This read-write Integer32, ranging from 20 to 95 percent, sets the efficiency target the Dc1 plant's energy management feature aims for when deciding how many rectifiers to keep running. An admin tunes this value to control how aggressively the plant shuts down spare rectifiers to chase higher efficiency versus keeping more capacity online. For example, setting this to 85 percent would have the energy management logic try to keep active rectifiers loaded to around 85 percent of their capacity rather than running many rectifiers lightly loaded.