Laboratory Testing Process and Strict Quality Control for SOTTLOT’s Solar Luminaires

Amid growing global awareness of renewable energy and environmental protection, solar lamps have gained popularity in the lighting industry for their energy-saving and eco-friendly qualities. As a leading solar luminaire manufacturer, SOTTLOT upholds rigorous standards in quality control and performance monitoring. The company is committed to providing high-quality, stable solar lighting solutions through a persistent focus on product quality and technical performance. This strict quality control process not only ensures reliable products but also guarantees value for global B2B customers, making SOTTLOT a trusted partner in the international market.

1.Rigorous Laboratory Testing Process
To ensure each solar lamp functions reliably across various usage scenarios, SOTTLOT implements a meticulous testing process at every stage of product development and production. The main stages of this process are as follows:

• • 1.1 Solar Panel Testing
    The efficiency of a solar luminaire depends on the panel’s ability to convert light into energy consistently under different weather conditions. SOTTLOT conducts the following tests on each solar panel:

    • Short-circuit (VOC) and Open-circuit Current (ISC): These tests measure the panel’s output current under extreme conditions to prevent power shortages during use.
    • Maximum Power Current and Voltage Test (VM, IM): This test checks the panel’s output at maximum power to ensure optimal performance. SOTTLOT adheres to international standards, such as IEC60904-9, keeping error margins within -2% to maximize power generation efficiency.

  • 1.2 Battery Performance Test
    As a core energy storage component, battery performance affects the service life and stability of solar lights. SOTTLOT tests each battery’s polarity, internal resistance, and capacity consistency:

    • Polarity Test: Ensures positive and negative terminals are clearly marked to prevent misconnection during installation.
    • Internal Resistance and Capacity Test: Controls voltage error within 5mV and internal resistance within 3mΩ, ensuring consistent charging and discharging performance.

  • 1.3 Hardware Salt Spray and Adhesion Test
    Hardware materials impact the durability and corrosion resistance of solar lamps. SOTTLOT conducts the following tests:

    • Salt Spray Test: Exposes hardware to salt spray with a specific pH for 24 hours to assess corrosion resistance, ensuring suitability for coastal and humid environments.
    • Hundred-Gram Knife Test: Cuts a 1mm square on the product’s surface and uses tape to test coating adhesion. Delamination must be less than 5% to ensure durability.

  • 1.4 Fire and Moisture Resistance Test for Plastic Components
    High-quality plastic components are essential for fire and moisture resistance. SOTTLOT rigorously tests these aspects to ensure the products’ stability in challenging conditions.

  • 1.5 PCB Performance Test
    The PCB is critical to the electrical system. SOTTLOT uses specialized equipment to test circuit integrity, including current and voltage stability, ensuring reliable operation under extreme temperatures and long-term usage.

2.Quality Control Process
From raw materials to finished products, SOTTLOT enforces strict quality control at every step to maintain high standards.

• • 2.1 IQC (Incoming Quality Control)
    During incoming material inspections, each batch undergoes appearance, size, and performance tests. This ensures raw materials meet design specifications, reducing defective product rates and ensuring a strong foundation for production.

  • 2.2 IPQC (In-Process Quality Control)
    IPQC monitors production in real time, verifying processes such as PCB soldering and plastic heat treatments. Multiple inspections during production ensure each stage aligns with company standards.

  • 2.3 OQC (Outgoing Quality Control)
    Finished products undergo final checks before shipment, including functionality, packaging integrity, and appearance. OQC ensures the products remain in perfect condition during transport, with moisture-proof and drop-resistant packaging.

3.Technical Support and Advanced Equipment
SOTTLOT invests significantly in advanced testing equipment to ensure accuracy and consistency in test results, including:

• • Simulated Sunlight Testing: Tests power generation and performance under varying light intensities.
  • Constant Temperature and Humidity Testing: Ensures stability in high and low temperatures, particularly for batteries and PCB components.
  • Salt Spray Testing: Assesses corrosion resistance of hardware for suitability in coastal or industrial environments.
  • Multi-Channel Data Recorder: Monitors real-time current, voltage, and temperature of batteries and circuits for sustained performance.

4.Strict Adherence to International Standards
As a global supplier, SOTTLOT adheres to international quality standards. Certifications like ISO9001 and ISO14001 validate the company’s commitment to quality and environmental responsibility. Compliance with IEC and CE standards in production and testing ensures products meet regulatory requirements across various markets, enhancing competitiveness and brand credibility.

As a leader in the solar lighting industry, SOTTLOT prioritizes quality and standards. Through rigorous testing and scientific quality control processes, the company delivers solar luminaires that are energy-efficient, eco-friendly, stable, and durable. SOTTLOT offers high-performance products backed by a deep understanding of customer needs. With accurate testing and strict quality control, SOTTLOT’s products exceed industry standards for reliability and safety, providing sustainable solutions for a brighter future. The company will continue investing in quality and innovation, contributing to the advancement of renewable energy globally.