1. A method of remotely monitoring the state of one or more brushes of a brush holder assembly of an electrical generator at a first electrical facility, the method comprising: receiving a signal at an off-site monitoring station, the signal sent from an imaging device positioned in line of sight of the brush holder assembly at the first electrical facility, the off-site monitoring station located remotely from the first electrical facility, the signal being representative of an image of the brush holder assembly acquired by the imaging device; and displaying the image acquired by the imaging device on a monitor at the off-site monitoring station to determine the state of degradation of one or more brushes of the brush holder assembly.