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5 key components that determine the quality of solar lamps

2021-05-27 15:54:36

The emergence of solar lamps has brought convenience to our lives. Its convenience, practicality, and intelligence have met our more needs for lighting. However, the performance of solar lamps that many people buy is not as good as they are, and the brightness is poor and not durable. Consumers can't identify the good or bad in a short period of time, after a long time, they can't get a humanized solution, the lack of market standards, the high price and the unsatisfactory effect, etc., have all become critics of the market.


So how can we buy products with high quality and good price? How to avoid merchants’ routines? How to choose the right product at the beginning of the purchase? Before answering these questions, let's take a look at the structure of solar lamps. What are the key components of it?


Solar led lamps are mainly composed of five key components: photovoltaic panels, batteries, led light sources, lamp housings, and control systems. Below we analyze the functions of these five aspects and the misunderstandings in application one by one.


1. Photovoltaic panels

The photovoltaic panel determines the brightness of the lamp. Everyone here is wondering, shouldn't the light source determine the brightness of the lamp? How does the photovoltaic panel determine the brightness of the lamp? First of all, the light source needs enough electricity to drive. The 1W light source needs about 300mAH to turn on for 1 hour. When your photovoltaic panel can input enough power to the battery, the battery can provide enough power to the light source and the lamp can be set Lights up at a certain brightness; when your photovoltaic panel can’t input enough power to the battery, the battery can’t provide enough power to the light source, and the lamp appears to be dimmed.


So what kind of photovoltaic panels should be used? First of all, the photoelectric conversion rate of photovoltaic panels should be high. At present, the photoelectric conversion rate of polycrystalline silicon cells (the main material of photovoltaic panels) in mass production can reach >18%. The photoelectric conversion rate of photovoltaic panels used in solar lamps is measured to be more than 17%, which is considered good; secondly, photovoltaic panels The power of the board must be sufficient. What is enough? In a sunny environment, the electricity generated by the photovoltaic panel can be considered sufficient when the battery is fully charged in about 5 hours (the average annual sunshine time in most places in China is 4-6 hours).



The battery plays a major role in the life of the lamp. At present, the life of photovoltaic modules is basically more than 20 years; the life of the light source has reached 30,000 to 50,000 hours, and it has a life of 10 years based on the lighting time of 10 hours a day; the theoretical life of the new ternary lithium battery is 1,200 times. The lifespan of charging and discharging and lithium iron phosphate batteries can be charged and discharged more than 2000 times, which is equivalent to a life span of 6-8 years. But it should be noted that this is a brand new battery, in fact 99% of the batteries used in solar lamps are disassembled batteries for new energy vehicles. Why not use brand new batteries? One is that brand-new batteries cannot be bought, and brand-new lithium batteries are basically contracted by automobile manufacturers; second, the cost of brand-new lithium batteries is extremely high. For ternary lithium batteries, the new wholesale cost price is about 5 yuan/A. 


3. led light source

The more light sources, the better. Every time I visit a certain treasure and a certain Dong I see similar products, advertising 500 or even 1,000 LED lamp beads used in their own solar lamps and lanterns. As a person in the industry, I find it ridiculous. The power of the solar lamp is supplied by the battery. How much power it can achieve depends on the capacity of the battery. When the battery can only be used for 20 watts of light for 10 hours, whether you have 50 or 500 lamp beads, its actual The power can only be up to 20 watts. Anyone who has studied physics knows that the longer the circuit through which electricity passes, the greater the resistance, and more lamp beads will only produce a longer circuit, and larger resistance will waste more power, so the more lamp beads are not. Okay, enough is enough.


4.The lamp body shell

The lamp body shell made of die-cast aluminum is more durable and waterproof. At present, there are basically two types of shell materials for solar lamps on the market: one is a plastic shell and the other is a cast aluminum shell. The cost of the plastic shell is low, but it has a short life and poor waterproof performance when exposed to the sun outdoors; the die-cast aluminum shell is durable, waterproof, and the lamp has good heat dissipation. The outdoor projects we do use die-cast aluminum shells and must It is a thick cast aluminum shell, but the disadvantage is high cost.


5.Control system

The control system plays a key role in the life of the battery and controls the brightness of the lamps. Here first popularize the functions and functions of the control system. Most solar light fixtures will have smart phone remote control, light control, time control, full brightness, semi brightness, automatic adjustment, etc., which requires a control system. Limited by the limitation of the battery, we know that the solar lamp cannot achieve 100% power light like the lamp of the city electricity. When the battery capacity becomes low in continuous rainy days, it cannot work as if it is fully charged. It needs a The intelligent system intelligently adjusts the power output according to the battery capacity, allowing the lamp to work under a good working condition, thereby ensuring its life. The control system we use not only allows the lamps to achieve basic functions such as remote control, light control, time control, full brightness, semi-brightness, and full automatic control, but also requires it to control the input and output according to the real-time capacity of the battery, so as not to overcharge the battery Over-discharge, to protect the life of the battery and make it more durable.

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