PURPOSE: A photovoltaic power system is provided to reduce an installation space and costs since there is no need to secure an additional installation space. CONSTITUTION: A photovoltaic power system(100) includes a window frame(110) and a generation module(120). The window frame is installed on the wall of a building and includes a horizontal member and vertical member. The generation module is installed in the frame to generate electricity by using an incident light. A solar cell is attached to the horizontal member and the vertical member.
