Service life of solar street lights
Give you some suggestions:
The purchase of solar street lights mainly focuses on the life, brightness and number of days of continuous lighting in continuous rainy days of the solar street light system.
1. First, consider the life of the whole lamp. There are several factors:
1. The life of LED constant current drive device:
In fact, the solar street lamps produced by LED solar street lamp manufacturers use DC power supply, with low voltage and high current. Every component is very critical, as small as the internal resistance of a joint and the resistivity of the wire. Of course, it has been proved in actual use that the main reason affecting the life of solar street lamps is the life of the lithium battery and the driving circuit of the LED light source.
The lifespan of LED lamp beads is 50,000-100,000 hours, but there is an electronic component electrolytic capacitor in the LED driver constant current source of conventional technology. The service life of the electrolytic capacitor is generally 3-5 years, and the electrolytic capacitor can only be guaranteed for 5 years. , which determines the life of the LED driver, the solar street lamp booster constant current all-in-one machine independently developed by the solar street lamp manufacturer. Industrial-grade chip, self-developed software program and development system, with light control + time control + constant current, adjustable power in three periods, morning light can be set, efficiency 96%, fully waterproof design, support automatic power reduction, design life 10 Year. It does not require electrolytic capacitors, so it is not limited by its lifespan. The lifespan of LED lamp beads, controllers and solar panels is basically the same, and the main materials are semiconductors.
2. Another factor is that the use of iron phosphate batteries has a longer life. Solar street lights generally use lead-acid energy storage batteries. Conventional technology can achieve a service life of 3-5 years, which is already very good. Our company uses lithium iron phosphate batteries The technology can last for 8-10 years, including self-produced polar plates. reliable quality. The life of the battery is mainly affected by the number of deep cycles and the working environment. Solar street lights save energy by 70-85% on the basis of other ordinary solar LED street lights, which greatly prolongs the cycle of the battery deep cycle once, thereby prolonging the life; The temperature of the working environment has a great impact on the life. Our company applies Japanese nano-glue technology to the battery to achieve breathable, waterproof, heat preservation and heat dissipation, so that the working temperature of the battery is 20-25 degrees Celsius, while most solar street lights with conventional technology use batteries Hanging on a light pole or on the ground (because there is no waterproof design), it is conceivable that in hot summer, the battery life will be reduced by half for every 10 degrees Celsius increase in temperature.
Second, secondly consider the brightness of the whole lamp;
Solar street lights do not mean that the power of the light source is better. Many manufacturers falsely report the power, or purchase low-lumen lamp beads to reduce costs. In fact, to achieve the same brightness, the lower the power of the light source, the better, which means saving electricity. The luminous efficiency of other companies' LED light sources is 80-100Lm/W, and the light decay is high, and the light decay reaches 15%-30% in one year, while our LED light source uses high-quality American Bridgelux chips. And using low light attenuation structure and technology, the luminous efficiency reaches 130-140Lm/W, and the light attenuation is less than 4% after 10,000 hours. After testing, the actual light attenuation is only about 2-3%, and our LED lamp beads themselves directly emit rectangular light spots , to distribute all the light evenly on the road, greatly improving the light source utilization efficiency and average illuminance, while the light spots emitted by other companies' LED light sources are all circular or imaged by lenses (the loss of brightness is also nearly 10-20%), causing light waste.
Then you should consider the number of bright days against long-term rainy days. At present, most solar street lights can only achieve continuous rainy days for only 3-7 days, which is far from meeting the requirements of climate change around the world because of continuous rainy days in most areas. The number of days is more than 3-7 days, and our solar street lights can reach 3-5 times that of conventional technology with the same configuration, and the lights can be continuously turned on for up to 35 consecutive rainy days. Why is this? The solar street light controller we use can make the solar LED street light save energy by 70-85%, that is to say, the power consumption of our solar street light is only 20% of that of the conventional solar LED street light with the same configuration, that is, 1 /5, if we can achieve 6 days of cloudy and rainy weather through conventional technology, we can have nearly 30 consecutive days of cloudy and rainy days. Many people may ask me how I did it?
The principle is as follows:
A: The LED light source of solar street light adopts digital drive technology to save 20% of electricity than conventional technology,
Most of the light sources used in current solar street lights use LEDs, and LED lighting requires an LED-driven constant current source. Conventional constant current sources need to consume about 20% of the power of the entire lamp, and we use LED digital constant current source drive technology. The power of this digital constant current source is only 0.0625(IC)W, which is almost negligible, so that the power consumption of solar street lights can be saved by nearly 20%.
B: LED digital constant current source drive, achieve intermittent power supply, saving nearly 50% of electricity,
Conventional solar LED street lights must continuously and constantly supply power to the lamp beads, while our LED digital constant current source uses intermittent switching to supply power to the LED light source. LED is a light-emitting diode, which is a semiconductor device. The characteristic of semiconductor is the switching characteristic. It is different from ordinary light sources. It has too many switches and is easy to be burned and damaged. If the power-on time of each switch on the lamp bead is consistent with the power-off time The design switching frequency is 10K-100KHz, and half of the time per unit time uses electricity and half of the time does not use electricity, which immediately saves 50% of our solar street lights. After testing, the actual energy saving is more than 47.3%. The temperature rise and light decay of lamps are 30-40% lower than conventional constant current technology. The extremely short switching time cannot be sensed by human eyes and analog lux meters.
C. The gradual energy-saving mode of the LED light source in the second half of the night can save energy by more than 15%;
In the second half of the night, the number of pedestrians and vehicles on the road will be greatly reduced, so you can set an energy-saving mode in the second half of the night. Through intelligent control technology, the power of the LED light source will be slowly reduced to the power you want, and then maintained until dawn, while others The company's street light controller suddenly drops to a target value, which is not good for pedestrians and vehicles; generally, our design is to save about 15% energy in the second half of the night, and there is still enough brightness.
In short: only energy saving, the corresponding configuration will be smaller than the actual one. Only in this way can we save solar energy, let customers buy good things, and save money. All components of our solar street light products are produced independently, and the system compatibility is good. We promise that with the same brightness, our solar street lights have 2-3 times longer lifespan and resistance to rainy weather. With the same configuration, our lights are nearly 2.3 times brighter than conventional technology. The life of each component is consistent, and the life of the whole light Long, the resistance to continuous rainy days can reach more than 365 days. Really realize the lighting all year round.
