Features ' High-efficiency solar cells with an isotropically etched surface ' Silicon nitride antireflection coating ' Silver front contact bars and full-surface aluminum back contact field Production and Quality Control ' Proper handling from incoming inspection through production, outgoing inspection and packaging ' 100% tested with +/ -3% test accuracy ' 100% checked for reverse current and visual appearance ' Calibration by Fraunhofer ISE Packaging ' Special design minimizes the risk of cell damage ' Label with product information Specifications subject to changes without prior