What’s the Differences Between Monocrystalline solar panel and Polycrystalline solar panel ?

Solar street lamps usually use two kinds of solar panels, Monocrystalline solar panels, and polycrystalline solar panels. Silicon is the raw material for making solar cells, but it is not easy to extract it. Therefore, while producing monocrystalline solar cells, people also studied polycrystalline solar cells. So how do distinguish monocrystalline solar panels and polycrystalline solar panel correctly?

Firstly: Appearance differences

Looking from the appearance, the four corners of the monocrystalline solar cell are circular, and the surface is not patterned; while the four corners of the polycrystalline cell are square, and the surface is like an ice flower.


monocrystalline solar panel

                      Monocrystalline solar panel

polycrystalline solar panel.

                Polycrystalline solar panel


Secondly: Usage differences

For users, there is no big difference between monocrystalline solar panels and polycrystalline solar panels. Both of their life and stability are very good. Although the average conversion efficiency of monocrystalline silicon panels is about 1% higher than that of polycrystalline silicon panels, monocrystalline silicon panels can only be made into quasi-square (all sides are circular arcs), some areas of solar panels will not be filled when they are made up; while polycrystalline silicon is square, so there is no such a problem, their advantages, and disadvantages.

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Solar Street Light

Analysis On Street Light Electric Shock Caused By Heavy Rains

Every summer during the rainstorm season, news of casualties caused by street light electric shock accidents occurs. Most of the Electric Shock of Street Light caused by light electric leakage on rainy days. Due to the high temperature and humidity of street light facilities in summer, the cable insulation layer is easy to aging and breakdown, leading to electric leakage. In addition, thunderstorms Street light Leakage Accident occur frequently in summer, it forms water accumulation on roads, which immerses urban lighting facilities (such as cable wells, street light poles, etc.) in water and easily causes electric leakage accidents. The leakage of the street light pole may occur in the following ways.

led street lightstreet light

  • The poor quality construction causes leakage of lighting facilities.

Failure to comply with the standard construction or installation quality problems, such as screw damage to the insulation layer of street light cables during installation. In rainstorm days, when urban rainwater soaks live equipment, it will cause the connection equipment live. Leakage caused by rainwater immersion.

street light poles

  •   The aging and damage of the cable insulation layer in the lamp pole make the lamp pole live.

Some construction simply uses a tape winding method, the tape is easy to aging, it is likely to leak electricity.

  • The poor quality of lighting electrical appliances causes the lamp pole to be electrified.

In the design and construction of urban lighting engineering, strict checks should be made on the selection of lighting appliances, the selection of certified light sources, electrical appliances, lamps, and other products should be a priority.

  • Discharge of wiring terminals.

At present, most of the wiring connection modes are peeling and winding. This mode has high resistance, high current, short heating life of terminals, and will discharge when moisture or water is immersed.

  • The electricity of the lamp pole caused by man-made destruction.

It mainly refers to the cable which was stolen and damaged, cable fracture exposed to the lamp pole, and this easily leads to discharge accidents.

  • The harsh natural environment causes the lamp pole to be charged.

Because of thunderstorms, water overflowed the repair door holes, resulting in street light leakage. Or lightning strike on the lamp pole, because the lamp pole grounding is not good, resulting in burning electrical equipment so that the lamp pole around to be charged.

At present, more and more solar street lights used for roadway lighting, which completely solved the leakage accident. In addition to urban main roads, major facilities, buildings, large squares and other places such as secondary roads, residential roads, parking lots, parks, schools, hospitals, and so on, all of these places can consider the use of solar street lights. In addition, in some natural disaster-prone areas, such as flood areas and earthquake-prone areas, solar street lights are also a good choice because these disasters are easy to cause line damage and leakage.


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The Influence of Average Annual Sunshine And Total Solar Radiation Intensity In Africa For Solar Street Light

LUXMAN specializes in the production of solar LED street lights. Before each project is carried out, the customer’s environment and application will be investigated. Factors such as longitude and latitude, sunshine intensity, installation height of solar street light, installation location, estimated human flow, working hours per night, whether to accept intelligent dimming, etc. Will be considered and recommended. In this way, we can offer the best solutions, provide suitable products and fantastic services to our customers.

  1. Average Annual Sunshine in Africa

From a longitude and latitude point of view, Africa spans 30°N〜30°S. In average annual sunshine, the general trend is more in the north and south of Africa, and less in the middle. North of Sahara Desert, the annual sunshine is 3 000 ~ 3 500 hours. It’s lower in the central Africa, Gulf of Guinea and Congo Basin, at only 2 000 ~ 2 500 hours per year. It’s higher in the south of Africa, about 2 500 ~ 3 500 hours per year. Between 10° N ~ 10° S, the annual sunshine hours in the East are higher than in the West. For example, Somalia, Ethiopia and Kenya average 2 500 ~ 3 500 hours per year, while Liberia, southern Nigeria, Congo and Democratic Congo in the West average 2 000 ~ 2 500 hours per year.

Due to the control of the tropical continental Saharan air mass in northern Africa, the climate is dry and sunshine is abundant. The annual sunshine in Egypt, Algeria, Libya, Mauritania, Niger, northern Chad and Northern Sudan at 10°〜30°N is more than 3,000 hours. Western Africa is affected by the Equatorial Ocean Air Mass and it has less sunshine. From Sierra Leone to Central Africa and Democratic Congo, the annual sunshine is 2,000 to 2,500 hours. Affected by the dry northeast monsoon and the changeable southeast monsoon in East Africa, the climate is dry and sunshine is abundant throughout the year. From southern Sudan, Ethiopia, Somalia to northern Mozambique, the annual sunshine increases to 2 500 ~ 3 000 hours.

Southern Africa is controlled by the subtropical highs in the Atlantic and Pacific Oceans. It has  stable air, less rain and more hours of sunshine, especially on the West coast. It’s particularly obvious. Southern Zambia, Angola and Mozambique have relatively less sunshine than in the south, ranging from 2500 ~ 3 000 hours per year. In an area centered in Botswana, the annual sunshine is more than 3000 hours. At the east coast of South Africa, it’s about 2 500 hours per year.

  1. Annual Total Solar Radiation Intensity

The annual total solar radiation intensity is 6 300 ~ 6 700 MJ/m2 in the Mediterranean coast of Africa. With Sahara as the center extending eastward to Sudan, Ethiopia, Somalia and Eastern Kenya, and Northern Tanzania, it’s about 7 500 ~ 8 400 MJ/m2. From the Gulf of Guinea in West Africa to Congo and Zaire, it’s about 5 800 ~ 6 700 MJ/m2. The rest of Africa is mostly at 6 700 ~ 7 500 MJ/m2.


Application of Solar Street Light USA in Natural Disasters

Key words: solar street lights us, hurricanes, rainstorms, floods, earthquakes, etc.

According to the U.S. World Daily, the weather forecast pointed out that Oklahoma and Arkansas were affected by the latest storm on the 27th, possibly the worst flooding in history. In Arkansas, the river water level has risen sharply and is on the verge of flooding.

In Tulsa, Oklahoma, the Army National Guard stepped up patrols on the dikes that were in danger. Tulsa Mayor G.T. Bynum said on the 27th that the levees are still normal, but the situation may change at any time. “We call on everyone to prepare for the worst floods in history.” Billam said people living near the embankment should evacuate early, and the city government has set up a number of shelters.

everlasting lampnatural disaster

Every year, floods hit the Midwest and Great Plains. Over the past 30 years, the federal government and local governments had invested about $5 billion in flood prevention budgets. Over the past 10 years, costs have increased gradually, as several densely populated areas, including Texas, New York and New Jersey, have been hit hard by storms. The central and western regions have suffered from the devastating storms. Strong winds and floods have left the disaster areas devastated.

earth quake lightluxman solar street light

Natural disasters such as tornadoes, storms, floods and earthquakes directly damage power grid-related equipment, including tower inversion, disconnection and substation primary equipment damage. And these all directly lead to large-scale blackouts, which mean that there is no network, communication, etc. LUXMAN Solar Street Light Manufacturer provides Integrated Solar Street Lamps to solve several problems effectively: 1. Night lighting, 2. Small energy storage system, 3. 24-hour monitoring.


  1. Night Lighting

Lighting time:12hours per night + 365 days + 3-5 years service life

Turn on the lights 12 hours per night, turn on the lights automatically at dark and turn off the lights automatically at daybreak (we set 10-15 lux automatic induction)

Lighting mode of LUXMAN Integrated Led Solar Street Light: PIR , Timer or PIR+ Timer control

PIR control is the infrared motion detecting mode of the lighting unit. When activated, 100% of the lights turn on. after 25 seconds, the system returns to normal operation with 30% of the lights operating.

Timer control instant control mode, factory standard settings: 1 hour@70% +2 hours@100% +2 hours@50%  +7 hours@30%

PIR + Timer control + hybrid mode: 2 hours@100% +3 hours@70% +7 hours PIR operation (induction 60% + 25 seconds later change 30%, no induction 30%)


Efficient Monocrystal solar panels plus lithium iron phosphate batteries enable our lights to be turned on for 12 hours every night, and support 5-7 continuous rainy and cloudy days. In this way, LUXMAN Solar Street Light can provide illumination whenever needed, every night of the year and they can work continuously for 3-5 years.

Key words: Solar Street Light In USA —– night light everlasting lamp

  1. Small energy storage system

As a solar street lamp for lighting, LUXMAN Solar Street Light fully realizes the product potential and provides additional value to customers. LUXMAN Solar Street light manufacturer provides integrated solar lighting that also features USB interface and charging of mobile phones, IPADs, etc. in an emergency. In a disaster, we can solve the urgent need for reliable off grid lighting.

Key word:LUXMAN Solar Light —USB interface

  1. 24-hour monitoring.

Another potentiality of Solar Street Light with cctv is with camera for surveillance. Part of the integrated LUXMAN solar light with Camera can be automatically monitored 24 hours a day to provide additional guardianship for your family.

solar street light with camerasolar street light with cctvsolar street light with USB

Although natural disasters can be ruthless, flooding houses, destroying homes and making you homeless, LUXMAN’s Solar Street Lights will still stand alone at home, providing you with communication power and lighting up every difficult night.

LUXMAN Solar Street Light manufacturer devotes itself to product research and development, expands product potential, cares for customers, and provides customers with high quality and cost-effective products.

Choosing LUXMAN will not only provides reliable guarantee for your customers, but also brings long-term benefits to your business.

solar battery manufacturer in china

Lithium iron phosphate batteries (LiFePO4 battery) or Ternary lithium battery ?

How to choose a solar street light battery?

As we all know, more and more people are buying integrated solar street lights, and one of the keys points of the Solar Street Light quality is the selection of solar street light batteries. Usually, we use Ternary Lithium batteries or LiFePO4 batteries. Let’s compare the difference between the two.

First of all, why we use lithium batteries?

Lithium batteries (Li-ion, Lithium Battery): Lithium batteries are widely used because of their advantages of a lightweight, large capacity and no memory effect. The energy density of lithium batteries is very high, and their capacity is 1.5-2 times that of Ni-MH batteries of the same weight. (SYLVANIA solar street lamps adopted Ni-MH batteries) Lithium also has a low self-discharge rate. In addition, lithium batteries have few “memory effects” and no toxic substances, which are also important reasons for their wide application.

32700 battery

Ternary Lithium batteries and LiFePO4 batteries are the two main types of Lithium Batteries that are used for Solar lighting products.

Ternary lithium battery Vs lithium iron phosphate battery

I:  The material system of a LiFePO4 battery and a ternary Lithium battery is different.

II:  A LiFePO4 battery is a 3.2V voltage platform, with a cycle life of more than 2000 charges.

III:  The ternary lithium battery is a 3.7V voltage platform, and the cycle life depends on different manufacturers, different models, and processes, and generally, it is 500-800 charge cycles.

IV:  LiFePO4 batteries offer better high-temperature performance, while ternary lithium batteries have better low-temperature performance.

V:  LiFePO4 solar street light batteries are safer.

Further analysis of the two kinds of lithium batteries,

LiFePO4 batteries are characterized by high safety, high rate charge-discharge characteristics and long cycle life. The battery capacity is 80% of the initial capacity after 1600 cycles when the charging condition is 1C multiple charging to 3.65V, then the constant voltage is changed to 0.02C, and then the discharge voltage is 2.0V at 1C multiple charging to 2.0V cut-off voltage. LiFePO4 batteries also have stable charge-discharge characteristics and good fast charge characteristics. In addition to its long life and excellent charge-discharge performance, the greatest advantage of LiFePO4 batteries is their safety. The chemical properties of liFePO4 batteries are stable and the high-temperature stability is good. The LiFePO4 batteries begin to decompose at 700-800 C, and will not release oxygen molecules in the face of impact, needling, short circuit, and so on. It will not produce intense combustion and has high safety performance

32700 battery cell

The disadvantage of a LiFePO4 battery is that its performance is greatly affected by temperature, especially in a low-temperature environment, where the discharge capacity and capacity will be greatly reduced. In addition, there are some performance defects in lithium iron phosphate. The energy density of the battery is low, only the weight energy density of the battery is 120Wh/kg. If the energy density of the whole stack, including the battery management system, heat dissipation, and other components is calculated, it will be lower. The cost of material preparation and the cost of battery manufacturing are higher, the yield of the battery is low and the consistency is poor. The cost per pack is higher than that of ternary lithium batteries

Ternary lithium batteries refer to lithium batteries containing transition metal lithium-intercalated oxides containing nickel, cobalt and manganese, which can be expressed as LiMnxNiyCo1-x-yO2 (0 < x < 0.5, 0 < y < 0.5). This material combines the advantages of lithium cobalt oxide, lithium nickel oxide, and lithium manganate, and forms a ternary synergistic effect of three materials, whose comprehensive properties are superior to any single combination compound. Weight energy density can reach 200Wh/kg

The safety of ternary lithium batteries is poor. The thermal stability of ternary lithium batteries is poor. They will decompose at 250-300C. When it encounters flammable electrolytes and carbon materials, decomposition will start at a point. The heat generated will further intensify the decomposition of the positive pole, and it will deflagrate in a very short time. In a car accident, the impact of external force can damage the battery diaphragm, which will lead to a short circuit, and the heat generated during the short circuit will cause the thermal temperature to rapidly rise to more than 300 C, creating the risk of spontaneous combustion. Therefore, for ternary lithium batteries, the battery management system and heat dissipation system are very important.

From the solar street light battery knowledge above, you can know whether the light purchased is a high or low-quality version.

If you purchase Integrated solar LED street lamps only marked “Lithium battery”, you have to know it uses LiFePO4 batteries or other Lithium batteries. Most of the time it will be ternary Lithium batteries. If it is ternary lithium power, do not expect a five-year service life guarantee.


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solar street light real estate

4 Applications of Solar Lights in American Real Estate (2)

Regarding lighting system for house, there are 4 typical applications of solar lights in current American Real Estate industry, which has plenty of experience with consideration of lighting needs and landscape requirement.


So now let’s take a look at how solar street lights are applied in the real estate industry.

Typical Solar Lights Applications


1. Outdoor Application: Pathway Lights


Match the architectural lines of the house is part of the things that shall be considered in the landscape. The outdoor solar lights can be installed along public road or pathway on your yard, and your own lawn, etc.


Installation on the side of public road may benefit visitors. On the other hand, installation in private walkways can improve safety and protection of the house and people inside. Yard lights are so important in such case.


They can be illuminated for 12 hours every night, 365 days a year with a minimum 3-5 years of guarantee for a reliable long-term lighting experience. It is recommended to use PIR control, power between 20W-40W and illumination 2000lm-5000lm. It’s more practical and cost-effective.

solar garden street light

2. Garden Application: Front Courtyard Lawn Lights


The lawn in front of a house might have a landscaped environment, aiding in absorption of air contaminants like dust or harmful gases, purification of air, elimination of noise, prevention of soil erosion and so on. It is recommended to use solar lighting products with monitoring function. The recommended power is 30W -60W.


The lawn in front of a house sometimes functions as a landscape. Moreover, it helps aiding in absorption of air contaminants like dust or harmful gases, purification of air, elimination of noise, prevention of soil erosion and so on. It is recommended to use solar lighting products with monitoring function. The recommended power is 30W -60W.


There is a type of outdoor solar garden light with camera built-in. Obviously, this type increases the safeness of house tremendously.

solar street lighting

3. Outdoor Application: Swimming Pool Lights


Many American houses and residential communities have swimming pools. Family gatherings, and recreational activities are often hold near a pool, therefore, the outdoor light and security of the swimming pool is especially important.


It is recommended to use 20W-40W solar street lights. It is recommended to use outdoor solar lights with cameras around a swimming pool where little kids, animals or drunk people might have a chance to fall in and drown.


A motion sensor embedded monitor record tool helps in some cases.

solar street lighting

4. Outdoor Application: Garage Door Lights


The garage is almost indispensable for every American family. The garage is not only large in space but also has a wide variety of uses. Many startup companies in the United States need such a space which contains various tools and resources. Many well-known technology companies in history have been born in the garage. Apple is the most famous one. That is called “garage culture” as we all known.


It is recommended to use 20W-50W or 30W-60W yard solar lights with monitoring. Car theft surveillance is necessary always.



After reading the above 4 typical applications of solar lights in American Real Estate industry, you might probably have much more clear ideas to implement installation for different type of house.

Almost all area mentioned above needs camera surveillance and we are pleased to be able to provide you with our suitable type of product.


To know more about us and product, please check our web site or click the link directly https://luxmanlight.com/

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real estate solar light

Application of Solar Street Lights in American Real Estate (1)


In recent years, more and more real estate companies in the United States use integrated solar real estate light to replace traditional street lights or AC-powered LED lights. According to the comparison data, the annual growth rate of LED street lamp (AC-based) is 30%, and that of solar street lamp is more than 50%.

In the early summer evening, the Aaron family finished their dinner and sat by the backyard swimming pool. A round coffee table with Coca-Cola, Budweiser beer, an IPAD and a LUXMAN lighting remote control was surrounded by their wicker chairs. When the sky had just fallen under the cover of darkness, a cluster of white light suddenly lit up and illuminated most of the courtyard. Everyone’s spirit was bright, everyone was excited, saying that they wanted to swim, to play water polo, to play games… The daytime’s fatigue faded and the night life began. It’s LUXMAN who is bringing this light and creating interest in evening activities with integrated solar  lights which utilize the energy storage system of combined solar energy and lithium batteries to power LEDs, for 12 hours of lighting, every night, 365 days a year, without need for replacement for a minimum of 3-5 years.

real estate solar light

Why do more and more real estate developers choose to use solar lighting products?

First, let us understand the advantages of integrated solar street lights. Solar street lights, solar garden lights and other series of outdoor lights are based on the sun’s power which is charging the battery during the daytime and supplying the lighting through LED lamps at night. There is no need to dig trenches to damage the road and no complicated and expensive pipeline cables required during the installation. It can be installed independently and has wide adjustability in the layout of the lamps. It is environmentally friendly, secure and energy-saving. The charging and on/off switch uses intelligent control which is automatic (no manual operation), stable and reliable.

Second, when installed with solar garden lights, solar street lights, solar warning lights, it can not only improve the value of the residential community. It can also make the overall environment more beautiful and also reflect sincere environmental awareness.

Third, when potential buyers of residences come to visit and see the community equipped with environmentally friendly and energy-saving solar energy street lights and, garden lights, they will have a better impression of the community. Accordingly, the installation of solar lights can increase the selling points of the community and facilitate sales.

At present, the United States and the whole world are facing a tough environment and energy problem. The harmful gases and wastes generated by the most common fossil fuel energy sources today are shocking to the atmosphere, water and living environment. The more energy consumption, the more pollution is generated. Solar energy is non-hazardous and non-polluting. It is a true zero-emission environmentally friendly energy source. Solar energy is also an environmentally friendly new energy source encouraged by the United States. It is clean, environmentally friendly and does not consume conventional energy. All those advantages push LUXMAN forward in the development and production of integrated solar lighting. The lithium solar energy storage control system developed and produced by LUXMAN Company can be perfectly matched with various series of solar integrated lights, solar semi-split lights, lithium battery security (lighting), solar garden lights, parking lot lighting, farm lighting and mining industry lighting etc., and can also provide an overall solution for lithium solar lighting and smart lighting. The lithium solar energy storage and control system can ensure that the lithium solar street lights are operational overnight in even the tough environment of more than 7 days of rain and minus 20 degrees centigrade (-4 Fahrenheit).

Therefore, we see that large companies such as Horton, Pulte Homes, Centex, Lennar, etc are more inclined to install integrated solar street lights for house or community roads.


expo 2019


EXPO 2019

We invite you to visit us at the EXPO 2019 Electrica International in Mexico City from 04. – 06. June 2019 at Booth 1130.
Look forward to discussing you all the related topics in the field of Solar Street lighting.
Luxman will confirm one company as our mutual benefit and long term business partner in Mexico during this trade fair.
expo electrica internacional
solar trade fair
Please contact us for more information about solar street lighting and trade fair information.
To register:  [email protected]