Patent ID: 8036005

Claim:
An inverter, including an inverter housing, comprising: inverter circuitry configured to convert a direct current voltage to an alternative current voltage at a grid frequency, the inverter circuitry located inside the inverter housing, and comprising three terminals extending to an external surface of the housing corresponding to a positive direct current voltage terminal, a ground terminal, and a negative direct current terminal of the inverter circuitry, respectively; and a safety fuse external to the inverter housing, configured to selectively connect one of the positive or negative direct current voltage terminals of the inverter circuitry to the ground terminal, wherein the safety fuse is configured within a plug connector part comprising at least two plug connector terminals configured to engage at least two of the three terminals on the external surface of the housing, wherein in a first orientation, the safety fuse connects the positive direct current voltage terminal of the inverter circuitry to the ground terminal, and wherein in a second, different orientation the safety fuse connects the negative direct current voltage terminal of the inverter circuitry to the ground terminal, wherein the plug connector part further comprises one of a mechanical plug coding or an electrical plug coding operable to provide an indication of the first or second orientation.