Abstract: The invention is a photovoltaic window panel comprising a parallel array of strips of photovoltaic cells incorporated within the body of a transparent panel such that the active area or surface plane of a photovoltaic cell is nearly perpendicular to the plane of the transparent panel. The narrow strips of photovoltaic cells are inserted into slots formed in the transparent panel with the strips encapsulated within the slots with a clear potting material. The slotted panel containing the strips of photovoltaic cells is protected by lamination with a clear protective cover. Alternatively the strips of photovoltaic cells may be molded into a panel of transparent material. The electrical outputs of each strip of photovoltaic cells emerge from the two side edges of the transparent panel so that the strips of photovoltaic cells may be connected in parallel or in series to contacts external to the photovoltaic window panel.