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Sunman Flexible Solar Panel 520W Monocrystalline Flexible Solar Panel for RV Marine and off Grid Solar Systems. 25-Year Power Warranty: Includes 10-year product warranty and 25-year linear output power guarantee. High Efficiency Cells: 144 monocrystalline silicon cells with 19.2% module efficiency. Flexible Design: Ultra-thin 2mm thickness allows installation on curved surfaces. Fast Sample Delivery: Sample orders shipped within 7 days for quick evaluation. Bulk Order Speed: Bulk orders delivered within 15 days during off-peak seasons. 24/7 Expert Support: Professional engineering team available 24 hours online. Global Certifications: Certified by ISO, CE, and TUV for international safety standards.