During nighttime, rainy days, foggy days and other low visibility conditions, solar cat's eye road studs are crucial facilities for ensuring road safety. They provide clear road boundaries and lane division guidance for vehicles and pedestrians through active lighting, significantly reducing the incidence of nighttime traffic accidents.
However, in actual road applications, many users encounter problems such as the solar cat's eye road studs not lighting up, significantly reduced brightness, or intermittent operation, which not only affects the road guidance effect but also may pose safety hazards.
Next, NOKIN will comprehensively disassemble the working principle of the solar led road studs, analyze 10 of the most common failure causes, provide direct operational detection, solution methods and maintenance guidelines, and also tell you how to choose a more reliable product to completely solve the problem of faults.
To troubleshoot the faults, first understand the core working logic of the solar cat's eye road studs - they do not require an external power source and operate stably through a "daytime charging, nighttime lighting" cycle. The core relies on three working links and key components.
The solar panel on the top of the solar LED road studs absorbs sunlight and converts it into electrical energy. The converted electrical energy is stored in the internal rechargeable battery to reserve sufficient energy for nighttime lighting, ensuring continuous and stable operation at night.
The light-sensitive control system inside the road studs automatically detects the ambient light intensity - when the light becomes dim and reaches the preset threshold, the system will automatically activate the LED light source. The strong light emitted by the LED light source forms active lighting guidance, clearly outlining the road contour and guiding vehicles to travel safely.
The normal operation of the solar cat's eye road studs relies on the coordinated work of five core components. Any component failure will cause a fault. The specific table below shows the core functions and common failure impacts of each component:
|
Component |
Core Function |
Common Failure Impact |
|
Solar panel |
Absorbs solar energy and converts it into electrical power for the system |
Insufficient charging, resulting in the road stud not lighting at night |
|
Rechargeable battery |
Stores electricity generated during the day and supplies power for nighttime lighting |
Reduced brightness, shortened working time, or intermittent operation |
|
LED light |
Provides active illumination and road guidance for drivers at night or in low-visibility conditions |
No light output, flickering, or insufficient brightness |
|
Circuit board |
Controls charging, discharging, and lighting logic, and regulates light sensitivity |
System malfunction, unable to start or shut down normally |
|
Housing |
Protects internal components and provides waterproof, pressure-resistant, and corrosion-resistant protection |
Water ingress or structural damage leading to failure of internal components |
NOKIN, based on a large number of road application cases, has found that the faults of solar cat's eye road studs mainly fall into three categories: environmental influence, component aging, and improper installation. The following are the 10 most common reasons, along with specific causes and failure results, for quick troubleshooting.
Dust, soil, sandstorms on the road, or traffic pollution generated by vehicles, such as exhaust particles, oil stains, etc., will gradually cover the surface of the solar panel. These pollutants will block sunlight, resulting in a significant decrease in the charging efficiency of the solar panel and inability to store sufficient electricity for the battery.
The nighttime lighting brightness significantly decreases, unable to meet the standards for road guidance; working time is greatly shortened, and it may even go out halfway.
Long periods of cloudy days, rainy seasons, or foggy, hazy weather will result in insufficient sunlight exposure and insufficient light intensity. Solar panels cannot fully absorb solar energy and the converted electrical energy cannot meet the battery storage requirements. This is a typical temporary failure caused by environmental factors.
The battery storage is insufficient, and the lights cannot be continuously illuminated at night, or they can only be on for 1-2 hours before going out.
Rechargeable batteries have a fixed number of charge-discharge cycles (usually 500-1000 times). As the usage time increases, the number of charge-discharge cycles becomes excessive, and the active substances inside the battery are depleted, resulting in a gradual decrease in capacity. Generally, the lifespan of a battery is 3-5 years. After exceeding the lifespan, the performance will sharply decline, and even fail to store electrical energy.
The nighttime lighting time is significantly shortened, from the normal 8-12 hours to within 3 hours, and in severe cases, it cannot light up at all; even with sufficient sunlight during the day, it cannot improve the situation.
The waterproof grade of the solar powered road studs is insufficient (lower than IP67), or the sealing glue ages or cracks, and the installation is not properly sealed, causing rainwater, dew, or road ponding to enter the interior. Road ponding, heavy rain weather, will accelerate water penetration, especially for the road studs installed on low-lying sections, the risk of water ingress is higher.
The internal circuit board, LED light source or battery is soaked by water, causing short circuits, corrosion, and directly damaging the components, and the road studs do not light up at all.
On busy and high-load sections such as highways and freight roads, the pressure from heavy trucks, engineering vehicles, etc., may exceed the design pressure resistance standard of solar led road studs (usually ≥10 tons). Long-term pressure will cause the road stud shell to deform, crack, and even the internal components to shift.
The road stud shell cracks, and the internal battery, LED, circuit board, etc. components are damaged; in severe cases, the road stud is crushed off and completely loses its guiding function.
The glue used during installation is insufficient or of poor quality, or the road is uneven, has debris, causing the road stud to not fit tightly with the road surface, and the installation is not firm. The impact force from vehicle movement will cause the road stud to loosen, shift, and even be knocked off.
After the solar powered road stud becomes loose, the solar panel cannot receive sunlight normally, and charging is insufficient; at the same time, the shift will affect the accuracy of road guidance, and in severe cases, the road stud is damaged.
Extreme low temperatures (below -20℃) will reduce the battery's activity, causing a decrease in battery capacity, and even making it unable to charge and discharge normally; extreme high temperatures (above 60℃) will reduce the conversion efficiency of solar panels, and accelerate the aging of internal components. This situation is particularly common in cold regions and tropical areas.
The working time of the solar led road stud is reduced, the brightness decreases; in extreme cases, the battery or circuit board is damaged, and the road stud completely stops working.
Solar cat eye road studs installed in seaside or coastal roads are exposed to high salt fog for a long time. Salt fog will corrode the metal components of the road studs (such as circuit board contacts, battery interfaces). The corrosiveness of salt fog is strong, and it will gradually destroy the electrical connection of the components, affecting current transmission.
Electrical contact is poor, the road stud flickers, works intermittently, and in severe cases, it does not light up; the metal components are severely corroded, and cannot be repaired.
The road stud shell is exposed to the outdoors for a long time and is exposed to ultraviolet rays for a long time. If the exterior material has poor weather resistance (such as ordinary plastic), it will accelerate aging and become brittle. At the same time, long-term wind, sun exposure, temperature changes will also lead to a decline in the sealing performance of the shell.
The shell cracks or breaks, and the internal components are damaged; the sealing performance declines, and rainwater can easily enter the interior, causing short circuit faults.
Some low-cost solar cat eye road studs adopt a separate design for the upper and lower parts, and their anti-pressure structure is insufficient, unable to withstand the impact force from vehicle pressure; or the internal wiring layout is unreasonable, prone to poor contact. These design flaws will significantly increase the failure probability.
The upper and lower components of the solar led road stud are separated, and the internal wiring breaks; the LED light source fails, and the road stud cannot emit light; the structure is damaged and cannot be repaired, and can only be replaced.
Before troubleshooting, it is necessary to clearly determine whether the road stud has really failed to avoid misjudgment (such as temporary insufficient charging due to continuous rainy weather). The following are common failure symptoms and simple detection methods that do not require professional tools.
Regardless of whether there is sufficient sunlight during the day, the road stud has no light at night, which is a serious failure.
Compared with normal road studs on the same section, the brightness is significantly dimmer, making it impossible to clearly see the guiding light.
The light emits intermittently at night, or it automatically goes out after working for a period of time, and then lights up again after a while.
During the day (when sunlight is sufficient), use an opaque object (such as black cloth) to cover the solar panel. Observe if the road stud lights up immediately. If it lights up, it indicates that the photosensitive control system and LED are normal; if it does not light up, it may be a battery or circuit board failure.
Use a simple multimeter to measure the battery voltage (remove the road stud's casing), the normal voltage is 3.7V - 4.2V. If the voltage is lower than 3.5V, it indicates that the battery is aged or insufficiently charged.
Visually check if the road stud casing is cracked or damaged, and if there is water accumulation, water droplets, or rust marks inside. If so, it indicates water ingress failure.
This is the most basic and effective solution, applicable when the battery panel is covered with dust or mud. Use clean water to rinse the surface of the solar panel, then gently wipe it with a soft cloth to remove contaminants, ensuring the surface of the battery panel is clean and free of obstructions. It is recommended to clean once a month. For sections with strong wind and heavy pollution, the cleaning frequency can be increased.
For water ingress failure, regularly check if the sealant of the solar led road stud is aging or cracking. If so, replace the sealant and re-seal the connection between the road stud casing and the road surface. For road studs installed on low-lying sections and prone to water accumulation in rainy weather, increase the number of sealing layers to improve the waterproof effect; if the road stud has water ingress, remove the casing, dry the internal moisture, and check if the components are corroded. If the corrosion is severe, replace the components.
If the battery voltage is too low, capacity has decreased, or the road stud has been used for more than 3-5 years, directly replace it with rechargeable lithium batteries (it is recommended to choose batteries with a capacity of ≥ 2000mAh). Replacing the battery is relatively low-cost, with each battery costing about $5 - $15. After replacement, the solar cat eye road stud can restore its normal working time and brightness, and no replacement of the entire road stud is required.
For waterproof, anti-pressure, and corrosion resistance requirements, it is recommended to replace with high protection level solar cat eye road studs, such as IP67 or IP68 waterproof grades.
High protection level solar powered road studs have better sealing performance and stronger anti-pressure capacity, effectively avoiding water ingress，crushing, salt fog corrosion, etc., making long-term use more worry-free.
Rather than frequent repairs, it is better to choose a quality-reliable and performance-stable solar cat eye road stud to reduce the occurrence of failures at the root.
The waterproof rating directly determines the lifespan of the road studs. It is recommended to choose products with an IP68 waterproof rating, which can effectively prevent rain, water accumulation, and dew from entering the interior and avoid short-circuit faults.
IP68 solar road studs can work normally even when immersed in 1-meter-deep water for a long time, and are suitable for complex environments such as rainy days and low-lying road sections.
Select road studs with an anti-pressure strength of ≥10 tons, which can withstand the long-term rolling of heavy vehicles and avoid shell cracking and internal component damage.
High-quality solar road studs usually have aluminum alloy or high-strength engineering plastic shells, with a reasonable structure design, and can adapt to high-frequency rolling scenarios such as highways and freight roads.
The battery capacity determines the working time of the road studs at night. It is recommended to choose lithium batteries with a capacity of ≥2000mAh. Under normal circumstances, they can continuously emit light for 8-12 hours. Even if it is continuously rainy for 3-5 days, they can still work normally. The battery has a longer lifespan, more charge-discharge cycles, and can reduce the frequency and cost of battery replacement.
The conversion efficiency of the solar panel determines the charging speed and effect. It is recommended to choose high-efficiency monocrystalline solar panels (with a conversion efficiency of ≥18%). Monocrystalline solar panels can efficiently absorb solar energy even in cloudy or low-light conditions, quickly charging the battery, and avoiding the problem of insufficient charging.
For corrosive environments such as beaches, coastal areas, and industrial zones, select solar cat-eye road studs with shells made of corrosion-resistant materials (such as 304 stainless steel, anti-corrosion engineering plastics), which can effectively resist salt fog, exhaust fumes, and chemical substances, extending the lifespan.
There are three common reasons why the solar road stud doesn't work at night. You can check them one by one: Firstly, the battery has aged or been damaged and can't store electricity; Secondly, the solar panel is blocked by dust or sand and doesn't receive enough electricity; Thirdly, during consecutive rainy days, there isn't enough sunlight and the battery doesn't store enough electricity. Additionally, if the spike light gets wet and short-circuits, or if the circuit board has a problem, it will also fail to work.
The overall service life of the solar cat eye road stud is approximately 3 to 5 years. This depends on the quality of the product, the usage environment, and regular maintenance. The rechargeable battery usually lasts for 3 to 5 years, while the solar panel has a longer lifespan, lasting up to 5 to 8 years. By performing simple maintenance regularly, you can further extend its service life.
YES, on rainy days, solar powered road studs can still function, but they require sufficient solar energy reserves. If the road studs are of high quality (such as those with IP68 waterproof rating and large-capacity batteries), they can emit light normally in rainy weather. However, if there are consecutive rainy days for more than 3 days and the sunlight is insufficient, the brightness may decrease and the working time may shorten. Once the rain stops and the sunlight returns, everything will return to normal.
The daily maintenance of the solar cat eye road studs is quite simple and consists of just three steps:
① Clean the solar panels once a month, removing the dust and contaminants from the surface;
② Regularly check the sealant. If it becomes aged and cracked, replace it immediately to prevent water infiltration;
③ Check the battery every three years. If the capacity has decreased, replace it with a new one.
The solar road stud manufacturer NOKIN, recommends that you choose the IP67 or IP68 waterproof grade. Among them, IP68 is the best. IP67 can prevent short-term immersion, while IP68 can keep the product submerged in water for a long time. Whether it's during rainy days, in low-lying areas, or in complex outdoor environments, it can effectively prevent water from entering and causing a short circuit, making it more reliable to use.
Through the analysis in this article, we can observe that the majority of the faults of solar road studs are not due to the quality of the product itself, but rather caused by factors such as battery aging, poor sealing, or environmental conditions (dust, rain, pressure, etc.).
By doing two things, the service life of solar cat eye road studs can be significantly extended: one is to install them correctly, choosing the right location and ensuring a firm and properly sealed installation; the other is to conduct regular maintenance, cleaning the solar panels, checking the sealing, and replacing the aged batteries.
Choosing a high-quality, high-protective-grade (IP68), highly resilient, and large-capacity battery solar cat eye road stud is the key to avoiding faults at the root, reducing maintenance costs, and better ensuring the safety of road night-time traffic.
