solar street light real estate

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

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In the previous section, we analyzed why solar street lights were installed and used in the US real estate industry.

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

Application

First: The roadside in front of housing. Installed along public roads or on your own lawn, trails, etc. Installed on the side of public roads to benefit others; privately owned land and trails to ensure environmental protection and safety. They can be illuminated for 12 hours every night, 365 days a year with a minimum 3-5 years of reliable long-term lighting. 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

Second: The front lawn. 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.

solar street lighting

Three: Near a swimming pool. Many of America’s houses and residential communities have swimming pools. Many family gatherings, rest and recreational activities are near a pool, so the outdoor lighting and security of the swimming pool is especially important. It is recommended to use 20W-40W solar street lights. It is recommended to use cameras around a swimming pool where little kids, animals or drunk people might fall in and drown.

solar street lighting

Four: Near the garage door. 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 start up companies in the United States need such a space and need various tools. Many well-known technology companies in history have been born in the garage, so they have a “garage culture”. It is recommended to use 20W-50W or 30W-60W solar street lights with monitoring.

To know more about us, please check https://luxmanlight.com/

solar battery manufacturer in china

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

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As we all know, more and more people are buying integrated solar street lights, and one of the keys point of the Solar Street Light quality is the selection of lithium battery packs. 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 light weight, 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 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.

solarstreetlightbattery lithiumbattery

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 is 500-800 charges.

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

V:  LiFePO4 batteries are safer.

Further analysis about 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 long life and excellent charge-discharge performance, the greatest advantage of LiFePO4 batteries is its 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

The disadvantage of LiFePO4 battery is that its performance is greatly affected by temperature, especially in low a 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, th

e impact of external force can damage the battery diaphragm, which will lead to short circuit, and the heat generated during 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 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.