How to assess the electrical quality of solar cell interconnection in shingle solar modules

Abstract This work deals with the resistance induced by interconnecting shingle solar cells means of an electrically conductive adhesive (ECA), which is labeled R int throughout work. A new approach to measure directly from joints actual strings presented and evaluated. For non‐laminated two different ECAs that are applied as a continuous line on shingles edge length 158.75 mm, similar interconnection ≈ 2.5 mΩ found. In full‐size module, such would result in cell‐to‐module loss around Δ P MPP = −0.8%. Another aspect present increase awareness case unknown, it not trivial assess electrical quality (of ECAs, amounts same ECA, etc.). It demonstrated experimentally string/module fill factor can be highly sensitive current mismatch thus ideal representative . The power at maximum point tends indicate differences even less clearly. By simulating virtual pool slightly varying I – V curves, shown more suitable quantity derived string's/module's dark curve.