Shingled Cell

Shingled cell panels use strips of solar cells that overlap like roof shingles, with each strip's edge layered beneath the next and connected using electrically conductive adhesive (ECA) instead of traditional ribbon soldering and busbars.

This design eliminates the gaps between cells and removes the visible busbars (metal grid lines) that cause shading losses on conventional cells. The result is more active cell area packed into the same module footprint, boosting power density and overall module efficiency.

Shingled panels can achieve 5% to 10% more power output per square meter compared to standard half-cut cell designs. The overlapping connections also create a more robust cell-to-cell bond and reduce hot-spot risk.

The internal wiring topology of shingled panels provides inherent shade tolerance. The strips are typically connected in a parallel-series configuration that isolates shaded sections, allowing unshaded strips to continue producing power independently.

Several manufacturers including SunPower (Maxeon), Yingli, and Seraphim produce shingled cell panels. The technology is growing in popularity for residential applications where maximizing watts per square foot of available roof space is the primary concern.

One consideration with shingled panels is the long-term durability of the conductive adhesive bonds. Traditional soldered connections have decades of field data proving their longevity. ECA bonds in shingled panels are newer, and while accelerated testing is promising, the oldest shingled panels in the field are still relatively young compared to the 25-30 year warranties they carry. Manufacturing quality control is particularly important for shingled designs because adhesive bond failures are harder to detect and repair than solder joint issues.