A grade 156mm x156mm 6" 2BB/3BB Polycrystalline Solar ... etc SpecificationsSolar cell.156*156mm,poly solar cell. 1.Grade A ,efficiency:16%-18% 2.Stable performance.Long term stability ... 18%Wafer thickness:0.220+/-0.030mm 1) A grade poly solar cells,solar wafer,solar panels,good quality ... ,tell me . contact person :Cathy 2013 High Efficiency A grade 156mm x156mm 6" 2BB/3BB Polycrystalline Solar Cell,multi ...