... cell.156*156mm,poly solar cell. 1.Grade A ,efficiency:16%-18% 2.Stable performance.Long term ... 18%Wafer thickness:0.220+/-0.030mm 1) A grade poly solar cells,solar wafer,solar panels, ... BSF 3) Specification EfficiencyEffciencyPmax(W)AverageImpp(A)Vmpp(V)Isc(A)Voc(V)172017.20-17.40>4 ... tell me . contact person :Cathy 2013 High Efficiency A grade 156mm x156mm 6" 2BB/3BB Polycrystalline Solar Cell, ...