Energy Storage Apparatus and Method for Checking Function of Energy Storage Apparatus

An energy storage apparatus includes: energy storage devices B to B; a cutoff switch that cuts off current of the energy storage device; a parallel circuit including a rectifier element in which a discharge direction is set to a forward direction, the parallel circuit being connected in parallel to the cutoff switch ; a first current sensor that measures the current of the energy storage devices B to B; a discharge circuit that discharges an inspection current to the first current sensor through a discharge path including the parallel circuit using the energy storage device as a power source; and a controller . The controller determines whether the first current sensor correctly measures the current based on a measurement value of the inspection current Ib.