One embodiment relates to a photovoltaic (PV) apparatus. The PV apparatus includes a plurality of photovoltaic modules arranged in an array and attached to a support structure which is attached to a roof. Each of the photovoltaic modules comprises a plurality of photovoltaic cells. A first array-roof integration member is attached to a first side of the array. The array-roof integration member covers a gap between the first side of the array and the roof. Another embodiment relates to a method of installing a photovoltaic apparatus upon a sloped roof. Another embodiment relates to a kit for mounting a photovoltaic apparatus on a roof. Other embodiments, aspects and features are also disclosed herein.