A system, comprising: a first circuit configured to receive positive and negative polarity signals of a DC bus and to convert a first voltage of the DC bus to a lower second voltage and isolate the second voltage from the first voltage; a third circuit operatively connected to an output of the first circuit and configured to convert the second voltage to a lower fourth voltage and to isolate the fourth voltage from the second voltage; a fourth circuit operatively connected to the output of the first circuit and configured to convert the second voltage to a lower fifth voltage and to isolate the fifth voltage from the second voltage; a battery module coupled to the DC bus; and a processor coupled to the third and fourth circuits (118, 120); characterized in that the third circuit is further configured to receive and to condition at least a first monitoring signal related to the battery module, the first monitoring signal being a monitored negative current bus signal from the DC bus, to form a first conditioned monitoring signal, so that the third circuit is associated with a negative side of the DC bus, wherein at least a signal conditioning portion of the third circuit is powered by the fourth voltage and wherein conditioning at least the negative DC bus monitored current signal comprises one of filtering, isolating or noise reduction of the signal; the fourth circuit is further configured to receive and to condition at least a second monitoring signal related to the battery module, the second monitoring signal being a monitored positive current bus signal from the DC bus and being isolated from the monitored negative current bus signal, to form a second conditioned monitoring signal, so that the fourth circuit is associated with a positive side of the DC bus, wherein at least a signal conditioning portion of the fourth circuit is powered by the fifth voltage and wherein conditioning at least the isolated positive DC bus monitored current signal comprises one of filtering, isolating or noise reduction of the signal; and wherein the processor is configured to receive the first conditioned monitoring signal and the second conditioned monitoring signal and to control operation of the battery module in response to the first and second conditioned signals. a first circuit configured to receive positive and negative polarity signals of a DC bus and to convert a first voltage of the DC bus to a lower second voltage and isolate the second voltage from the first voltage; a third circuit operatively connected to an output of the first circuit and configured to convert the second voltage to a lower fourth voltage and to isolate the fourth voltage from the second voltage; a fourth circuit operatively connected to the output of the first circuit and configured to convert the second voltage to a lower fifth voltage and to isolate the fifth voltage from the second voltage; a battery module coupled to the DC bus; and a processor coupled to the third and fourth circuits (118, 120); characterized in that the third circuit is further configured to receive and to condition at least a first monitoring signal related to the battery module, the first monitoring signal being a monitored negative current bus signal from the DC bus, to form a first conditioned monitoring signal, so that the third circuit is associated with a negative side of the DC bus, wherein at least a signal conditioning portion of the third circuit is powered by the fourth voltage and wherein conditioning at least the negative DC bus monitored current signal comprises one of filtering, isolating or noise reduction of the signal; the fourth circuit is further configured to receive and to condition at least a second monitoring signal related to the battery module, the second monitoring signal being a monitored positive current bus signal from the DC bus and being isolated from the monitored negative current bus signal, to form a second conditioned monitoring signal, so that the fourth circuit is associated with a positive side of the DC bus, wherein at least a signal conditioning portion of the fourth circuit is powered by the fifth voltage and wherein conditioning at least the isolated positive DC bus monitored current signal comprises one of filtering, isolating or noise reduction of the signal; and wherein the processor is configured to receive the first conditioned monitoring signal and the second conditioned monitoring signal and to control operation of the battery module in response to the first and second conditioned signals.