Rainy days are a "high-risk scenario" for road safety: visibility drops sharply, water accumulation on the road surface reflects light, and the braking distance of vehicles is prolonged. As an active lighting road sign, solar road studs can continuously glow in the rain and avoid water ingress and short circuits, which directly affects the safety of night driving and long-term maintenance costs. For road engineering procurement and traffic management departments, choosing the wrong waterproofing grade or neglecting the compatibility during the rainy season not only leads to frequent malfunctions of road studs but also may cause safety hazards. This article will deeply interpret the waterproof standards of solar LED road studs and their actual performance in the rain, and provide full-process suggestions from selection, installation to maintenance to assist in precise decision-making.
The rain working capacity of solar cat eyes road studs relies on the dual guarantee of "energy conversion + sealing protection". The core structure consists of four major components:
Clouds on rainy days can block sunlight, causing a significant drop in the charging efficiency of solar panels - usually, the charging volume on rainy days is only 20% to 40% of that on sunny days. This will directly affect the night brightness and continuous luminous time of the road studs.
High-quality road studs will automatically activate energy-saving modes (such as switching from constant brightness to flashing or reducing LED power).
If the battery capacity is insufficient or there is no energy-saving design, it may go out prematurely at night.
The water resistance rating (IP code) is the core indicator for judging the adaptability of solar cat eyes road studs in rain. It consists of "dust resistance rating (X)" and "water resistance rating (Y)", with the format IPXY.
|
IP Rating |
Dust-proof Rating (X) |
Water-proof Rating (Y) |
Core Protection Capability |
|
IP54 |
5 – Prevents harmful dust accumulation |
4 – Resistant to water splashes from any direction |
Prevents harmful dust and water splashes. Suitable only for dry or low-rainfall areas; water may enter during rainy days. |
|
IP65 |
6 – Completely dust-tight |
5 – Resistant to pressurized water jets |
Fully dust-proof and water-resistant. Can withstand normal urban rainfall but not suitable for areas with standing water. |
|
IP67 |
6 – Completely dust-tight |
7 – Protection against short-term immersion (1 m for 30 min) |
Ideal for rainy regions or roads with temporary water accumulation. Prevents dust and withstands short-term immersion. |
|
IP68 |
6 – Completely dust-tight |
8 – Protection against long-term immersion (depth specified by manufacturer) |
Suitable for areas with floods, long-term water accumulation, or coastal salt-spray environments; provides the highest water-resistance level. |
After industry measurement and engineering verification, the performance of solar cat eyes road studs in rain can be summarized as follows:
High-quality, well-sealed road studs (IP67/IP68) can usually operate normally under heavy rain and short-term flooding. The LED light source and circuit are protected by a sealed structure, preventing water ingress and short circuit.
Insufficient light on rainy days is the core limiting factor: A single heavy rain can reduce the charging volume of the day, and continuous rainy days may lead to weakened brightness and shortened luminous duration the next day. At this time, the importance of the battery management system and energy-saving mode becomes prominent.
Road studs with low IP ratings (such as IP54/IP55) or poor sealing are prone to water ingress, short circuits, battery damage and other faults when exposed to heavy rain or long-term water accumulation, and may even fail completely.
For areas with heavy rainfall, the selection should be based on IP67 as the bottom line. For scenarios with water accumulation, IP68 should be directly chosen. When making a purchase, the manufacturer must be required to provide:
The material of the shell directly affects the water resistance and durability.
Recommended choices:
Battery is the key to battery life in rainy days.
Priority choices:
High-quality solar road studs should have a flexible working mode:
Give priority to manufacturers with a warranty period of no less than 3 years to cover issues such as aging of sealing parts and battery degradation.
It is required to provide application cases in rainy season/flood areas (such as projects on rainy urban roads and low-lying sections) to verify the actual adaptability of the product.
When installing, ensure that the road studs are flush with the road surface. Fill the edge gaps with special sealant to avoid the formation of water seepage channels.
When fixing the screws, apply force evenly and do not over-tighten them to avoid deformation and failure of the sealing gasket.
The installation area must ensure that the road surface has a slope of ≥2% to guide rainwater to flow away quickly and prevent long-term water accumulation on the surface of the road studs.
For low-lying sections prone to water accumulation, the installation height of the solar cat eyes road studs can be appropriately increased (not exceeding 5mm of the road surface) to reduce the immersion time.
Random sampling of batch products is conducted for a 1-hour water immersion test (IP67 standard) to observe whether water has entered.
Use a multimeter to test the insulation of the sealed circuit to ensure there is no risk of leakage.
Different road surfaces require different installation techniques
Rainwater can carry sediment and oil stains to adhere to solar panels, further reducing the light absorption efficiency (when pollution is severe, the charging efficiency drops by more than 50%).
Suggestion: Clean once a month, rinse with clean water and wipe with a soft cloth. Avoid using corrosive cleaning agents.
Before each quarter or the rainy season, check whether the rubber sealing rings and fixing screws of the road studs are loose and whether there are any cracks on the surface.
If the sealing ring is found to be aged or the screws are rusty, replace the parts immediately and reseal.
After continuous rainy days, use professional equipment to test the battery voltage (normal voltage range 3.2V-3.7V) and observe whether the brightness at night meets the standard.
For solar cat eyes road studs with significantly reduced brightness, replace them point by point or send them to the factory for battery performance testing.
Record the installation time, fault location and fault mode (such as water ingress, battery failure) of each batch of road studs;
Based on the ledger data, formulate a targeted replacement plan (generally, the lifespan of solar road studs is 3 to 5 years, and in areas with frequent use during the rainy season, the replacement cycle can be appropriately shortened).
According to industry test data: In rainy weather with visibility ≤200 meters, the visible distance of solar road studs with active lighting can reach 150-200 meters, while that of traditional passive reflective road studs is only 30-50 meters.
A road renovation case in a rainy city in Southeast Asia shows that after installing IP68 solar road studs on sections prone to water accumulation, the accident rate on rainy nights decreased by 62%, and the average emergency braking response time of vehicles was shortened by 0.8 seconds. This is because the active LED light source of the solar road studs is not affected by the reflection of rain, allowing drivers to notice the road outline and lane boundaries earlier, significantly enhancing driving safety.
A1: Use a multimeter to test the battery voltage: If the voltage is less than 3.0V, it may be that the battery is low on power and needs to be charged before testing.
Remove the solar road studs to check for water ingress: If there are water marks in the circuit compartment, dry the circuit, replace the sealing ring and then reseal it.
Check the charging voltage of the solar panel: If the charging voltage is less than 0.5V (under sunny light), it may be that the solar panel is damaged and needs to be replaced.
A2: When selecting a model, give priority to choosing a large-capacity battery of ≥3000mAh and pair it with a high-efficiency solar panel.
Enable energy-saving modes (such as flashing mode) to reduce power consumption;
For sections prone to water accumulation, the installation density of solar cat eyes road studs can be increased to make up for the insufficient brightness of individual studs through quantity.
A3: The shell is made of anti-corrosion aluminum alloy (with surface anodizing treatment), and all accessories are made of 316 stainless steel.
The waterproof grade must reach IP68, and at the same time, the manufacturer is required to provide a salt spray test report (no corrosion for ≥500 hours).
The rainy weather adaptability of solar road studs mainly depends on the waterproof level, sealing design and battery performance. Based on the project scenario, the following standards can be used for precise selection:
Occasional short-term rain and sections without water accumulation: IP67 grade + aluminum alloy casing + lithium iron phosphate battery, meeting basic requirements;
With frequent rainfall and short-term water accumulation throughout the year: Prioritize IP68 grade + anti-corrosion material + large-capacity battery + energy-saving mode to ensure stability.
Frequent floods and salt spray environment by the sea: IP68 grade + 316 stainless steel accessories + salt spray anti-corrosion treatment + 5-year warranty, reducing maintenance costs.
Request the actual test report: including IP immersion test, withstand voltage test, and battery life curve;
On-site trial use: Before bulk purchase, take samples for 7 to 14 days of immersion and continuous rainy day simulation tests;
Locked Service: Request the manufacturer to provide on-site installation guidance and emergency maintenance services during the rainy season to ensure that problems are resolved promptly.
