NOVELTY - The photovoltaic assembly (100) comprises a frameless photovoltaic module (104) comprising a frontside sheet and a backside sheet, a mounting structure (102) comprising two rails that is present in contact with the backside sheet, an adhesive material (106) distributed between the backside sheet and each of the two rails and configured for mechanically attaching the backside sheet and the two rails after the adhesive material is cured, a retainer (108) that is attached to the mounting structure, and a second frameless photovoltaic module positioned on the mounting structure.    USE - The photovoltaic assembly comprising frameless photovoltaic module such as solar modules or panels is useful on rooftops and pole tops.    ADVANTAGE - The photovoltaic assembly comprising photovoltaic module can be easily installed on the mounting structure with improved operating life and reduced coefficient of thermal expansion, exhibits improved esthetic or functional features, and prevents light interference by the retainer head.    DETAILED DESCRIPTION - The photovoltaic assembly (100) comprises a frameless photovoltaic module (104) comprising a frontside sheet and a backside sheet, a mounting structure (102) comprising two rails that is present in contact with the backside sheet, an adhesive material (106) distributed between the backside sheet and each of the two rails and configured for mechanically attaching the backside sheet and the two rails after the adhesive material is cured, a retainer (108) that is attached to the mounting structure, and a second frameless photovoltaic module positioned on the mounting structure with the adhesive material distributed between the mounting structure and the second frameless photovoltaic module. The retainer: supports the frameless photovoltaic module and the second frameless photovoltaic module on the mounting structure during curing of the adhesive material; is interlocked with one of the rails; exerts a force on the frontside sheet; comprises UV-degradable plastics, water soluble plastics, a flexible edge to bend during the installation of the retainer and to exert a force onto the mounting structure after the installation, and a spacer that extends between the backside sheet and the mounting structure and controls a thickness of the adhesive materials distributed between the backside sheet and each of the two rails; forms a channel to snugly fit around the edge of the frameless photovoltaic module; and is present in contact with the adhesive material. The frontside sheet and/or backside sheet are flexible and are a glass sheet. An external surface of the frontside sheet does not contact any metallic components of the mounting structure. The frameless photovoltaic module comprises a feature configured for engaging with the retainer, and interconnected copper indium gallium selenide cells, and is present at an angle of greater than 15 degrees relative to horizontal. The adhesive material is a fast-setting two-component adhesive and a UV-stable adhesive. The backside sheet is pre-treated to improve its bonding to the adhesive material. The two rails comprise a U-shaped channel. An INDEPENDENT CLAIM is included for a method of installing a frameless photovoltaic module.    DESCRIPTION OF DRAWING(S) - The diagram shows a side schematic view of a photovoltaic assembly including a photovoltaic module.    Photovoltaic assembly (100)    Mounting structure (102)    Frameless photovoltaic module (104)    Adhesive material (106)    Retainer. (108)