Solar street lights have been widely used in urban and rural lighting due to their environmental protection, energy saving, and low maintenance cost. However, battery failure of solar streetlights is still a common problem that users encounter. These failures not only affect the lighting effect but may also cause the failure of the entire system. This article will provide you with a series of practical tips on solar street light battery troubleshooting to help you effectively solve related problems, while also improving the service life and efficiency of solar street lights.
Common battery failure manifestations in solar street lights.
1. The lamp does not light up possible causes:
● Battery not charging: This could happen if the solar panel is damaged, improperly installed, or not receiving enough sunlight.
● Discharge function failure: The battery itself might be faulty, preventing proper discharge, or there could be a wiring or controller issue.
2. Reduced brightness possible causes:
● Battery capacity loss: Over time, the battery’s capacity naturally decreases due to aging or insufficient maintenance (e.g., overcharging or deep discharging).
● Battery aging: If the battery has reached the end of its lifespan (typically 5-8 years for most batteries), it will hold less charge, resulting in lower brightness.
3. Frequent flashing possible causes:
● Unstable battery voltage: This could be a sign of internal battery issues, such as a damaged cell or poor charge retention.
● Poor contacts: Loose or corroded terminals or poor wiring connections can result in unstable voltage delivery, causing the light to flash intermittently.
4. Slow charging possible causes:
● Battery damage: If the battery has suffered from over-discharge, extreme temperatures, or other forms of abuse, it may charge more slowly or fail to hold a charge.
● Solar panel damage: A malfunctioning solar panel that is not generating sufficient power will result in slow charging or no charging at all.
Solar street light battery troubleshooting steps
1. Check the Solar Panel
Inspection: Inspect the solar panel for visible damage, cracks, or discoloration. A damaged panel may not generate enough power to charge the battery.
Cleaning: Gently clean the panel with water and a soft cloth or brush to remove dust, debris, or bird droppings. Use non-abrasive cleaners to avoid damaging the surface.
Obstructions: Ensure there are no physical obstructions like branches, buildings, or other shadows blocking the panel from receiving full sunlight. Regularly trim nearby foliage.
2. Check the Battery Connection
Connection Points: Inspect the connectors, terminals, and cables for corrosion, wear, or loose connections. Clean any corrosion with a wire brush and apply dielectric grease to protect the terminals.
Polarity Check: Double-check the positive and negative connections to ensure they match the battery’s specifications. A reverse connection can lead to battery failure or damage to the controller.
3. Measure the Battery Voltage
Voltage Range: For a 12V system, a fully charged battery should show a voltage of around 13.2V to 13.8V.
For a 24V system, it should be around 26.4V to 27.6V. If the voltage is significantly lower (e.g., below 12V for 12V systems), it could be a sign that the battery is undercharged, defective, or at the end of its life.
Voltage Drop: If the voltage quickly drops below the normal range after a short period of charging or use, this can indicate a battery that is aging or has internal short-circuiting.
4. Test the Battery Capacity
Discharge Test: Perform a controlled discharge by connecting the battery to an appropriate load and monitoring the voltage drop over time. Compare the time it takes for the battery to discharge to the manufacturer’s specifications for normal usage.
Capacity Measurement: If you have access to a battery capacity tester, use it to measure the actual available capacity in Ah (amp-hours). A significantly reduced capacity indicates that the battery may no longer be capable of holding enough charge to power the light through its intended runtime.
5. Check the Controller
Controller Diagnostics: The solar charge controller may be malfunctioning, leading to improper charging or discharging. Check the controller’s settings and ensure it’s properly configured for the battery type and system requirements.
Error Codes: Some controllers have diagnostic features, such as error codes or indicator lights. Refer to the controller’s manual to see if any codes indicate an issue with charging or battery management.
Solar Street Light Battery Maintenance and Care Tips
1. Regular Inspection
Perform regular checks (every 3 to 6 months) on the solar panels and batteries to ensure they are functioning properly. Look for signs of physical damage, corrosion, or aging. Pay special attention to any loose connections or wear on the battery terminals.
2. Clean the Panels
Keep the solar panels free of dirt, dust, bird droppings, or water stains that can reduce their ability to absorb sunlight. Use a soft cloth or sponge with water and mild detergent, and avoid harsh cleaning agents that could damage the panel’s surface. Clean during the cooler parts of the day to prevent thermal stress on the panels.
3. Avoid Deep Discharge
Ensure that the battery is not discharged below 20-30% of its capacity. Deep discharges can cause irreversible damage to the battery and shorten its lifespan. If possible, opt for a battery management system (BMS) that prevents over-discharge.
4. Replace the Battery on Time
Battery performance may degrade after 5 years, depending on usage. Keep an eye on the system’s performance—if the lights start to dim earlier than usual or fail to stay on for the expected duration, it may be time to replace the battery. Regular capacity checks (such as discharge tests) can help gauge battery health.
5. Maintain an Ideal Environment
Install solar street lights in locations with ample sunlight and avoid areas prone to extreme temperatures, excessive humidity, or direct exposure to corrosive elements. High temperatures can accelerate battery aging, while cold temperatures may reduce battery capacity temporarily. Ideally, the installation area should have good air circulation to prevent overheating.
Conclusion
Solar street lights are a green and environmentally friendly lighting solution, but they may encounter poor charging problems during use. Based on the above analysis, users should regularly check the various components of solar street lights, including panels, batteries, connection lines, and controllers, to ensure their normal operation. At the same time, trust E-lite as a Committed to Quality and Reliability in Solar Lighting manufacturer.
E-Lite Semiconductor, Co.,Ltd
Att: Jason, M: +86 188 2828 6679
Add: No.507,4th Gang Bei Road, Modern Industrial Park North, Chengdu 611731 China.
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Post time: Feb-21-2025
