Roofing and siding products having receptor zones and photovoltaic roofing and siding elements and systems using them

A kit for the installation of a photovoltaic roofing or siding system, the kit comprising:

• a plurality of photovoltaic elements;
• and
• a plurality of roofing or siding products each comprising a rigid roofing or siding substrate having a top surface, the top surface having one or more receptor zones and one or more areas adjacent the one or more receptor zones, each receptor zone being adapted to receive one or more of the photovoltaic elements, each receptor zone being defined by having a different surface material than the surface of the one or more areas adjacent the one or more receptor zones, having a different surface texture than the surface of the one or more areas adjacent the one or more receptor zones, or by being recessed from the surface of the one or more areas adjacent the one or more receptor zones, wherein no photovoltaic element is affixed in the one or more receptor zones.