NOVELTY - The panel (1) has an external sheet (2) and an internal sheet (4). An insulating foam (5) is provided between the external sheet and the internal sheet. The external sheet has longitudinally extending raised projections (30, 31) that are provided at both the sides of panel. A substantially flat portion (32) of the external sheet is extended between the raised projections. A photovoltaic solar collector sheet (10) is laminated to the external surface of the flat portion of the external sheet.    USE - Composite insulating panel such as roof panel for roof assembly (all claimed) of building. Can also be used in wall panel and floor panel of building.    ADVANTAGE - As the flat portion is extended completely between the raised projections, the area to which photovoltaic material is provided and exposed to sunlight can be effectively maximized. Thus the solar energy collecting efficiency of the panel can be enhanced and the panels can be easily manufactured. The flat portion preferably does not have any indentations or raised areas. Thus the use of longitudinally extending micro-ribs on the exposed face of the external sheet can be avoided. The electrical interconnection is internal and not exposed to weathering. Thus the safe working environment can be ensured. The risk of wire fouling during future roof maintenance can be avoided. No external cable trays are required. Thus the material and labor costs can be reduced. The interconnection maintenance can be facilitated from the inside of the building.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for manufacturing composite insulated panel with photovoltaic solar collector sheet.    DESCRIPTION OF DRAWING(S) - The drawings show a perspective view and an exploded view of the panel.    Composite insulating panel (1)    External sheet (2)    Internal sheet (4)    Insulating foam (5)    Photovoltaic solar collector sheet (10)    Raised projections (31,31)    Flat portion of external sheet (32)