Performance Rated power (Pmax) : 245~200W Power tolerance : 0~3% Nominal voltage : 24V Limited Warrant : 30 years 1. Warrant : Power output for 30 years (90% of minimum output power per 10 years, 80% of minimum output power per 30 years). Freedom from defects in materials and workmanship for 10 years. 2. These data represent the performance of typical SM-XXXPA8 Series products, and are based on measurements made in accordance with ASTM E1038 corrected to SRC (STC) - See more at: http://www.bestmadeinkorea.com/product-4871/Power-Generation-Lighting/PV-Module-overseas-.html#sthash.LM9UGR0D.dpuf