2022 Newest Solar Powered Street Light Buying Guide

Solar powered street lights are being placed everywhere the planet. Conventional street lights are gradually replaced. When people decide to install the solar power street light, it's hard. Will the solar light stay light on the night? How do I choose cost-effective solar powered street light? Read this 2022 newest solar power street light buying guide. You will know how to do it.

1. Choose top grade components

Solar cell

The main function of the solar panel is to convert solar light energy into electrical energy. This phenomenon is called the photovoltaic effect. There are three types of solar panels: monocrystalline silicon solar cells, polycrystalline silicon solar cells and amorphous silicon solar cells. The conversion efficiency of monocrystalline silicon solar panels is up to 23%, polycrystalline silicon is 15%, and amorphous silicon is less than 6%. Solar panels with high conversion efficiency will generate more power, and low conversion efficiency will generate less power. Therefore, before purchasing solar street lights, it is necessary to figure out the power requirements and purchase the corresponding solar panels.

Led light source

Under the same brightness, LED light source consumes only one tenth of incandescent lamp and one third of fluorescent lamp, but its life is 50 times that of incandescent lamp and 20 times that of fluorescent lamp. Leds is the fourth generation of lighting products after discharge lamps are also the latest energy-saving products on the market. Solar lighting products have the advantages of energy saving and environmental protection. Of course, the lamps should be energy-saving. The lifespan of the LED light source is more than 50000-100000 hours, DC, no inverter, convenient and safe.

Lamp shell

Most of the solar powered street lights on the market use the sand-finishing process to manufacture the outer shells. The quality of this lamp housing is not good. Solar street lamps with excellent performance usually use die-cast aluminum lamp shells. The lamp housing is manufactured by aluminum alloy stamping process, which has a high content of aluminum alloy and is durable.

Rechargeable battery

The function of the solar energy storage battery is to store the energy of the solar cell components as much as possible during the day. The selection of battery capacity generally follows the following principles: First, on the premise that it can meet the lighting at night, it must also be able to store the electrical energy that meets the lighting needs of continuous rainy days at night. The battery capacity is too small to meet the needs of night lighting or continuous use; the battery capacity is too large, and the solar panels can't provide sufficient charging current, the battery is often in a state of power loss, which affects the battery lifespan and causes waste at the same time .

There are mainly two types of solar energy storage batteries on the market: lithium-ion batteries and lead-acid batteries. Lead-acid batteries, as the name suggests, contain heavy metal lead, which poses a great threat to environmental pollution. Therefore, the lead-acid batteries used in solar street lamps on the market are gradually being replaced by lithium-ion batteries. Lithium-ion batteries are widely used due to their environmental protection, non-polluting, small size, large capacity, high safety performance, long life and other advantages, especially in the second generation of solar powered street lights, also called integrated solar street lights, which played a pivotal role in promoting.

Solar powered street light controller

Regardless of the size of the solar lamp, high performance charging and discharging control circuit is indispensable. In order to prolong the lifespan of the battery, its charging and discharging conditions must be restricted to prevent the battery from overcharging and deep discharge. In addition, because the input energy of the solar photovoltaic power generation system is extremely unstable, the control of the battery charging in the photovoltaic power generation system is more complicated than that of ordinary battery. For the design of solar lamps, success and failure often depend on the success and failure of the charge and discharge control circuit. Without high performance charge and discharge control circuit, it is impossible to have a good performance solar lamp.

2. Traffice on the road

Traffic on the road is one of the important factors that need to be considered. If there is not much traffic on the road, you can choose solar street lamp with PIR motion sensor. When a person or a car occured in the area, the street light system will be activated automatically. When there is nobody in the area, the street light will provide the minimum illumination. With PIR motion sensor, the street light can adjust the brightness depending on the traffic.  Solar street light are only activated at specific times , saving battery life.

3. Shade along the road

There are some roads with lush trees along the roadside. These lush trees may block the solar panels from absorbing sunlight. We know the electricity of the solar street lamp comes from the solar light. If the solar panel can't absorb enough solar light, it will affect the lighting efficiency of the street light. We all know that solar panels are composed of multiple strings of cells. If one string of cells is not exposed to sunlight for a long time, then this set of cells is equivalent to useless. If the solar powered street light is installed in a place, a certain area of the solar panel is blocked by a certain obstruction in that place. If this area is not exposed to sunlight for a long time, it will not be able to convert the sunlight into electricity. The batteries in that area It is also equivalent to a short circuit. The shaded solar cell will easily cause the hot spot effect, the shaded part will reduce the power generation, consume the electricity generated by other parts, and become a load. The hot spot effect can cause damage or even burnout of solar cell modules.