Full size silicon heterojunction solar cells (SHJ) made on the pilot line at CEA-INES reach efficiencies () around 24.5% . However, photoluminescence pictures of such cells reveal that the cell edges are the site of a significant recombination activity . Therefore, mitigating recombination at the edges can in principle represent an interesting path to unlock higher . This challenge is all the more important for cells with a high perimeter/area ratio and/or cut edges, such as half-cells  and shingled cells  obtained from cut full size cells. For such technologies, 1) the edges resulting from cutting are cleaved while 2) the remaining edges typically feature a gap where TCO is missing due to TCO masking. To our knowledge, cell edge effects for different SHJ cell configurations (full, half or shingled) have been little addressed, are poorly understood, and guidelines for efficient edge treatment are therefore still missing.