Longi High-Quality Positive a-Grade 550W Solar Panels All Black

1.100% fully automatic production line,ensuring 100%in-line inspection on the production line. Effectively avoiding the risk of hidden cracks and inherent defects.improving efficiency, reducing manual errors,precision welding,and maintaining uniform product quality standards.
2.First-class photovoltaic testing center, up to 38 valid tests and experiments to ensure product quality.
3.High, medium and low current classification to improve system output performance.
4.Two EL tests before and after.12-focus EL to overcome depth-of-field differences,spatial resolution of 0.4-0.5mm high and low currents are tested separately, with zero tolerance for quality risks.
5.Long-term reliability testing.The PV testing center follows the standard of 3 times thousand conventional tests to guarantee the longer life cycle of the modules.

1. Q: Why choose we?
A: 12-year product materials and workmanship warranty and 25-year linear power output warranty.
B: Anti-PID (Potential Induced Degradation) performance and rigorous EL testing.
C: Excellent low light power generation performance and fully automated component production line.

2. Q: Can I have my own customized product?
A: Yes, our customized requirements for logo, design, outer package are available.

3. Q: What certificates do you have?
A: Our solar products have got ISO (International Standardization Organization), CQC (China Quality Certification), CE (Council of Europe) and TUV (Technischen Uberwachungs Vereine).

4. Q: Can the price of solar products be cheaper?
A: Of course, you will be offered a very good discount with large quantities.