(a) Side view of connection scheme of two cells as used for modules K1 and K2 (not to scale). (b) Back side of module K1 before lamination. At the ends of the module solar ribbon was soldered to the cells. (c) Side view of connection scheme of two cells as used for modules K3, K4 and K5 (not to scale). (d) Back side of module K4 before lamination. The insert in the lower right corner shows contact strips with embossing.