creating a safe and well-lit environment for pedestrians and vehicles.

 

1. Continuous Operation: Solar street lights can operate autonomously, relying solely on solar energy for power. During daylight hours, the solar panels recharge the battery systems, ensuring uninterrupted operation throughout the night. In areas with limited sunlight, larger battery capacities may be employed to extend the lighting duration.

 

By harnessing the sun’s energy and utilizing efficient components, solar street lights offer an environmentally friendly, cost-effective, and reliable lighting solution for various applications, including streets, parking lots, parks, and other public spaces.

 

Related Article:

 

Benefits of Solar Street Lights

 

Solar street lights offer numerous benefits, making them an attractive choice for various applications. The following sections outline the key advantages of utilizing solar street lights:

 

2.1 Energy Efficiency and Cost Savings:

 

Solar street lights are highly energy-efficient and offer substantial cost savings in the long run. Here’s why:

 

1. Reduced Electricity Costs: Solar street lights rely on solar energy, eliminating the need for grid power. By harnessing sunlight during the day, these lights operate independently of the electrical grid, resulting in significant savings on electricity bills.

 

1. Efficient LED Lighting: Solar street lights utilize LED technology, which is highly energy-efficient compared to traditional lighting sources. LEDs consume less power while providing superior brightness and longer lifespan, translating to further energy savings and reduced maintenance costs.

 

Related Article:  https://www.Clodesun.com/hybrid-mains-complementary-solar-street-light/

 

2.2 Environmentally Friendly Lighting Solution:

 

Solar street lights are an eco-friendly alternative to conventional lighting solutions, contributing to a sustainable and greener environment. Here’s how:

 

1. Reduced Carbon Footprint: Solar street lights operate using clean and renewable solar energy, minimizing carbon emissions associated with electricity generation from fossil fuels. By adopting solar street lights, communities can actively contribute to mitigating climate change and reducing air pollution.

 

1. Light Pollution Control: Solar street lights are designed to emit directional light, focusing illumination on desired areas and reducing light pollution. This helps preserve the natural darkness of the night sky, protecting ecosystems and supporting nocturnal wildlife.

 

2.3 Easy Installation and Maintenance:

 

Solar street lights offer ease of installation and require minimal maintenance, making them a convenient lighting solution. Consider the following advantages:

 

1. Simplified Wiring: Solar street lights have a self-contained design, requiring minimal wiring compared to grid-powered lights. This simplifies the installation process and reduces installation time and costs.

 

1. Low Maintenance Requirements: Once installed, solar street lights have low maintenance needs. The absence of complex electrical components and the durability of the system result in reduced operational costs over the long term.

 

2.4 Enhanced Safety and Security:

 

Solar street lights contribute to safer and more secure environments, benefiting both pedestrians and motorists. Here are the advantages:

 

1. Consistent Illumination: Well-lit streets enhance visibility and improve safety for pedestrians and drivers, reducing the risk of accidents and criminal activities. Solar street lights provide consistent illumination, ensuring well-lit public spaces even during power outages.

 

1. Off-Grid Operation: Solar street lights operate independently of the electrical grid, making them immune to grid failures or blackouts. This ensures uninterrupted lighting, promoting safety and security in areas prone to power disruptions.

 

By harnessing solar energy, solar street lights offer energy efficiency, cost savings, environmental benefits, easy installation and maintenance, and enhanced safety and security. These advantages make them an attractive choice for solar energy buyers and individuals seeking sustainable and reliable lighting solutions.

 

Components of Solar Street Lights

 

Solar street lights consist of several essential components that work together to provide efficient and sustainable lighting solutions. This section elaborates on the key components of solar street lights:

 

3.1 Solar Panels:

 

Solar panels are the heart of solar street lights, responsible for capturing sunlight and converting it into electrical energy. Here’s a closer look at solar panels:

 

1. Sunlight Absorption: Solar panels, also known as photovoltaic (PV) panels, are composed of multiple interconnected solar cells. These cells are made of semiconductor materials, such as silicon, that absorb sunlight and convert it into direct current (DC) electricity through the photovoltaic effect.

 

1. Power Output: The power output of solar panels depends on factors such as the surface area, efficiency of the solar cells, and the intensity of sunlight. Solar panels are designed to maximize sunlight absorption, ensuring optimal energy production throughout the day.

 

1. Durability: Solar panels are constructed to withstand various weather conditions, including rain, snow, and hail. They are typically protected by a tempered glass cover and encapsulated in a durable frame, ensuring longevity and resistance to environmental elements.

 

3.2 Battery Systems:

 

Battery systems play a vital role in solar street lights, storing the electrical energy generated by the solar panels. Here’s an overview of battery systems used in solar street lights:

 

1. Energy Storage: Battery systems store the excess electrical energy produced by the solar panels during daylight hours. This stored energy is utilized to power the LED lights during nighttime or when sunlight is insufficient.

 

1. Battery Types: Commonly used battery types in solar street lights include lithium-ion, lead-acid, and gel batteries. Each type has its advantages and considerations, such as energy density, lifespan, and maintenance requirements. Lithium-ion batteries are increasingly preferred for their high energy density, longer lifespan, and reduced maintenance needs.

 

1. Capacity and Autonomy: The battery capacity determines the amount of energy that can be stored and supplied to the LED lights. The capacity should be carefully chosen to ensure sufficient energy autonomy for the desired lighting duration, even during consecutive cloudy days.

 

3.3 LED Lights:

 

LED lights are the primary source of illumination in solar street lights, offering energy-efficient and long-lasting lighting solutions. Consider the following aspects of LED lights:

 

1. Energy Efficiency: LED lights are highly energy-efficient, consuming less power compared to traditional lighting technologies. This efficiency allows solar street lights to maximize the utilization of stored energy, extending lighting duration.

 

1. Luminous Efficacy: LED lights have a high luminous efficacy, meaning they produce more light output per unit of power consumed. This results in brighter illumination while minimizing energy waste.

 

1. Long Lifespan: LED lights have a significantly longer lifespan compared to traditional lighting sources. This reduces maintenance costs and the need for frequent light replacements.

Related:

3.4 Pole Structure:

 

The pole structure serves as the support and mounting platform for various components of solar street lights. Here’s an overview of the pole structure:

 

1. Stability and Durability: The pole structure is typically made of durable materials such as aluminum or steel. This ensures stability and durability, allowing the solar street lights to withstand harsh weather conditions and environmental stresses.

 

1. Wiring and Electrical Connections: The pole structure houses the wiring and electrical connections required to connect the solar panels, battery systems, and LED lights. Proper insulation and protection of these components ensure safe and reliable operation.

 

1. Height and Design Considerations: The height and design of the pole structure should be chosen to meet specific lighting requirements, ensuring optimal light distribution and coverage for the intended application.

 

By incorporating solar panels, battery systems, LED lights, and a sturdy pole structure, solar street lights provide a comprehensive and efficient lighting solution.

Related:

 

Key Considerations for Solar Street Light Buyers

 

When considering the purchase of solar street lights, there are several crucial factors to keep in mind. This section highlights key considerations that buyers should take into account to ensure the effectiveness and suitability of their solar street lighting solution:

 

4.1 Location and Sunlight Availability

 

The location and sunlight availability play a significant role in the performance of solar street lights. Consider the following factors:

 

1. Sunlight Exposure: Assess the amount and duration of direct sunlight the installation location receives throughout the year. Solar panels require optimal sunlight exposure to generate sufficient energy. Locations with obstacles that cast shadows, such as tall buildings or trees, may affect the performance of solar panels.

 

1. Orientation and Tilt: Determine the best orientation and tilt angle for the solar panels to maximize sunlight absorption. The angle should be adjusted based on the geographical location to ensure the panels capture the most sunlight possible.

 

4.2 Battery Capacity and Autonomy

 

The battery capacity and autonomy of solar street lights are crucial for reliable operation. Consider the following aspects:

 

1. Lighting Duration: Assess the required lighting duration and select a battery system with sufficient capacity to meet those needs. The battery should have enough stored energy to power the LED lights throughout the night and during consecutive cloudy days.

 

1. Autonomy Calculation: Consider the number of days the solar street lights need to operate without receiving direct sunlight. This will help determine the required battery capacity for optimal autonomy.

 

4.3 Durability and Weather Resistance

 

Solar street lights should be durable and capable of withstanding various weather conditions. Consider the following factors:

 

1. Construction Materials: Opt for solar street lights made of high-quality materials, such as corrosion-resistant aluminum or robust steel, to ensure durability and longevity.

 

1. IP Rating: Check the Ingress Protection (IP) rating of the solar street lights. A higher IP rating signifies better protection against dust and water ingress. Look for IP65 or higher for adequate weather resistance.

 

1. Impact Resistance: Ensure the solar street lights are designed to withstand external impacts, such as strong winds or accidental collisions. Sturdy construction and suitable pole design contribute to enhanced durability.

 

4.4 Lighting Performance and Control

 

Evaluate the lighting performance and control options to meet specific requirements. Consider the following factors:

 

1. Luminous Efficacy: Assess the luminous efficacy of the LED lights to ensure optimal brightness while minimizing energy consumption. Look for high-quality LEDs with efficient light output.

 

1. Lighting Control: Determine the desired lighting control options, such as motion sensors or dimming capabilities. These features enhance energy efficiency by adjusting lighting levels based on occupancy and ambient light conditions.

 

1. Intelligent Controllers: Consider solar street lights equipped with intelligent controllers that regulate charging, battery management, and lighting control. These controllers optimize energy utilization, prolong battery life, and ensure efficient operation.

 

By considering the location and sunlight availability, battery capacity and autonomy, durability and weather resistance, and lighting performance and control options, solar street light buyers can make informed decisions and select a suitable lighting solution that meets their specific requirements. These considerations ensure optimal performance, longevity, and energy efficiency of the solar street lights.

 

Related Article:

 

Conclusion

Solar street lights with poles and batteries offer a sustainable and efficient lighting solution for various applications. By harnessing solar energy, these lights provide numerous benefits such as energy efficiency, cost savings, environmental friendliness, easy installation and maintenance, and enhanced safety and security. Understanding the components of solar street lights, including solar panels, battery systems, LED lights, and pole structures, is essential to grasp their functionality.

 

Buyers of solar street lights should consider key factors to ensure the effectiveness and suitability of their lighting solution. Factors such as location and sunlight availability, battery capacity and autonomy, durability and weather resistance, and lighting performance and control play crucial roles in determining the optimal choice.

 

With proper consideration of these factors, buyers can select solar street lights that meet their specific requirements and provide reliable and sustainable illumination for streets, parking lots, parks, and other public spaces.

 

Solar street lights with poles and batteries pave the way for a greener and more sustainable future, contributing to the reduction of carbon emissions, energy savings, and improved safety and security. By embracing solar energy, communities and individuals can make a positive impact on the environment while enjoying the benefits of efficient and cost-effective lighting solutions.

 

References:

• How Stand Alone Solar Street Light System Compares With Centralized Solar System?
• Solar Street Lights
• Advantages and Disadvantages of Solar Power and Solar Street Lights
• How Solar Street Lights Benefit Our Life
• Solar Street Lights: How Good Are They?

As we know, the dust cover on the solar panel would reduce the solar power generation efficiency. So we need to clean the solar panel after installation regularly. especially in the Middle East area with Sandstorm Weather, It is easy to use a piece of equipment to clean the solar panel’s array that is mounted on the roof or ground, but it’s difficult to clean a single solar panel that is installed on a high post. And labor cost is high to manually clean the hundreds and thousands of solar panels on each solar street light pole.

Smart Self-Cleaning Solar Street Light Technical Solution

The automatic smart self-cleaning system is the best solution, The system is powered by a solar panel and automatically cleans the solar panel in the morning and afternoon. no need to pay extra costs for cleaning dust while keeping the solar panel at high efficiency.

This technology has solved the problem of solar panels that can carry out automatically cleaning solar panels and road lamp caps simultaneously with rainwater, automatically cleans solar panels to remove dust and sand, solving the long-standing global issue which is to avoid PV energy input with 50% lower efficiency by dust and bird dropping cover, keeping PV with maximum charge efficiency always for years, high illuminating effect.

Clodesun’s Smart Self-Cleaning Solar Street Light

Clodesun’s self-cleaning range of solar lighting is designed for areas where sea spray, dust, dirt, or snow may cover the panel preventing the battery from being charged fully. Available in 40, 60, 80, 100, and 120w outputs catering for multiple applications. All models feature the unique automatic solar panel self-cleaning function that automatically cleans the solar panel, the cleaning bars sweep over the panel up and back three times in the morning and then once every six hours. The integrated design incorporates a high-efficiency solar panel, Lithium-ion battery, and LED array in one, easy-to-install package without the need for trenching cabling, or an electrician.

The Beneficial Effect of Smart Self-Cleaning Solar Street Light

This innovative self-cleaning solar light removes accumulated dust, bird droppings, and fallen debris from its solar panel. Keeping its solar panel free of unwanted debris helps to maximize sunlight exposure and subsequent brightness, battery life, and longevity of the light. With a high-quality battery, the self-cleaning light provides up to 7 nights of continual lighting, and a built-in temperature control system allows it to work in freezing temperatures.

Conclusion

Smart Self-Cleaning Solar Street Light is slowly maturing and is popular in the Middle East, which increases the conversion efficiency of solar panels keeping PV with maximum charge efficiency always for years, high illuminating effect.

There are about 5 smart self-cleaning solar street light manufacturers in China that are fulfilling the need of the people. Moreover, their products are high-class and genuine, and long-lasting.

Bonus: ClodeSun Solar

ClodeSun (CLODE Optoelectric Co., Ltd.) was established in 2013. Headquartered in Shenzhen, it is a high-tech enterprise in China. But ClodeSun sells a lot of products in Europe.

Clodesun launched a foldable design all in one solar street light in 2021, which are designed by our German team for more than 1 year and tested for 2 years. This light stands out among various integrated solar streetlights. It is widely praised by customers all over the world.

There are a lot of solar street light brands in the Malaysian market these years, maybe different brands of solar street lights have different prices because the solar street light accessories, sizes, and Capacities are not the same, another critical factor is the location of the suppliers, with this out of the way, there are different solar street lights in Malaysia and their prices.

40w Solar Street Light Price in Malaysia price is 150$-250$

Specification:1. Double-sided Solar Panel: 60W DC18V (High-efficiency Monocrystalline )
2. LED Power: 40W (5050 Cree LED chip from US), 160 lm/w
3. Battery: LiFePO4 Lithium, 18-24Ah×12.8V
4. Controller: MPPT
5. CCT: 6000K (3500-6000K can be customzied)
6. Work Time: Continuously 3-5 rainy days, 12 hours per night
7. Control Mode: Light/ Time/ Microwave sensor control
8. Recommend Installation Height: 4m
9. Recommand Installation Distance: 15-20m
10. Certifications: CB, CE, IK10, FCC, IP67, SGS, COC, NSS
11. Lamp Housing: Die-cast Aluminum

60w Solar Street Light Price in Malaysia price is 200$-320$

1. Double-sided Solar Panel: 80W DC18V (High-efficiency Monocrystalline)
2. LED Power: 60W (5050 Cree LED chip from US), 160lm/w
3. Battery: LiFePO4 Lithium, 24-36Ah×12.8V
4. Controller: MPPT
5. CCT: 6000K (3500-6000K can be customzied)
6. Work Time: Continuously 3-5 rainy days, 12 hours per night
7. Control Mode: Light/ Time/ Microwave sensor control
8. Recommend Installation Height: 6m
9. Recommand Installation Distance: 20-25m
10. Certifications: CB, CE, IK10, FCC, IP67, SGS, COC, NSS
11. Lamp Housing: Die-cast Aluminum

80w Solar Street Light Price in Malaysia price is 250$-350$

1. Double-sided Solar Panel: 100W DC18V (High-efficiency Monocrystalline)
2. LED Power: 80W (5050 Cree LED chip from US), 160lm/w
3. Battery: LiFePO4 Lithium, 36Ah×12.8V
4. Controller: MPPT
5. CCT: 6000K (3500-6000K can be customzied)
6. Work Time: Continuously 3-5 rainy days, 12 hours per night
7. Control Mode: Light/ Time/ Microwave sensor control
8. Recommend Installation Height: 6m
9. Recommand Installation Distance: 20-25m
10. Certifications: CB, CE, IK10, FCC, IP67, SGS, COC, NSS
11. Lamp Housing: Die-cast Aluminum

100w Solar Street Light Price in Malaysia price is 320$-400$

1. Double-sided Solar Panel: 140W DC18V (High-efficiency Monocrystalline)
2. LED Power: 100W (5050 Cree LED chip from US), 160lm/w
3. Battery: LiFePO4 Lithium, 42Ah-48Ah×12.8V
4. Controller: MPPT
5. CCT: 6000K (3500-6000K can be customzied)
6. Work Time: Continuously 3-5 rainy days, 12 hours per night
7. Control Mode: Light/ Time/ Microwave sensor control
8. Recommend Installation Height: 8m
9. Recommand Installation Distance: 25-30m
10. Certifications: CB, CE, IK10, FCC, IP67, SGS, COC, NSS
11. Lamp Housing: Die-cast Aluminum

120w Solar Street Light Price in Malaysia price is 350$-490$

1. Double-sided Solar Panel: 160W DC18V (High-efficiency Monocrystalline)
2. LED light: 120W (5050 Cree LED chip from US), 160lm/w
3. Battery: LiFePO4 Lithium, 48Ah-54Ah×12.8V
4. Controller: MPPT
5.CCT: 6000K (3500-6000K can be customzied)
6. Work Time: Continuously 3-5 rainy days, 12 hours per night
7. Control Mode: Light/ Time/ Microwave sensor control
8. Recommend Installation Height: 8-12m
9. Recommand Installation Distance: 30-35m
10. Certifications: CB, CE, IK10, FCC, IP67, SGS, COC, NSS
11. Lamp Housing: Die-cast Aluminum

Conclusion

All the prices above were gotten from a survey of  China solar street light manufacturers’ prices, these are the prices of the most popular solar street light products on the Malaysian market.

Solar street light is charged by solar panel in the daytime and work at night, there is a built-in lithium battery, and different solar panel and battery configuration can meet different illumination requirement. In this article, Clodesun will introduce the solar street light design calculation.

Solar Street lights Battery Design

Step 1, calculate the current:

For example 12V battery system; 60 watts solar street light power.

Current(A) = 60W ÷ 12V = 5 A

Calculate the battery capacity demand:

For example, the cumulative lighting time of a street lamp every night needs to be 7 hours (H) with a full load;

(for example, open at 8:00 p.m., close 1 road at 11:30 p.m., open 2 roads at 4:30 a.m., and close at 5:30 a.m.)

It needs to meet the lighting requirements of 5 consecutive rainy days. (5 days plus the night before the rainy day, 6 days in total)

Battery capacity = 5A × 7h × (5 + 1) days = 5A × 42h = 210 ah

Calculation of solar street lamp solar panel

3： Calculate the peak demand (WP) of the solar panel

The cumulative lighting time of the street lamp every night needs to be 7 hours (H);

★: the average daily effective illumination time of the solar panel is 4-5 hours (H);

At least 20% of the reserved amount for the solar panel needs to be reserved.
the rated power of the LED lamp in a solar streetlight is 30W at 12V.

LED brightness at night will be set as 1 hour 60% + 5 hours 100% + 6 hours 40%

3 days of autonomy, in other ways, it can support 3 rainy/cloudy days

battery type is LiFePO4 batteries, the DoD would be 80%

Step 2: Calculate the daily energy consumption of the LED lamp

the current consumption of the LED lamp = 30/12 = 2.5Amps

the total power consumption in a day = 8 hours at 100% brightness

so the daily power consumption = 2.5 x 8 = 20Ah.

Step 3: Considering the 3 days’ autonomy
if we design solar-powered streetlights that can sustain for 3 rainy/cloudy days, then we should multiply daily power consumption by days of autonomy

that will be, 20Ah x 3 = 60Ah.

Step 4: Considering the depth of discharge.

in this example, our battery type is LiFePO4, and Its DoD is 80%

so the battery size should be 60Ah/80% = 75Ah

Solar Street Light Solar Panel Design

The electricity generated by solar panels should be used to make up for the electricity that was used last night, and at the same time, the electricity to be used tonight should be fully charged, that is,

Solar panel power generation = daily power consumption * 2

Solar panel power generation = solar panel power * installation site sunshine peak hours * power generation efficiency

Solar panel power=daily power consumption*2/(peak hours of sunshine at installation location*generation efficiency)

The peak sunshine hours of the installation site can also be found on the Internet, we will take 4 (most places are around 4 hours unless other places with particularly good sunshine can reach 5 hours).

The power generation efficiency of solar systems is generally 70-75%.

Solar Street Light Pole Height Design

The height of the solar power street light directly affects the illumination range of the led lamps. The higher the light pole, the wider the illumination range according to the Pythagorean theorem.

Scenic spots and parks are generally suitable for installing solar power street lights of about 7 meters, At night, the traffic of pedestrians and vehicles on rural roads is not large, so it is generally installed by one-sided interactive lighting, and the installation distance is about 20-25 meters. If it is less than 20 meters, part of the lighting will be affected. In addition, one more street light should be installed at the corner to avoid lighting blind spots.

solar power street light installation 3D photometric drawing

If you want to install a solar power street light with a pole height of 8 meters, you must ensure that the distance between the street lights is 25-30 meters. You should use the cross-lighting method for installation on both sides. This method is mostly used for road lighting with a width of 10 -15 meters.

For roads with 12-meter light poles, the longitudinal spacing of solar power street lights is generally recommended to be 30-50 meters. Symmetrical lighting on both sides should be used, and the road lighting width needs to exceed 15 meters.

Solar Street Lighting  Installation Design?

Different countries and regions have different geographic locations and latitudes. and we may set different battery capacities and solar panel sizes for the solar streetlights. When people install solar street lights someplace, on one side, the solar panel can face the sun directly, but on the other side, the solar panel can not face the sun, so if the solar panel can be adjustable, it will absorb more solar energy, which can maximize the conversion of solar energy while the lower quality solar led street light panel is fixed, causing low conversion rate of solar and the using areas are also limited, so when we design solar street light project, we need to confirm that the sun can face the solar panel on both side of the road

And we also need to consider the amount of traffic or activity in the area that needs illumination. For example, if solar street lights are installed on highways or airports, the traffic of people and vehicles is very busy and the lighting illuminations are relatively high. For example, especially on the highway, the client usually requires 100% 12 hours at night and last 3-4 rainy days. Conventional solar street lights can not meet the lighting requirements. then we need to consider enlarging the size of the solar panel and the capacity of the battery, another method is to increase the capacity of the solar street light battery and reduce the power of the LED.

When solar street lights are installed in parks and village roads, the traffic of people is not very busy, and the illumination requirements are not high. The government can consider using conventional solar street lights at this time in order to save costs and energy.

Conclusion

Before we start a solar street light project, we need to know the factors that affect the working solar power street light system, Like the width and lanes of the road, Lux level, working hours per day, local sunshine conditions, average continuous rainy days, and the highest or lowest environment temperature. With these conditions, a scientific and reasonable solar power system can be designed.