NOVELTY - The photovoltaic device comprises a three-dimensional multi-layered photovoltaic cell assembly (101), a body portion (200), relieving features, an interconnecting structural member, a connector assembly component, and an intermediate layer. The photovoltaic cell assembly: is in a form of a panel; includes a top surface, a bottom surface, a peripheral edge, and electrical connector assemblies with a connector housing; and comprises a barrier layer (122) with a barrier coefficient of linear expansion (CLTE) and a photovoltaic cell layer (110) disposed inboard of a barrier layer peripheral edge.    USE - The photovoltaic device is useful in building structures such as roofing shingles or exterior wall coverings.    ADVANTAGE - The cost-effective photovoltaic device exhibits high performance, increased durability and dimensional stability, long lifespan, improved resistance to moisture, warping, fading and wind loading, and enhanced water sealability, and can be easily installed in the roofing shingles or exterior wall coverings without any damage.    DETAILED DESCRIPTION - The photovoltaic device comprises a three-dimensional multi-layered photovoltaic cell assembly (101), a body portion (200), relieving features, an interconnecting structural member, a connector assembly component, and an intermediate layer. The photovoltaic cell assembly: is in a form of a panel; includes a top surface, a bottom surface, a peripheral edge, and electrical connector assemblies with a connector housing; and comprises a barrier layer (122) with a barrier coefficient of linear expansion (CLTE) and a photovoltaic cell layer (110) disposed inboard of a barrier layer peripheral edge. The body portion: partially surrounds a portion of the top surface and peripheral edge of the photovoltaic cell assembly; is adapted to allow elastic deformation of the photovoltaic device over a temperature range; and comprises a body material with a body CLTE, a body lower surface portion, a body upper surface portion and a body side surface portion. The relieving features: are partially disposed in the body portion between the barrier layer and the housing of the electrical connector assemblies, disposed on the barrier layer (15 mm) of the photovoltaic cell assembly along a top peripheral edge (50%) and disposed on a top peripheral edge (5 mm) of the connector housing; comprise the barrier layer divided in two pieces with a relieving elastomeric barrier placed between each piece, a partial thinning of the body portion disposed between a corner of the connector housing and a rounded barrier perimeter corner, and a localized thinning of the body portion; and include an elastomeric filling material. The housing has an outer surface. The electrical connector assemblies are: disposed on opposite sides of the photovoltaic cell assembly; partially embedded in the body side surface portion; in electrical communication with the photovoltaic cell layer. The localized thinning has a depth of 50 % that of a depth of the photovoltaic cell assembly. The barrier layer comprises a glass with a thickness of 1.0-5.0 mm, and includes a barrier lower surface portion, a barrier upper surface portion, and a barrier side surface portion. The barrier side surface portion spans between the upper and lower surface portions with a barrier profile located between the upper and lower surface portions and a barrier perimeter spanning about the barrier layer and forms the barrier layer peripheral edge. The body side surface portion spans between the upper and lower surface portions, and forms a body peripheral edge. A portion of the body portion abuts to a segment of the barrier layer peripheral edge at an interface region. A segment of the barrier layer of the peripheral edge that abuts the portion of the body portion has rounded barrier perimeter corners. The connector assembly component includes a connector assembly lower surface portion, a connector assembly upper surface portion, and a connector assembly side surface portion. The connector assembly side surface portion spans between the upper and lower surface portions, and forms a connector assembly peripheral edge. The connector assembly peripheral edge is closest to the interface region, and has a rounded connector corner. The intermediate layer: comprises a layer material; has a layer elastic modulus value, a layer ultimate elongation value, a layer coefficient of thermal expansion value and a layer strength value; and is partially disposed between the photovoltaic cell assembly and a body portion assembly.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a photovoltaic device.    Photovoltaic cell assembly (101)    Photovoltaic cell layer (110)    Barrier layer (122)    Supplemental Barrier Sheet (130)    Body Portion. (200)