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  • How long can a solar street lamp be used in rural areas
    How long can a solar street lamp be used in rural areas 2017-12-16

    The state to support new energy, many parts of the country are installed solar street lights, a solar street lights can be used for how long, this is a lot of beneficiaries are most concerned about. Life and solar panels, solar controller, LED light source, the battery, the following I have to analyze the impact of solar street lights use of these factors: 1.The life of solar panels generally up to 25 years, as long as you are a regular solar panel out of the product, the life of the poles can reach more than 30 years, the use of such a long life parts, can not be considered. 2.Solar street light controller technology is now more mature, not easily broken, as long as the correct use of the instructions, will not cause much threat. Even if the failure, the price is relatively cheap, many manufacturers are common, easy ordering, maintenance is also simple. 3.LED light source and battery life, battery life, manufacturers generally promised to 3 to 5 years, but if the overall system configuration is too small, the street lights are always used in a state of loss, so that the battery will be very fast , That is, the impact of the battery life. Some may have 2 to 3 years have to be replaced once. Usually we use the battery, it is necessary to take into account the daily solar panels charge, but also consider the daily power consumption of light, rainy days, the general we have to set aside 3 to 5 days of rainy days, so lights Generally will be more normal. Solar street lamp life is related to the initial system configuration, do not blindly save costs, configuration is too low. At the same time,related to solar controllers, solar panels, batteries, LED light source of the quality, try to choose the regulate manufacturers products.

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  • How to choose solar panel specifications for solar street project
    How to choose solar panel specifications for solar street project 2017-12-16

    In a solar street lamp system, the solar panel specifications determines the quality of the street light directly. Some of the common street lamp failure, such as lack of lighting time, charging abnormalities, and even solar street lamp system damage are related with the specifications of solar panels. Here's how to choose the solar panel specifications for analysis: 1. Solar panels must choose the correct open circuit voltage and operating voltage If you choose the PWM solar charge controller, to 12 V storage charge, the open circuit voltage is generally about 20V, the operating voltage is generally 17.5V. If the 24V battery charge, open circuit voltage and operating voltage of 12V twice. If the MPPT solar controller is selected, the open circuit voltage of the solar panel can not exceed the maximum input voltage of the controller. 2. Solar panel power selection Solar panel power selection, according to the following company calculations: P = Q * h / U * ξ1 / ξ2 / ξ3 * Vp Description: Q-- load power H - load day use time U - system voltage ξ1 - the number of integrated solar system, take 1.05 ξ2 - control circuit efficiency, take 0.85 ξ3 - battery charge and discharge efficiency, take 0.85 Vp - solar panel voltage. 3. Solar panel types, Single crystal and Polycrystalline Single crystal solar panels more efficient, light fades smaller, but the price a little more expensive Polycrystalline solar panels relatively low efficiency, but the price is cheap 4. Solar panel dimensions Dimensions has a lot of size, which size is more appropriate, this is determined by their own street lighting installation environment, in general, the same power, choose a smaller size is more appropriate. 5 other manufacturing processes Including the thickness of the aluminum frame, the transparency of glass, sealant is uniform, packaging and transportation

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  • UK Solar Energy Situation
    UK Solar Energy Situation 2017-11-04

    UK solar energy situation Britain wants to reach the EU goal and gradually shut down coal-fired power plants, it is getting more and more energy from renewable sources, such as wind and solar energy. In addition to solar energy, nuclear energy accounts for 23% of the total electricity generation in the UK, 30% of natural gas, and 1.4% of thermal power.  There are also wind power, hydropower, biofuel power generation. However, environmentalists complained of cuts in government subsidies decision of the solar power industry. Hanna Martin, director of the Hannah project in the UK, pointed out: "because of the low cost of solar energy and high power generation, the global solar energy industry is constantly updating the power generation record of Greenpeace.".  In 2016, the proportion of thermal power generation in the UK dropped from 23% in 2015 to 9% in the year; the British government hopes to shut down all thermal power plants by 2025.

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  • What factors need to be considered for choosing a solar street light controller
    What factors need to be considered for choosing a solar street light controller 2017-11-02

    With the development of national new energy strategy, solar street lights are more and more applications, widely used in rural areas, scenic spots and other applications. There are a wide variety of solar street light controllers in the market. What factors need to be considered for choosing a solar street light controller? 1. The output type of the controller. Currently ,the solar street light controller output voltage in the market is generally divided into three categories:Step-up constant-current controller with LED lamp driver, general output controller, step-down constant current controller with LED driver. which one to choose, according to the user to use the LED light type to determine. If the LED lights without a drive, you must select the controller with LED light drive, according to the number of LE lamp beads arranged to select the boost or buck type of solar charge and discharge controller. If the LED lights with drive, you only need the normal output of the controller. Note: The normal output of the controller that means the controller output voltage is equal to the battery voltage. 2. The voltage of the battery. The current solar street lamp battery voltage is generally divided into 12V or 24V. General low-power LED lights to choose 12V battery (<50W), the high power of the street lights to choose 24V, which can effectively reduce the line loss, of course, the battery voltage specifications also with the solar panel and load a relationship. If the solar panels and LED lights have been identified, then the battery specifications must also be suitable for their specifications. 3. If the solar street light controller load mode is able to meet customer design requirements. Now the street lamp controller operating mode are generally: pure light control, light control + time control, manual mode. Different controllers have some differences and must be carefully confirmed. 4. Maximum load output power You must confirm that the user's LED power can not exceed the maximum output power of the controller. Power is too large to cause overload protection or overheating 5. Street lamp work mode settings,. Generally set the button or infrared remote control settings, according to the user's actual requests to choose 6.Appearance requirements. Street lamp controller installed in the outdoors, and is all-weather work, must have a moisture, water, corrosion resistance, the current mainstream aluminum alloy shell, the internal perfusion treatment.

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  •  Is There A Radiation In The Solar Home System
    Is There A Radiation In The Solar Home System 2017-09-26

    With the popularity of photovoltaic, there are many people want to know: the roof installed so many PV modules, inverter output so much current, there is no electromagnetic radiation, the human body and home appliances have no effect? What is electromagnetic radiation What is radiation? It refers to the object in the form of waves or particles to the surrounding space to launch energy process. All the objects in nature as long as the temperature above absolute zero, will be in the form of electromagnetic waves or particles kept to the outside world to send energy, in other words, the world has radiation, including the body itself, all the time in the outward radiation , Such as the sun, in fact, is to accept the sun's radiation. However, not all of the radiation is harmful, and some even inseparable from it, such as the sun's radiation - the sun, the earth's growth needs all the sun. Although the electromagnetic radiation does not change the molecular nature of the organism, causing direct damage, but if the energy is large, will also have a certain impact on the organism, reflected in two aspects: thermal effects and induced current. Household equipment can also cause interference, such as cell phones, radios and televisions. The generation of electromagnetic radiation According to the basic theory of electromagnetism, there will be a corresponding electric field distribution around the charged particles. The charged particles will change with time. If there is a potential difference between the two points with different potentials around the charged particles, Voltage; when a large number of charged particles move when the formation of the current, the current around the magnetic field, with the time of the current will change the magnetic field. Similarly, the time-varying magnetic field can also produce electric field, so that changes in the electric field and the magnetic field alternately generated, perpendicular to each other and continue to spread to the space, resulting in electromagnetic radiation. Electromagnetic radiation carried by the size of the energy depends on the frequency of the high and low frequency, the greater the energy. Electromagnetic radiation of photovoltaic systems PV system is composed of photovoltaic modules, brackets, DC cables, inverters, AC cables, power distribution cabinets, transformers and other components, which stent is not charged, naturally does not produce electromagnetic interference. PV modules and DC cables, which are DC current, the direction does not change, can only produce electric field, can not produce magnetic field. Although the output transformer is AC, but the frequency is very low, only 50Hz, the resulting magnetic field is very low. Inverter is the DC power into the AC equipment, which has a power electronic transformation, the frequency is generally 5-20KHz, it will produce alternating electric field, it will also produce electromagnetic radiation. The state has strict standards for elec...

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  • Factors Affecting the Service Life of Solar Street Lamp Controllers
    Factors Affecting the Service Life of Solar Street Lamp Controllers 2017-10-17

    Solar street lamp controller warranty period is how long, the design life is how long, which is a lot of the purchase of the controller of the technical staff and procurement staff are most concerned about one of the problems, then the solar street lamp controller by which the life The impact of it, and now I am one by one analysis: A: The choice of controller components related Components to choose the preferred solar controller to determine the service life, some manufacturers in order to save costs, choose some of the lack of precision, poor resistance components, Month, as many as six months, component performance failure, the controller or no high and low voltage protection, or can not normally detect the voltage, resulting in street lights can not work, serious damage to the battery. Second: the controller of the processing technology Some small workshops using manual plug-in, man-made easily lead to errors, some resistance plug in, some capacitors inserted wrong. Affecting the life of solar street light controller. Anhui JNGE Power uses all-chip technology, machine operation, to reduce the artificial bad. Three: waterproof level Solar street light controller is generally installed in the outdoors, 365 days of uninterrupted work, the use of the environment is very bad, if not all waterproof, or installed in a waterproof box, over time, it is easy to cause short-circuit internal electronic components. Cause bad. Anhui JNGE Power solar controller with full glue technology, waterproof rating IP68. Can adapt to any harsh working environment.

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