Transient electromagnetic induction into a photovoltaic (PV) panel caused by a lightning is investigated by experiments and numerical simulations using Electromagnetic Transients Program (EMTP). The induction depends on asymmetry of the lightning point and grounding resistances for the structure anchoring a PV panel. The induction depends on the current flowing into the frame of a PV panel. A numerical model of a PV panel for analyzing the induction is proposed. The mutual coupling between the frame and the internal circuit of a PV panel can be calculated by line parameter calculation programs installed in EMTP. The effect of the PV panel elements is clarified by numerical simulations. The glass covering PV modules and the internal capacitance also affect the induced current.