TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Apparatus: In the photovoltaic-thermal hybrid apparatus above, the frame of each photovoltaic-thermal module is connected to the frames of the neighboring photovoltaic-thermal modules. The channel of each photovoltaic-thermal module is directly connected to the channel of at least one neighboring photovoltaic-thermal module. The photovoltaic-thermal hybrid apparatus further comprises a connection member to connect the channel of each photovoltaic-thermal module to the channel of at least one neighboring photovoltaic-thermal module. Each photovoltaic-thermal module is formed in a rectangular shape, and each photovoltaic-thermal module is provided at at least one corner of the frame thereof with a connection to interconnect the neighboring photovoltaic-thermal modules. The connection comprises at least one pair of connections disposed at opposite corners of each photovoltaic-thermal module. The channel has first and second openings formed at opposite ends thereof, and the first and second openings are disposed at the connections, respectively. The first and/or the second opening are flexible. Additionally, the connection comprises an opening and closing part to open and close the connection. Opening and closing part comprises an elastic member to provide an elastic force in a direction to close the connection. The at least one condenser changes a direction of some incident solar energy in a radial direction and emits some incident solar energy outside. The photovoltaic-thermal hybrid apparatus also comprises a heat insulation layer disposed in the frame, such that the heat insulation layer surrounds the solar cells and the channel, to prevent the discharge of heat. It further comprises a reflection plate disposed at another side of the condenser to reflect the solar energy to the solar cell. Preferred Method: The assembly method further comprises preparing a connection member to interconnect the channel parts, where the connecting the at least one pair of channel parts comprises connecting ends of the at least one pair of channel parts using the connection member.