The outdoor environment in winter has three fatal characteristics that simultaneously impact the core operating system of the studs, ultimately causing failure:
The combination of these three factors will completely destroy the energy system (solar panels + batteries), structural system, and optical system of the studs. Mildly, the brightness will decrease and the battery life will shorten; severely, the studs will completely stop working and suffer hardware damage.
For areas with high latitudes, heavy snowfall, and extreme cold, the failure rate of solar road studs in winter is much higher than in normal temperature areas. This is not due to any quality defect of the product, but rather the special winter environment creates a "multiple pressure" harsh working condition.
In addition, winter is accompanied by continuous rainy and snowy weather, and the photovoltaic panels cannot charge for a long time, further increasing the failure probability. This is the root cause of the frequent failure of solar road studs in cold areas during winter.
The battery is the "heart" of the solar road studs, and low temperatures are the number one enemy of the battery, which is also the core cause of battery performance failure in cold weather solar road studs.
When the environmental temperature drops below 0°C, the chemical reaction rate inside the ordinary lithium battery sharply decreases, and the effective capacity of the battery will directly drop by 30% - 50%.
Capacity reduction directly leads to a significant reduction in the lighting duration of the studs at night. A stud that could shine for 8 hours originally may only shine for 2-3 hours in winter, completely losing its road warning function.
Low temperatures will inhibit the battery's charging acceptance ability. Even with light, the electricity generated by the photovoltaic panel is difficult to be smoothly stored in the battery, resulting in the problem of "can't be charged, can't be stored", further exacerbating the state of insufficient power.
Continuous low temperatures will continuously reduce the activity of the battery electrolyte, destroying the electrode structure. Not only will the single discharge performance deteriorate, but the overall service life of the battery will also be significantly shortened, accelerating the scrapping of the road studs.
Solar road studs rely on photovoltaic power supply. The winter sunlight conditions plummet sharply, directly leading to insufficient energy supply and causing solar road stud failure due to low temperature.
In high-latitude cold areas, the winter days are short and nights are long, and the effective sunlight duration is reduced by more than 50% compared to summer. The photovoltaic panel's charging time is severely insufficient.
In winter, the solar altitude angle decreases, and the light is obliquely shone on the photovoltaic panel, resulting in a significant decrease in light energy reception efficiency. Under the same light duration, the power generation is much lower than in summer.
In winter, there are frequent snowstorms, heavy rain, and haze, and the photovoltaic panels cannot receive sunlight for several consecutive days, causing the battery to run out of power completely and stopping the studs from working.
Snow cover is the most direct reason why solar powered road studs do not work in snow. The photovoltaic system is extremely sensitive to shading, even a partial snow cover can cause a significant drop in efficiency.
When thick snow completely covers the photovoltaic panels, light cannot penetrate, the photovoltaic components stop generating electricity, and the battery has no power replenishment. Within a short period of time, it will run out of power and stop working.
Even if a thin layer of snow or ice covers some of the photovoltaic panels, it will disrupt the circuit balance of the panels, causing the overall panel's power generation efficiency to drop by more than 70%, far from meeting the normal charging requirements.
In addition to energy system failures, ice and snow can also damage the optical system of the solar road studs, making them "unable to light up and unclear", losing their value for road safety.
When ice and frost form on the surface of the road stud lamp cover, the light emitted by the LED source is refracted and blocked by the ice layer, resulting in a significant decrease in light output efficiency, and the light brightness becomes noticeably dimmer.
The blurry light will make vehicle drivers and pedestrians perceive the distance before recognition as shorter, easily causing traffic accidents on slippery winter roads.
Solar road studs are exposed to the road surface all year round and need to withstand vehicle crushing and snow shovel impacts. The low temperature will cause a dramatic change in the material properties of the stud shell, significantly increasing the probability of damage.
Common plastics and aluminum alloys will gradually become brittle below -20℃, with their impact resistance and crushing resistance significantly decreasing, and their toughness almost lost.
When the brittle studs are impacted by winter snow removal vehicles or sudden braking of vehicles, they are prone to cracking and breaking, with internal components directly exposed, resulting in complete failure.
Apart from the aforementioned obvious failures, there are three hidden factors that are easily overlooked in cold areas, which will secretly shorten the lifespan of the studs and are considered hidden fault points in winter.
The freeze-thaw cycle is the "chronic killer" of outdoor equipment in cold areas. The principle is simple but the destructive power is extremely strong：
During the day, the temperature is slightly higher, and the snow and ice melt into water, seeping into the gaps of the studs; at night, the temperature drops sharply, and the water freezes and expands, repeatedly squeezing the structure of the studs.
Repeated expansion and contraction over a long period will cause the stud shell to crack and the internal components to shift, ultimately triggering a structural failure.
The sealing components of ordinary road studs will age and harden at low temperatures, significantly reducing their sealing performance and losing their waterproof effect.
When water enters the road studs and freezes, it expands further, further breaking the sealing structure, ultimately causing the circuit board to short circuit, the battery to leak electricity, and the studs to be completely scrapped.
Winter road deicing will spray a large amount of salt-based deicing agents, and snow slush and salt particles adhere to the studs, causing dual hazards：
The climates in cold areas vary greatly, and the main failure causes of solar studs in these areas are also different. Targeted inspections are more efficient, and the specific differences are as follows in the table：
|
Cold Area Type |
Typical Temperature / Environment |
Core Failure Cause |
Fault Manifestation |
|
Extremely Cold Areas |
-30°C or below, prolonged low temperatures |
Battery performance degradation, sharp capacity decline |
Unable to charge; extremely short lighting duration |
|
Snowy Areas |
Frequent snowfall, heavy snow accumulation |
Photovoltaic panel blockage, power generation failure |
Completely stops working during snowfall; cannot self-recover |
|
Freeze-Thaw Alternating Areas |
Large day-night temperature differences, repeated freeze-thaw cycles |
Structural fatigue, sealing failure |
Housing cracks; water ingress leading to internal short circuits |
Cold environments are not a "forbidden zone" for solar road studs. As long as the right product is selected, the design is optimized, and maintenance is done properly, the problems related to solar road studs in winter can be completely solved, and stable power supply in winter can be achieved.
Replace ordinary lithium batteries with low-temperature versions of lithium iron phosphate (LiFePO4) batteries. These batteries can work normally in environments ranging from -40℃ to 60℃, with the capacity reduction controlled within 10%, completely solving the problem of battery performance in cold weather.
Monocrystalline silicon photovoltaic panels have better weak-light performance than polycrystalline silicon. In winter, under slanting sunlight and cloudy conditions, the power generation efficiency is higher, and they can capture the limited light to the maximum extent, ensuring the basic charging capacity.
Abandon flat photovoltaic panels and adopt the design of inclined slope and arc-shaped top surface for the studs. Gravity can make snow and frost fall naturally, reducing the probability of obstruction, and preventing solar road studs from not working in snow from the source.
Use high-strength PC material and cast aluminum shells for the studs, combined with thickened anti-pressure bases, to enhance the anti-rutting and impact resistance in low temperatures, and resist snow shovels' knocks and vehicle crushes.
Choose solar road studs with IP68 waterproof grade. Adopt an integrated sealing process. The sealing components will not deform or age in low temperatures, eliminating the risks of water intrusion due to freeze-thaw and short-circuit faults.
In summary, the failure of solar road studs in cold areas is not due to the low temperature itself, but to the product design not being adapted to cold conditions. The core issues can be summarized into three points:
|
Issue Category |
Description |
|
Energy System Adaptability |
Energy system adaptability is poor: Batteries and photovoltaic panels do not meet the requirements of low-temperature and weak-light conditions |
|
Material Selection |
Material selection is unreasonable: Ordinary materials cannot withstand low temperatures, freeze-thaw cycles, and corrosion |
|
Structural Design |
Structural design has flaws: There is no snow prevention, waterproofing, or impact resistance optimization |
|
Conclusion |
The conclusion is clear: High-quality solar road studs specifically designed for cold areas can operate stably in extremely cold and snowy environments |
Avoid low-priced and inferior products, choose low-temperature customized models, and do a good job in winter maintenance, and you can completely get rid of the problem of failure in low temperatures.
A: Yes, they can. However, the efficiency of regular studs will significantly decrease. Choosing the anti-snow and low-temperature customized models, along with timely snow removal, can maintain normal lighting and warning functions.
A: The main reason is that low temperatures cause battery performance to decline + insufficient charging in low-light conditions. Additionally, ice forming on the lamp cover will also weaken the light brightness.
A: Absolutely, but they must use specialized models that are resistant to low temperatures, anti-snow, and highly waterproof. Ordinary models are not recommended for installation in cold areas.
A: The unit price of high-quality low-temperature solar road studs is approximately $15 - $30. The exact cost varies depending on the material, performance, and purchase volume. The long-term use offers a much higher cost-effectiveness than ordinary models.
