The interconnection of solar cells by shingling increases the active cell area in photovoltaic modules. Cell-tomodule (CTM) gains and losses change significantly. We present models to calculate these gains and losses for shingled cells. Module efficiency and power can be increased with the shingle interconnection technology by +33 Wp and +1.86% abs in the analyzed design, when compared to common ribbon-based interconnection. While the CTM-ratio for efficiency improves due to shingling, the CTM-ratio for power is lower than for conventional modules with ribbon or wire cell interconnection.

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A versatile interconnection and receiver concept for back contact low concentrating crystalline solar cells is pre sented. The key feature is the AP-C-MWT cell [I] which allows for any cell formats as a multiple of 22.5 x 10 mm 2 • We demon strate the feasibility of an adequate receiver concept and show the electrical optimization steps for a given concentration. The steps include the electrical finite-element-method (FEM) simula tion of the interconnector conductivity and an analytical model to derive the optimal geometric design. Finally measured efficiency data for a built prototype are reported, showing a receiver effi ciency based on string area of 19.2% (C=9.9) and a cell to receiv er efficiency of 99.3% I ndex Terms -back contact cells, solar cell interconnection, silicon concentrator cells, concentrator photovoltaic receiver, LCPV.

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