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When you decide to purchase solar lights from the manufacturer, you must know the manufacturer at least 4 aspects.
Below I will give examples of the most common solar floodlights on the market.
size. As mentioned earlier, the size of the solar panel will depend on the intensity of the light and what material the panel is made of. Single crystal/polycrystalline silicon solar panels and thin film solar panels produce the same amount of energy and require less area. Therefore, before purchasing solar lamps, you should consider not only whether there is enough sunlight during the day in the installed area, but also whether there are enough physical areas to install the solar panels (if you want to use high-power floodlights).
Shell material and production processOutdoor floodlights must be properly water- and dust-proof, and can withstand the wind, sun and rain under any conditions throughout the year.
After determining the material of the lamp body for the manufacturer, another important indicator is to determine the size of the lamp body. Do not ask the wattage of the lamp. The important thing is to say 3 times! ! ! Never ask the wattage of the lamp! Never ask the wattage of the lamp! Never ask the wattage of the lamp!
The motion sensor is responsible for detecting motion within a certain range around the floodlight and turning it on when motion is detected. The three most common types of motion detectors are active sensors (which detect motion by transmitting microwaves and monitor changes in wave response time), passive infrared sensors or PIR (detecting motion by scanning infrared thermal changes in the monitored area) and combined sensors. In fact, all solar sensors with motion sensing use PIR sensors to detect motion because they are easy to adjust and do not pick up the movement of random objects such as branches or wind blowers that are common outdoors.
The function of detecting range, distance, delay time and light sensitivity. The range and distance settings determine the angle at which motion can be detected. Most motion sensors allow motion to be detected at 180 degrees around the sensor, while some special sensors can even detect 360 degree angle motion. The distance allows the adjustment detector to receive the distance of motion. The delay or detection time setting determines the amount of time that illumination will illuminate after motion is detected. The light sensitivity setting determines the brightness required for the sensor to begin picking up motion. Most motion sensing (or radar-sensing solar projectors can capture motion at 120-180 degrees wide angle and approximately 8-10M long distances).
type of battery. There are currently four different types of rechargeable batteries on the market for solar lamps - lithium phosphate (Lifepo4), lead acid, metal hydride nickel (nickel hydrogen) and cadmium nickel (nickel cadmium).
Some low-power solar lights are powered by standard AA or AAA battery-sized nickel-cadmium or nickel-metal hydride batteries. These batteries are small, lightweight, inexpensive and easy to replace, making them ideal for low-power solar lighting.
If you choose to use a nickel-cadmium battery or a nickel-hydrogen battery, nickel-metal hydride batteries have many advantages over nickel-cadmium batteries. For example, the capacity of a single charge is larger and the working time is longer. These characteristics are very practical for solar lamps. Lithium-ion batteries are the only battery that has a larger capacity than nickel-metal hydride batteries, and the cost is higher. Although you will find that nickel-cadmium batteries are almost exclusively used in low-power solar lamps, nickel-metal hydride batteries are used in a wider range of applications, including some high-power solar lamps, sometimes using nickel-metal hydride batteries.
On the other hand, high-power solar lamps generally use lithium-ion or lead-acid batteries (it is now rare to use lead-acid batteries). Lithium phosphate (Lifepo4) batteries have a higher specific energy than lead-acid batteries (which means the battery can carry more energy) while maintaining a smaller size and weight, with a cycle life of up to 2000 cycles. As the cost of lithium phosphate batteries continues to decline, the use of lead-acid batteries in solar lamps is also decreasing. (About the battery, I will write an article later to introduce.)
capacity. The capacity of the rechargeable battery shows the maximum energy that can be stored in the battery, measured in ampere-hours (Ah) or milliampere-hours (mAh). In general, the larger the capacity of the battery, the longer it lasts. On average, nickel-cadmium batteries have the smallest solar cell capacity of about 600 mAh, followed by 2000 mAh nickel-metal hydride batteries. Lithium-ion batteries have a wide range of solar lamps ranging from 2000 mAh to 6000 mAh.
The capacity of the battery alone can't tell you how long a solar light can be bright (brightness, solar panel wattage, motion sensor and other factors are also important), but it gives you a deeper understanding of the overall quality of the lamp. If you see a high-power solar floodlight, it is equipped with a small capacity (less than 2000 mAh) Ni-MH battery or lithium-ion battery, it is best to look at other manufacturers' products, because this configuration is not May store enough charge during the day to provide overnight lighting
In order to increase the duration of the illumination, the solar light is equipped with a motion sensor that turns on the light at a given time interval (usually within a few seconds) and turns off the light after a preset time when motion is detected in front of the light. This helps save energy and provides continuous illumination.
Well, the above is a few aspects that need to be paid attention to when choosing a solar light. Due to the limitation of time and space, many details can't be clearly explained one by one. Later, I will continue to issue a text explanation. Everyone remembers to keep paying attention!
In order to let you know more about solar photovoltaic products, provide better solar energy product solutions. Hope that everyone interested in solar energy products can find the right solar products! Thank you for your attention.
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