WARRANTY & GUARANTEE. Linear output power guarantee. 12 years: 91.9% power output, 30 years: 82.1% power output. WITHSTAND STRONG. Snow load 5400Pa. Wind load 2400Pa. TWO-SIDED BENEFITS. High efficiency solar cells. Effective working area of both sides >75%, with significant power insurance. Capture more sunlight and turn it into electricity. R&D AND PRODUCTION. Advanced production line. The leading solar cell cutting process and multi busbar design with SUNPRO Technology. HIGH EFFICIENCY. Efficiency can reach 21.57%. Excellent low light performance. Higher power output under the conditions of haze, overcast, etc.