HTceramix has its own unique stack based on its SOFConnex™ technology and HTc cells. All of HTc’ stack designs enable a high compactness of the whole stack achieving a power density of up to 1500 W/L. Stack tests have shown homogenous behaviour of cells in polarization cycles and OCVs exceeding one volt/cell. The use of the SOFConnex™ structure improves the thermal cycling tolerance of the stack, avoiding additional performance degradation during complete cycling.