Four Chuan lighting up long-term adherence to the "sharing of resources, mutual benefit and common development", striving for one of the first western brand to build a green low-carbon clean energy !! !! Better Homes, the company has a strong technical design team, experienced manufacturing team, with standard production workshop, ISO mode of production management system. As the core technology to manage for the protection, to manufacture high quality products. Welcome to contact us, sincerely hope to work together with you, win-win cooperation, create brilliant! ! First, solar power and solar lights and solar lights ?? solar power compared with the general design of solar lighting, the same basic principle, but need to consider more aspects, mainly in the control system link. ?? Solar lighting system for the DC-based stand-alone PV systems. The solar cell module solar energy into electricity, control and protection by the controller, and electrical energy into chemical energy stored in the battery. When the electricity, then the battery chemical energy into electrical energy for the DC load use, or through an inverter to AC inverter for AC load. Only when the long absence of light so that the battery power runs out, the device stopped working. Because the battery storage capacity is limited, therefore, to ensure the long-term absence of light fixtures work, need to add power auxiliary systems. ?? Solar street consists of the following components: solar panels, solar controller, battery, light, light poles and lamp housing, and some also configure the inverter. Power auxiliary section are: power supply terminal, a relay switch board composition. ?? Solar panels are the core part of the solar lights, solar street lights is the highest part of the value. Its role is to convert solar radiation into electricity stored in batteries or fed. Among the more common solar cells and more practical monocrystalline silicon solar cells, three polycrystalline silicon solar cells and amorphous silicon solar cells. In too sunny, sunshine good Midwest, using polycrystalline silicon solar cells as well, because polycrystalline silicon solar cell production process is relatively simple, the price is lower than the single crystal. On rainy days more, relatively not very abundant sunlight southern region, the use of single crystal silicon solar cells as well as single crystal silicon solar cell performance parameters stable. Amorphous silicon solar cells outdoors under sunny insufficient better, because amorphous silicon solar cells on solar illumination conditions require relatively low. Silicon photoelectric conversion efficiency is 14% to 16%, the polycrystalline silicon is 10% to 12%. ?? Solar lighting system is the most important part is the controller, its performance directly affects the life of the system, especially the battery life. Controller industrial grade MCU master controller, by measuring the ambient temperature of the battery and solar module voltage, current and other parameters of the test to determine the control MOSFET device on and off, to achieve a variety of control and protection functions. No matter the size of solar lamps, a good performance of the charging and discharging controller is essential. To prolong battery life, it must charge and discharge conditions to limit, prevent battery overcharge and depth charge. In the large temperature difference, the controller should have qualified temperature compensation function. While solar street light controller should both control functions, with light control, time control function, and should have at night is automatically cut control load function, easy to extend the working hours street rainy days. Since the input of solar energy photovoltaic power generation system unstable, it is generally required to configure the battery system to work, generally lead-acid batteries, Ni-Cd batteries, Ni-H batteries. Choice of battery capacity subject to the following principles: First, to meet the night lighting under the premise of the energy as much as possible during the day a solar cell module storage down; we must also be able to meet the electrical energy storage consecutive rainy days night lighting needs. Battery capacity is too small can not meet the needs of lighting at night, excessive capacity, battery power is always in deficit state, affecting battery life, while wastage. The battery should match the solar cells, electrical load (lights) phase. A simple method can be used to determine the relationship between them. Solar power must be higher than the load power more than four times, the system to work properly. Solar battery voltage battery voltage to more than 19% to 30%, in order to ensure normal power transmission to the battery. Battery capacity must be higher than the load on the consumption of more than five times better. Solar street light is an important prerequisite in what is normally used in solar lighting. Solar lamps using low energy-saving lamps, low pressure sodium lamp, lamp, LED and other light sources. Wherein the low-voltage energy-saving lamp low power, high luminous efficiency, but life is 2000 hours, the lamp is easy to black, generally suitable for solar lawn lights, garden lights; low-pressure sodium lights high efficiency (up to 200Lm / w), subject to the inverter , a low pressure sodium expensive, making the whole system is high, use less; Promise lights high efficiency, can be used in ordinary mains conditions, but life is greatly reduced in solar lamps, because most inverter with PWM modulation technology power inverter, so the inverter output power frequency, term position, voltages are not comparable to ordinary electricity; LED light source, long life, low voltage, no inverter, high luminous efficiency, As technology advances, LED performance will be further enhanced. Thus, LED light source as solar street light will be a trend. ?? Layout and lighting poles should be chosen to meet the "city road lighting design standards" (CJJ45-2006) related requirement that fast road, trunk road average illumination 20 / 301x, evenness 0.35, branch average illuminance 8 / 101x, uniformity of 0.3. Since the small power LED for 30 ~ 100w, luminous efficiency 50 ~ 80Lm / W, to achieve lower average road illumination. Through testing, the rod 8.5 meters high, 30 meters distance between the light source 2 × 50WLED lamp, lamp illumination 19lx, two lights 11lx, darkest 3.5lx. More than the number of the newly installed lamp illumination initial value due to factors such as the light fades lighting conditions exist under long-term use, so it can only meet the sub-distributors, branch-related road illumination requirements, fast road, trunk road with caution. LED lights work the same time every day should be the general street work time, the design should consider winter sunshine time is short and the status of the lights for a long time, their working hours shall be 12 hours above. Because LED light influenced by the weather, such as the case of continuous rainy days make LED lamps lack of power can not be used. Countries are no specifications for LED lights to work in low irradiance (continuous rainy days) case, allows for a minimum working time does not make provision for lighting manufacturers and is now generally based on the local meteorological conditions, should be in the low irradiance (continuous rainy days) under the condition to work in 15 to 20 days. Should be fully considered in the design of solar panels and battery capacity.