There is a big question of solar street lighting for the international trading business. Many buyers and clients will ask the factory or company: How can you solve problem questions? If products are with problems, can you fix it? How easy or hard to solve them?
All of these questions are normal and we have to take seriously to deal with it. Especially for government projects, good quality products, flexible payment terms, fast delivery time, and good after-sales service are very important for people who want to know them. Now, let us discuss what can we do for after-sales service about solar led street lighting？
1. Global Market
(Overview & Adoption)
As we know, solar energy is very hot and popular in the recent 10 years. More and more countries and people realize we need renewable energy products to protect our world. So, some renewable energy products like solar panels, solar led street lights, wind turbines, hydroelectric dams, geothermal systems, and biomass technologies are expanding globally. According to industrial tracking data from the Fortune Business Insights Solar Street Lighting Market Report, the global market size was valued at $12.23 billion in 2025 and is projected to expand rapidly.
We can see that solar led street lights are popular in many countries. Based on global adoption data, the table below outlines regional features and focus areas:
1.1 Regional Features
(Solar LED Street Lights )
| Country | Features of Solar LED Street Lights |
|---|---|
| United States | Energy-efficient, smart controls, various designs for urban and rural areas |
| India | Affordable, easy installation, robust for harsh weather, government-supported |
| China | High-tech solar panels, integrated smart systems, large-scale production |
| Germany | Advanced technology, high-quality materials, emphasis on sustainability |
| Australia | Durable for extreme weather, remote area suitability, low maintenance |
| South Africa | Cost-effective, improved safety in communities, easy to install |
| Brazil | Energy-saving, integration with urban planning, focus on public safety |
| Japan | Compact designs, advanced solar technology, emphasis on energy conservation |
| United Kingdom | Smart city integration, customizable lighting, eco-friendly materials |
| Canada | Cold-weather performance, low energy consumption, reliable in remote areas |
| France | Aesthetic designs for urban areas, energy-efficient, smart lighting solutions |
| Mexico | Affordable solutions, energy independence, improved public safety |
| Nigeria | Robust for local conditions, low-cost installation, enhances community safety |
| Thailand | Flexible installation, energy-efficient, promotes tourism in public areas |
| Indonesia | Suitable for tropical climates, low maintenance, enhances rural infrastructure |
2. Technical Questions
(from EPCs and Governments)
When some EPCs or governments purchase solar led street lights, there are some questions they encounter before building trust:
- What are the benefits of using solar LED street lights?
- How do solar LED street lights work?
- What features do solar LED street lights typically have?
- Which countries are leading in the adoption of solar LED street lights?
- What factors influence the installation of solar LED street lights?
- How do solar LED street lights compare to traditional street lights?
- What maintenance is required for solar LED street lights?
- How do solar LED street lights perform in different weather conditions?
- What is the average lifespan of solar LED street lights?
- Are there any government incentives for installing solar LED street lights?
- What after-sales services are offered with the purchase of solar LED street lights?
- How can customers access support or replacement parts after installation?
We can know that we need to solve many questions so that clients can trust us. Guided by international protocols such as the IEA Photovoltaic Power Systems Programme (IEA-PVPS) Stand-Alone Guidelines, we will make a case to show how we solve after-sales service of solar led street lights.
3. Field Case Study:
(Sungreat Energy Project in the Philippines)
In December 20, 2024, Sungreat Energy finished a project with CGAM in Davao and General Santos City, Philippines. The complete project timeline and supply/installation breakdown is as follows:
| Project Parameter | Engineering & Supply Details |
|---|---|
| Model Type | BK Integrated Solar Streetlight Series |
| Location | General Santos City & Davao Region, Philippines |
| Quantity & Supply Scope | 1,250 Sets of All-in-One Solar LED Streetlights |
| Model Information | 120W Integrated Solar Streetlights, 12.8V 36Ah LiFePO4 Battery, 150W Polycrystalline Solar Panel |
| Pole Height & Specification | 8 to 10 Meters Height, Hot-Dipped Galvanized with Anchor Bolts and Heavy-Duty Flange Base Plate (Anti-Rust and Anti-Corrosion) |
| Lighting Spacing & Dialux | 30 to 35 Meters Spacing (Dialux Photometric Study designed for optimal lux distribution and road uniformity) |
| Working Mode | 2 Hours 100% Brightness + 4 Hours 70% + 3 Hours 50% + 3 Hours 50% |
| Autonomy & Protection | 3 to 5 Rainy Days Backup Autonomy, IP66 Water & Dust Proof Rating |
| Project Duration | Project Initiated Nov 2024 & Fully Installed/Commissioned by Dec 20, 2024 (~1.5 Months Total Duration) |
We finished this project from initial discussions in November 2024 to complete installation before December 20, 2024. During this timeframe, we confirmed CAD drawings, Dialux lighting calculations, pole structural requirements, installation logistics, shipment schedules, payment terms, and working modes to ensure smooth execution without operational ambiguity.
3.1 The Challenge
(Step-by-Step Diagnostics)
Unfortunately, after 3 months of continuous operation, a few units encountered functionality issues. To be honest, while we aim for a defect rate under 0.212% for bulk orders, environmental challenges can happen. What matters most is giving swift, positive support. We instructed the local team to follow these steps:
- Check if solar panel is charging fully or if it has been rainy recently.
- If not, test if the battery can work by measuring voltage and current.
- Take pictures and videos for our technical engineers to analyze.
- Swap the battery or panel with spare parts to identify the failed component.
Since on-site diagnostics can be complex for clients, we decided to visit the Philippines in April 2025 to inspect the installation directly and resolve any outstanding issues.
3.2. On-Site Action
(Root Cause Resolution)
Our engineering team traveled across the Philippines from March 27 to April 10, 2025 (covering Manila, Cebu, Iloilo, Davao, and General Santos City). On site, we accessed the lights mounted on the 8 to 10-meter galvanized poles, opened the housing, and thoroughly inspected the internal components including the LiFePO4 battery, PV panel, motion sensor, MPPT controller, and wiring harnesses.
Our investigation revealed that extreme local high temperatures caused chemical breakdown in a small batch of battery cells—a known environmental degradation factor documented in IEA-PVPS Task 13 Component Reliability Studies. Replacing the affected batteries immediately restored full functionality, confirming our diagnosis.
4. Troubleshooting Guide
| Phenomenon | Cause | Inspection Methods | Solution |
|---|---|---|---|
| Lights do not work. | Switch turned off | Check whether the switch is in the “ON” position. | Turn on the switch. |
| Switch failure | Bypass/short-circuit the switch. If light turns on, the switch is faulty. | Replace the switch. | |
| Battery depleted | Long rainy period or shaded installation prevented charging. Disconnect battery and measure voltage with a multimeter. If voltage < 11V, battery is deeply discharged. | Allow solar panel to charge battery during the day with switch turned off at night. 2 days of sun will restore full charge. | |
| LED failure | Supply 9V DC (<1A) directly to LED module terminals. If it fails to illuminate, the module has failed. | Contact support for LED module replacement. | |
| Short lighting time | Low battery charge | Dust, leaves, or debris covering the solar panel. Measure battery voltage (<11V indicates insufficient charge). | 1. Clean solar panel surface. 2. Charge under sunlight for 2 days with light switched off. |
| Battery failure / Aging | 1. Inspect battery casing for physical swelling or damage. 2. Check if operational lifespan exceeds 2–3 years. |
1. Replace units damaged during transit. 2. Purchase replacement battery pack if unit reached end-of-life. |
|
| No motion sensing | Sensor failure | Approach fixture within detection range during low-power mode. If brightness does not jump to 100%, sensor/controller is faulty. | Return controller/sensor module for repair or replacement. |
| Flashing light | Controller setting error | Intelligent power control triggered due to excessive output or incorrect controller programming. | Reset controller settings or request factory controller replacement. |
5. Conclusion
(About Sungreat Energy)
Identifying issues, performing rigorous inspections, analyzing root causes, and executing prompt technical solutions reflect the core commitment of Sungreat Energy. We remain dedicated to providing premier support, complete after-sales service, and end-to-end solar street lighting solutions worldwide.
5.1 Introduction to Sungreat Energy
Welcome to Sungreat Energy! We are a passionate leader in innovative solar solutions, dedicated to transforming the way communities harness renewable energy. Our mission is to provide sustainable and efficient energy alternatives that empower individuals and enhance public spaces.
At Sungreat Energy, we specialize in high-quality solar products, including solar street lights, solar panels, and energy storage systems. Our cutting-edge technology ensures maximum efficiency and durability, making it easier for communities to transition to clean energy sources.
With a strong commitment to environmental sustainability and energy independence, we aim to reduce carbon footprints and promote a greener future for all. Join us in illuminating communities and creating a brighter tomorrow with Sungreat Energy!
For project inquiries and technical support, feel free to reach out:
- Email: [email protected]
- WhatsApp: +86 157 7646 7829
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