In schools, communities, and urban roads, solar pedestrian crossing signs are the core equipment for ensuring the safety of pedestrians at night. Their main function is to enhance visibility for pedestrians and reduce the incidence of night traffic accidents.
Compared to traditional power grid-based pedestrian crossing signs, solar models, with their advantages of no wiring, energy conservation, and flexible installation, have become the preferred choice for areas without power grids (remote sections, temporary construction areas).
However, during long-term outdoor operation, affected by environmental interference, component wear and tear, and improper installation, solar pedestrian crossing signs are prone to various failures, which not only affect road safety but also shorten the equipment's service life.
NOKIN will focus on solar crosswalk sign problems, combined with engineering-level practical experience, to reconstruct the troubleshooting, solution, and maintenance system, providing professional guidance for solar pedestrian crossing sign troubleshooting and maintenance, helping relevant personnel quickly solve problems and reduce maintenance costs.
The stable operation of solar pedestrian crossing signs relies on three core components: photovoltaic modules (solar panels), energy storage systems (batteries), and control systems (controllers).
The complexity of outdoor environments (extreme temperatures, rainy weather, dust obstruction), non-standard installation procedures, and lack of regular maintenance are the three main causes of frequent failures - according to industry data, 80% of solar system failures are caused by the lack of regular maintenance.
The following will address the 7 most common failures, following the logic of "failure symptoms → core reasons → step-by-step solutions", breaking them down in a professional and readable manner, allowing non-professionals to quickly identify and troubleshoot.
The following failures are sorted by "from high to low occurrence rate", each failure is accompanied by a clear cause analysis and a feasible solution, and core precautions are marked to avoid secondary damage to the equipment during the troubleshooting process.
After the light fades in the evening, the sign has no light or is normal during the day but suddenly goes out at night, directly causing a significant drop in pedestrian visibility and posing a serious safety hazard.
Firstly, test the battery: Use a multimeter to measure the battery voltage. If the voltage is below the rated value of 80% and cannot recover after charging, replace the battery of the same specification immediately;
Check the control module: Observe the status of the controller indicator light. If the indicator light is off or flickers abnormally, restart and it still does not work, replace the controller; use a shading cloth to shade the light sensor module, if the sign does not light up, it indicates a fault in the light sensor module, and it should be replaced immediately;
Check the lines: Check the connection terminals one by one, clean the oxidation layer, and re-tighten the loose connections to ensure there are no damages and the contacts are firm.
Battery cannot be fully charged, the light stays on for a short time and has insufficient brightness at night. Even on sunny days, it is difficult to achieve the normal charging effect. Over time, this will accelerate battery aging.
- Panel obstruction: Dust, bird droppings, fallen leaves and other debris accumulate on the surface of the solar panel, directly blocking sunlight and significantly reducing the efficiency of photoelectric conversion, resulting in insufficient charging of solar crosswalk signs;
- Incorrect installation position: Trees, buildings, billboards and other surrounding objects form long-term shadows, preventing the solar panel from continuously receiving sufficient sunlight, thereby affecting the charging effect;
- Inappropriate installation angle: The inclination angle of the solar panel is too large, unable to maximize the capture of sunlight, resulting in a significant decrease in charging efficiency and potential battery power shortage over time.
Regular cleaning and maintenance: Every 1–3 months, use a soft cloth and clean water to gently wipe the surface of the solar panel. Do not use hard objects to scratch or corrosive cleaning agents to prevent damage to the panel coating, ensuring stable photoelectric conversion efficiency;
Optimize installation position: Adjust the solar panel to face south (or the direction of maximum sunlight in the local area), completely avoiding obstacles such as trees, buildings, etc., to ensure that it can receive sufficient and continuous sunlight during the day, solving the problem of insufficient charging at the source;
Scientifically adjust inclination angle: Set the inclination angle of the solar panel based on the local latitude, recommend keeping it consistent with the local latitude or slightly higher by 5°–10°, to maximize the amount of sunlight received and optimize charging efficiency, providing sufficient energy for the stable operation of solar crosswalk signs.
After using the battery for 1–2 years, the capacity significantly decreases, the charging and discharging speed increases, frequent power shortages occur, and it even fails to support the lighting at night, requiring frequent battery replacements.
Replace with high-quality batteries: Prioritize using lithium iron phosphate batteries, with a cycle of charging and discharging up to 1500–3000 times, with a lifespan 3–5 times that of ordinary lead-acid batteries, and better resistance to high and low temperatures;
Rationally configure capacity: Based on local sunlight conditions and lighting requirements, configure batteries with a capacity of ≥3–5 days of backup, avoiding deep discharge due to continuous rainy weather;
Equip protection system: Install an intelligent battery management system (BMS) to prevent overcharging and overdischarging; Pair with a temperature control device to alleviate the impact of extreme temperatures on the battery.
|
Battery Type |
Number of Cycles |
Life Expectancy |
Applicable Scenarios |
|
Low-quality Lead-acid Batteries |
300–500 |
1–2 years |
Temporary use, budget-limited scenarios |
|
High-quality Lead-acid Batteries |
500–800 |
2–3 years |
Ordinary outdoor scenarios, short-term projects |
|
Lithium Iron Phosphate Batteries |
1500–3000 |
5–8 years |
Long-term use, extreme temperature scenarios |
The LED light bulbs flicker, alternate between bright and dim, or the overall brightness significantly decreases, unable to reach the specified warning brightness, making it difficult for pedestrians and vehicles to clearly identify the signs at night.
Check the driver module: Observe if the driver is overheating or damaged. If faulty, replace it with a module of the same specification;
Tighten the wiring: Check the wiring of the LED, driver, and controller one by one, re-tighten the terminals to ensure good contact;
Replace the LED component: If a single light bulb is damaged, it can be replaced individually. If multiple light bulbs are damaged, it is recommended to replace the entire LED panel to ensure uniform brightness.
The LED lights are not on for a short period of time at night, unable to cover the peak traffic hours (such as 18:00–22:00), and they turn off prematurely, affecting the safety of the night road.
Upgrade battery capacity: Replace the battery with a larger capacity one according to the lighting requirements to ensure sufficient backup power;
Install intelligent dimming device: Combine with a human body sensor module, reduce brightness when no pedestrians or vehicles are present, and restore normal brightness when there is traffic demand, reducing power consumption;
Optimize controller settings: Adjust the lighting hours, normal brightness during peak hours (18:00–22:00), and reduce brightness during off-peak hours to extend the lighting time.
The equipment frequently experiences various faults after installation, such as insufficient charging, short circuits, being damaged by lightning strikes, etc., and the faults recur repeatedly, making it difficult to completely solve.
Standardize construction: Follow the equipment manual and local road construction standards to determine the installation location, angle, and height to ensure sufficient sunlight for the solar panel;
After installation, conduct comprehensive tests: After completion of the installation, perform charging tests, lighting tests, and fault alarm tests to ensure the equipment operates normally;
Hire a professional team: Choose a qualified installation team to avoid leaving hidden dangers from non-professional operations.
After long-term operation, the fault frequency increases year by year, the LED brightness decreases, the battery fails prematurely, maintenance costs rise significantly, and even shortens the overall lifespan of the equipment.
Most users ignore daily maintenance and do not establish an inspection system, resulting in problems such as component aging, accumulation of debris, and loose wiring that cannot be detected in time, and small problems gradually expanding into major faults.
Formulate an annual inspection plan: Conduct at least 2 comprehensive inspections per year, focusing on checking core components such as batteries, solar panels, controllers, and lines;
Regular cleaning and testing: Clean the solar panel every 1–3 months, test the battery voltage and controller output every 6 months, and promptly identify potential problems;
Replace easily damaged parts in advance: Replace aging batteries, LED bulbs, and wiring terminals according to component lifespan to prevent the faults from expanding.
Rather than repairing after a malfunction, it is better to take preventive measures in advance. Through scientific preventive measures, the failure rate can be reduced by over 80%, extending the service life of the equipment and lowering maintenance costs.
Choose well-known brands for solar panels, batteries, and controllers. High-quality components have greater stability and a lower failure rate, making them more convenient to use over the long term.
Based on local sunlight conditions, climate environment, and lighting requirements, design the system configuration reasonably to ensure a proper match of components and avoid insufficient or excessive capacity.
Define the person responsible for inspections, the frequency of inspections, and the inspection contents, keep records of inspections, promptly handle small problems found, and avoid the expansion of problems.
Keep the surface of solar panels clean, avoid shading, ensure stable charging efficiency, and provide sufficient energy for the stable operation of the equipment.
Solar pedestrian crossing signs have significant value in improving road safety and ensuring the safety of pedestrian passage, especially in areas without power grid coverage, where their advantages are irreplaceable.
The long-term stable operation of equipment cannot be achieved without the cooperation of "high-quality components + standardized installation + continuous maintenance" - photovoltaic components are responsible for energy collection, the energy storage system is responsible for energy storage, and the control system is responsible for overall coordination and regulation. The three work together to maximize the function of the equipment.
This article provides comprehensive troubleshooting and maintenance guidance for solar crosswalk signs problems, covering issues such as school, community, and urban roads. Relevant responsible persons can quickly solve equipment failures and reduce maintenance costs by following the fault troubleshooting steps and preventive measures in this article.
Doing a good job in daily maintenance and fault troubleshooting can not only extend the service life of solar pedestrian crossing signs but also ensure their continuous protection of nighttime pedestrian passage safety, truly fulfilling their role as road warning signs.
