Abstract: A portable pressure washer comprising: a tank, where the tank stores water used in conjunction with the pressure washer; a hose, where the hose is connected the tank at a connection end provides the transfer of pressurized water from the tank; a nozzle, where the nozzle attaches to a emission end of the hose; and a convertible power supply, where the power supply provides at least two forms of a power source. The power supply may include a cord and a connector. In one particular embodiment, the connector is an AC/DC converter. The power supply may also include a battery pack.