Look for "Verified" or "Gold" badges, but cross-reference them with official Chinese records like the National Enterprise Credit Information Publicity System.
Tongwei Solar dominates polysilicon and cell production, often providing highly competitive pricing due to deep vertical integration. 2. Sourcing Platforms & Verification
While platforms like Alibaba, Made-in-China, and Global Sources are standard starting points, verification is critical:
A 40-foot High Cube container (holding ~800–1,000 panels) typically costs $3,500–$7,500 for sea freight, depending on the destination.
LONGi Solar , JinkoSolar , Trina Solar, and JA Solar consistently lead in shipment volume and efficiency.
Never place a bulk order without a sample. Conduct a Flash Test to verify power output and an EL (Electroluminescence) test to find micro-cracks invisible to the eye.
Always request quotes on a $/Watt basis to standardize comparisons across different panel sizes.
Attending events like the SNEC PV Power Expo in Shanghai or the Canton Fair allows for direct factory vetting. 3. Pricing and Logistics