NOVELTY - Solar cell apparatus (A1) comprises: a solar cell panel (100); a protective substrate (200) formed on the solar cell panel so that a step difference is formed between the protective substrate and the solar cell panel; and a sealing member (400) at a lateral side of the solar cell panel and on a bottom surface of the protective substrate.    USE - Used as solar cell apparatus.    ADVANTAGE - The solar cell apparatus: utilizes the buffer sheet that has improved optical characteristic and transmittance higher than that of the sealing member; utilizes the sealing member that prevents moisture penetration and degradation of the apparatus, thus exhibiting improved efficiency; and exhibits improved reliability and durability.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a solar cell apparatus (A2) comprising a protective substrate including a central region and an outer region surrounding the central region, a solar cell panel disposed in the central region at a bottom surface of the protective substrate, and a sealing member surrounding a lateral side of the solar cell panel and disposed in the outer region; and    (2) a solar cell apparatus (A3) comprising a protective substrate, a solar cell panel under the protective substrate, a buffer sheet (300) interposed between the protective substrate and the solar cell panel, and a sealing member disposed at a lateral side of the solar cell panel, on a bottom surface of the protective substrate and between the solar cell panel and the protective substrate, where an outer portion of the solar cell panel is located inward with respect to an outer portion of the protective substrate, and an outer portion of the buffer sheet is located inward with respect to the outer portion of the solar cell panel.    DESCRIPTION OF DRAWING(S) - The figure shows a sectional view of the solar cell apparatus.    Solar cell panel (100)    Protective substrate (200)    Buffer sheet (300)    Sealing member (400)    Horizontal surface (420)