Redundant cell connections keep current flowing
SunPower Performance panels mitigate the impacts of cell
cracks on power output by creating flexible paths for
continuous electricity flow. The approach ensures there is no
single point of failure throughout the panel (figure 6). In a
conventional cell, cracks can propagate until reaching
another crack or the ribbon of the cell. As cracks form
throughout the cell, they inhibit the flow of current to the
conductive ribbons. In the case of the shingled cell
Performance panel, the shorter cell length limits the
propagation of cracks, isolating cracks to a smaller area of
the cell. The highly redundant ECA connections act as a
“mesh” to maintain current flow.
Figure 6: Not only are the smaller cells of the SunPower Performance panel less susceptible to breakage, but they confine cracks to a
smaller portion of the panel, while maximising energy generation through a series of redundant electrical connections.
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