Solar Street Light Controller Guide: PWM & MPPT Technology, Features, Installation & Troubleshooting | Queneng
With the advancement of clean energy technologies, solar street lights are widely used in roadways, public areas, and campuses. This guide explores the development of solar street light controllers—from basic to PWM and MPPT technologies—covering working principles, main features, installation steps, and common troubleshooting methods.
1. Evolution of Solar Controller Technologies (Focus on Street Lighting)
| Controller Type | Generation | Control Method | Efficiency | Key Features |
|---|---|---|---|---|
| Basic Controller | 1st Gen | Direct Battery Connection | 70–76% | Obsolete, low energy utilization |
| PWM Controller | 2nd Gen | Pulse Width Modulation (PWM) | 75–80% | Widely used, improves charging performance |
| MPPT Controller | 3rd Gen | Maximum Power Point Tracking | 99% tracking, 97% system | High-end, real-time optimization |
2. Key Features of Modern Solar Street Light Controllers
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Overcharge protection
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Over-discharge protection
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Overcurrent and short-circuit protection
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Overvoltage protection
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Anti-backflow protection (Schottky diode)
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Lightning surge protection (MOV)
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Solar panel reverse polarity protection
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Battery reverse polarity and open-circuit protection
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Temperature compensation
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Self-check functionality
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Recovery interval mechanism
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Light-sensing auto control (light on at night, off during the day)
3. Installation and Configuration Guide
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Install in a well-ventilated area, avoid moisture and direct sunlight.
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Connection order: Battery → Solar Panel → Load.
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Avoid oversizing solar panels or load devices.
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Always check polarity before connection.
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Do not use non-solar sources to simulate charging.
4. Common Faults & Troubleshooting
| Problem | Cause & Solution |
|---|---|
| Light not working | May be daytime (light control active), low battery, or incorrect wiring. Try reinstallation. |
| Works at first, fails after days | Loose or incorrect solar panel connection. |
| Light control doesn’t respond | Light control feature not enabled or wired wrong. |
| Controller LED blinks rapidly | Load short circuit or overload. |
5. Charging Protection Modes (12V System Reference)
| Mode | Voltage Range | Description |
|---|---|---|
| Bulk Charge | 14.6–14.8V | High current, fast charging |
| Equalization | 14.4V | Rebalances cell voltages, improves battery health |
| Float Charge | 13.5–13.7V | Trickle charging to maintain charge |
| Low Voltage Cutoff | 11.1V | Prevents deep discharge, extends battery life |
✅ Conclusion
Modern solar controllers with MPPT tracking, intelligent charging, environmental compensation, and robust protections significantly boost system performance and durability. They are becoming essential for advanced solar street lighting systems.
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FAQ
Solar Street Light Luqiu
What is the expected lifespan of a Luqiu solar street light?
Luqiu solar street lights have a long lifespan, with LED lights lasting up to 50,000 hours and solar panels providing reliable power for over 20 years. The batteries typically last 3-5 years, depending on usage and mainten.
Sustainability
What is the warranty period for Queneng solar street lights?
We offer a 3–5-year warranty on all solar street lights, depending on the model and project requirements. During the warranty period, any issues arising from quality defects will be repaired or replaced at no cost.
Municipal and Public Infrastructure
Are your solar streetlights compliant with international standards?
Yes, our products meet international quality and safety standards, including ISO9001, CE, and RoHS certifications, ensuring reliability and performance.
APMS system
Does the APMS system require regular maintenance?
Yes, regular inspections and maintenance are recommended to ensure optimal operation. QUENENG offers remote technical support and maintenance services to help clients maintain system performance.
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How do solar lights perform in areas with limited sunlight?
Solar lights are designed to work efficiently even in areas with limited sunlight. Modern solar technology uses high-quality solar panels that can store energy even in cloudy or overcast conditions.
Solar Street Light Luhui
How much energy can Luhui solar street lights save compared to traditional street lighting?
Luhui solar street lights can save up to 80% in energy costs compared to conventional street lighting, as they use solar power and have energy-efficient LEDs that consume significantly less power than traditional lighting systems.
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Queneng's Lufei Solar Street Light offers durable, energy-efficient outdoor lighting solutions. This solar-powered street light provides reliable illumination, reducing energy costs and environmental impact. Ideal for outdoor spaces, Lufei ensures safety and security.
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