A solar device includes a frame, a solar cell module, an inverter and a fastener mechanism. The frame has a first edge and a second edge opposite to the first edge. The solar cell module is disposed in the frame. The fastener mechanism is used for fastening the frame. The fastener mechanism includes a base and a fastener member. The inverter is fixed on the base. A first end of the fastener member is pivotally connected to the base and a second end of the fastener member has a first extending portion, wherein the first end is opposite to the second end. The first extending portion has a protruding structure. When the first edge of the frame is disposed on the base, the fastener member can be rotated with respect to the base so as to engage the protruding structure with the second edge of the frame.