NOVELTY - The manufacturing method involves cutting a hole (7) in the first sheet (2) to accommodate a photovoltaic solar collector module (8), inserting the solar collector module into the cut-out hole, sealing the solar collector module to first sheet, and providing a second sheet (3) having an opening for receiving a connector housing (22). The electrical connections are led from solar collector module through the connector housing. An insulating body (4) is provided between the inner face of second sheet and inner face of first sheet and inner face of photovoltaic solar collector module.    USE - Manufacturing method for composite insulating panel used in roof assembly (all claimed).    ADVANTAGE - Provides manufacturing efficiencies and ensures that maximum practical amount of the face of panel exposed to sunlight is covered by photovoltaic material by providing large amount of photovoltaic material. Ensures no additional work is required on site since panel is fitted in exactly the same manner as conventional composite panel by incorporating the photovoltaic material as part of the manufacturing process. Ensures safe working environment and reduces cost considerably as safety barriers such as roof edge protectors are not required since no roof access is required for electrical interconnection on site by integrating the connector into the panel during manufacture. Ensures saving cost and time since electrical connection is done at the same time as the building electrical fit out. Reduces material and labor costs since there is no risk of wire fouling during roof maintenance and no external cable trays are required. Ensures no roof access is required since interconnection maintenance is facilitated from the inside of building. The manufacture transportation and packaging costs are minimized as the manufactured panel is transported as single unit since photovoltaic panel is integrated. The unit is robust but light in weight since frames are not required to mount the photovoltaic panel. Ensures less fixing penetration required on the roof and total system is fully guaranteed. Obtains maximum solar efficiency by covering the south facing portions of the building with roof panels.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a composite insulating panel.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of the panel.    First sheet (2)    Second sheet (3)    Insulating body (4)    Hole (7)    Photovoltaic solar collector module (8)    Connector housing (22)