Solar LED Street Light

What is Solar LED Street Light

Solar LED street light is lighting fixture which is powered by solar energy. Solar LED street light consists of solar panel, rechargeable battery and LED light. Solar panel of solar LED street light can convert solar energy into electrical energy during the day and store it in rechargeable battery. At night, the rechargeable battery will provide power to the LED light so that the LED light can illuminate the road. Solar LED street light is often used in walkways, sidewalks, paths, neighborhood streets, rural roads, etc. 

The Advantage of Solar LED Street Light

Solar energy is a renewable energy source that can be converted to electricity through photovoltaic(PV) or concentrated solar energy(CPS). Solar LED street light directly uses photovoltaics to convert solar power into electricity. It can be independent of the public power grid, fully utilize solar energy for night lighting, so that it will save a lot of energy costs. Compared with traditional street light, solar LED street light require less maintenance which can reduce maintenance costs.

The Structure of Solar LED Street Light

Solar LED street light consists of three main parts:

Solar Panel

Solar panel is one of the most important parts of solar LED street light, because solar panels can convert solar energy into electricity that can be used by LED light.

The photoelectric conversion efficiency of solar panels is on average 15% to 18%. Two types of solar panels materials are usually used in solar LED street lights: mono-crystalline and polycrystalline. The conversion rate of mono-crystalline solar panel is much higher than polycrystalline solar panel.

There are also different combinations between solar panel and LED light which can divided into separated solar LED street light and integrated solar LED street lights.

The separated solar LED street light type is the most common combination. Solar panel and LED light need to be installed at different positions on the street light pole. With the continuous maturity of solar panel technology, the latest integrated combination has emerged, combining LED light and solar panel into one.

The advantage of the separated solar LED street light is that the LED light can achieve larger wattage because the solar panel can be made into different sizes according to power requirements. Meanwhile, the separately installed solar panel can adjust the inclination and direction according to the sunshine conditions in different regions to better absorb solar energy. And the integrated solar LED street light is smaller than the separated solar LED street light, which is easier to install, and more beautiful in appearance.

Yaham lighting has developed these two types of solar LED street light. Slim series solar LED street light is separated solar LED street light, with maximum 150lm/W light efficacy that can bright wide walkways. 10W/30W/60W can be optional. Edge series solar LED street light is integrated solar LED street light, with maximum 180lm/W light efficacy. 10W/20W can be optional.

Rechargeable Battery

The rechargeable battery will store the electricity generated by the solar panel during the day and power the LED light at night. The lifespan of rechargeable battery is very important for the life of the LED light, and the capacity of the battery will affect the standby time of the LED light. Solar LED street light typically use three types of batteries: gel cell deep cycle battery, lead acid battery and lithium-ion battery. Lithium-ion battery are popular because of its compact size.

The solar LED street light of Yaham lighting adopt LiFePO₄ rechargeable battery for longer lifespan and better performance.

LiFePO₄ battery has very stable discharge voltage. During discharge, the voltage remains close to 14~15V until the battery is exhausted. The important advantages of LiFePO₄ battery compared with other lithium-ion chemicals are thermal stability and chemical stability, which can greatly improve battery safety.

LED Light

Compared with traditional street light, LED light has higher light efficacy and lower energy consumption, which is very suitable to be powered by renewable energy source like solar energy.

The solar LED street light of Yaham lighting adopt NICHIA chip to guarantee the lifespan and light quality of the solar LED street light. The lifespan of NICHIA chip is more than 100,000 hours(TM-21 L₇₀) which can ensure providing stable and durable lighting.

Smart Solar LED Street Light

The intelligent functions of solar LED street light include intensity control and sensing, which can make the lighting fixture more suitable for user needs.

Intensity Control

Solar LED street light with auto intensity control can adjust brightness in different time during night automatically to reduce light pollution and light waste.

The lamp power and brightness can also be adjusted by remote control to meet different needs.

The Slim series solar LED street light from Yaham Lighting is equipped with auto intensity control which can automatically regulate the power based on the battery capacity to extend work hours.

Sensing

The solar LED street light can be turned on and off automatically by sensing, so as to realize the function of lighting when people come, and turn off when people leave.

The Edge series solar LED street light is equipped with PIR sensor to become smart.

Light Distribution

There are five basic light distributions for street lighting.

TYPE I

Two-way lateral light distribution. Usually used in walkways, sidewalks and paths.

TYPE II

Lateral light distribution, used in areas with large lighting, widely used on wide sidewalks, ramps and entrance roadways.

TYPE III

Lateral light distribution, widely used on parking lots and other areas that require a large lighting area.

TYPE IV

Semicircular light distribution, this light type LED street light is usually installed on the side of walls or buildings to light up the perimeter of parking areas and businesses.

TYPE V

Circular light distribution that has the same intensity at all angles, suitable for the central island of roads, road centers, intersections and large commercial parking lots.

Due to the smaller wattage of solar LED street light, the common light distribution is TYPE I and TYPE II.

Yaham Lighting is a professional solar street light supplier. We provide customers around the world with the most suitable solar energy solutions based on the local environment. Please feel free to contact us.