Silicon solar cell production line and key performance indicators: A case of study at front size serigraphy stage

•A frontal serigraphy design has been developed for silicon solar cell power enhancement.•The new finger design allows an excellent surface management.•Laminated unit power and cell to module ratio are the selected key performance indicators for cell and module devices respectively.•Laminated unit power shows a power increase from 3.95 W to 4.20 W directly related with frontal serigraphy design.•Cell to module ratio for [4.30–4.35) W cell range indicates a decrease from 7.7% to 6.5%.