A system, comprising: - a distributed direct current, DC, bus coupled to a plurality of DC power sources (94, 100, 104, 106) that provide DC power to the distributed DC bus; and - a welding-type system comprising: - a DC power plug comprising three contacts, wherein the DC power plug is configured to make and break a DC connection between the distributed DC bus and the welding-type system; - a welding output configured to provide welding power; - circuitry configured to condition DC power received from the distributed DC bus via the DC input plug into welding power, the circuitry comprising: - a contactor circuit configured to isolate the welding-type system from the distributed DC bus comprising a pre-charge relay configured to limit an incoming DC current into the welding-type system during a power up condition to a threshold current limit; - a filter circuit configured to raise or lower the input voltage; - a bulk energy storage element configured to output conditioned DC power; and - a DC-to-DC converter configured isolate and/or adjust an output voltage, wherein the contactor circuit, the filter circuit, the bulk energy storage element and the DC-to-DC converter are electrically coupled in series; - an on/off switch electrically coupled between the DC power plug and the contactor circuit, the on/off switch configured to connect or disconnect the welding-type system to or from the distributed DC bus; and - a controller electrically coupled to the contactor circuit and the DC-to-DC converter via feedback and control lines, wherein the controller is configured to control operation of the contactor circuit and the DC-to-DC converter using feedback and control signals via the feedback and control lines. - a distributed direct current, DC, bus coupled to a plurality of DC power sources (94, 100, 104, 106) that provide DC power to the distributed DC bus; and - a welding-type system comprising: - a DC power plug comprising three contacts, wherein the DC power plug is configured to make and break a DC connection between the distributed DC bus and the welding-type system; - a welding output configured to provide welding power; - circuitry configured to condition DC power received from the distributed DC bus via the DC input plug into welding power, the circuitry comprising: - a contactor circuit configured to isolate the welding-type system from the distributed DC bus comprising a pre-charge relay configured to limit an incoming DC current into the welding-type system during a power up condition to a threshold current limit; - a filter circuit configured to raise or lower the input voltage; - a bulk energy storage element configured to output conditioned DC power; and - a DC-to-DC converter configured isolate and/or adjust an output voltage, wherein the contactor circuit, the filter circuit, the bulk energy storage element and the DC-to-DC converter are electrically coupled in series; - an on/off switch electrically coupled between the DC power plug and the contactor circuit, the on/off switch configured to connect or disconnect the welding-type system to or from the distributed DC bus; and - a controller electrically coupled to the contactor circuit and the DC-to-DC converter via feedback and control lines, wherein the controller is configured to control operation of the contactor circuit and the DC-to-DC converter using feedback and control signals via the feedback and control lines. - a DC power plug comprising three contacts, wherein the DC power plug is configured to make and break a DC connection between the distributed DC bus and the welding-type system; - a welding output configured to provide welding power; - circuitry configured to condition DC power received from the distributed DC bus via the DC input plug into welding power, the circuitry comprising: - a contactor circuit configured to isolate the welding-type system from the distributed DC bus comprising a pre-charge relay configured to limit an incoming DC current into the welding-type system during a power up condition to a threshold current limit; - a filter circuit configured to raise or lower the input voltage; - a bulk energy storage element configured to output conditioned DC power; and - a DC-to-DC converter configured isolate and/or adjust an output voltage, wherein the contactor circuit, the filter circuit, the bulk energy storage element and the DC-to-DC converter are electrically coupled in series; - a contactor circuit configured to isolate the welding-type system from the distributed DC bus comprising a pre-charge relay configured to limit an incoming DC current into the welding-type system during a power up condition to a threshold current limit; - a filter circuit configured to raise or lower the input voltage; - a bulk energy storage element configured to output conditioned DC power; and - a DC-to-DC converter configured isolate and/or adjust an output voltage, wherein the contactor circuit, the filter circuit, the bulk energy storage element and the DC-to-DC converter are electrically coupled in series; - an on/off switch electrically coupled between the DC power plug and the contactor circuit, the on/off switch configured to connect or disconnect the welding-type system to or from the distributed DC bus; and - a controller electrically coupled to the contactor circuit and the DC-to-DC converter via feedback and control lines, wherein the controller is configured to control operation of the contactor circuit and the DC-to-DC converter using feedback and control signals via the feedback and control lines.