with an embodiment of the invention is illustrated in fig2 the grid interactive inverter 14 receives a dc input from a photovoltaic module 12 via input terminals and provides an ac output to a set of power lines 16 via output terminals in the illustrated embodiment the grid interactive inverter 14 includes a filter 30 that is configured to reduce the impact of electromagnetic interference that can back propagate from the switching dc dc converter onto the wires that connect the inverter to the panel without such a filter unacceptable levels of radiated emission on the dc lines may result the current received from the photovoltaic module is provided to a dc dc conversion stage 32 that provides current to a high voltage dc link capacitor 34 at a voltage in excess of the peak voltage of the grid the high voltage dc link capacitor 34 provides current to a dc ac inverter stage 36 the ac output of the dc ac inverter stage 36 is filtered by a passive filter 38 to eliminate electromagnetic interference prior to providing the ac to the grid via the power lines 16 this low pass filter has a corner frequency that is several orders of magnitude higher than the low frequency grid waveform the ac switching produces a tremendous amount of high frequency noise that would propagate onto the local grid if not rejected by this.