A system comprising: power conversion circuitry for providing electrical power to a load; output terminals that output power from the power conversion circuitry to a plurality of leads; a controller for controlling output of electrical power from the power conversion circuitry, whereby the controller comprises a mode component and, wherein the controller is configured to: receive a signal to trigger a calibration mode in which the controller: controls the power conversion circuitry to provide a known current to the plurality of leads for connecting the power conversion circuitry to the load at a distal end, wherein the plurality of leads are shorted at the distal ends during the calibration mode; measures a voltage drop across the output terminals while the plurality of leads are shorted at the distal ends; and stores a parameter determined based on the voltage drop, wherein the parameter comprises one or more of the voltage drop and an impedance of the plurality of leads calculated based on the voltage drop and the known current; and wherein, in an operational mode, the plurality of leads are not shorted and are connected to the load, and the controller controls the power conversion circuitry to provide a target voltage to the load based on the stored parameter; characterized in that the mode component is configured to cause the controller to exit the calibration mode after the controller senses a significant change in impedance, whereby the significant change reflects the removal of the short across the distal ends of the plurality of leads, such that the mode component defaults to the operational mode. power conversion circuitry for providing electrical power to a load; output terminals that output power from the power conversion circuitry to a plurality of leads; a controller for controlling output of electrical power from the power conversion circuitry, whereby the controller comprises a mode component and, wherein the controller is configured to: receive a signal to trigger a calibration mode in which the controller: controls the power conversion circuitry to provide a known current to the plurality of leads for connecting the power conversion circuitry to the load at a distal end, wherein the plurality of leads are shorted at the distal ends during the calibration mode; measures a voltage drop across the output terminals while the plurality of leads are shorted at the distal ends; and stores a parameter determined based on the voltage drop, wherein the parameter comprises one or more of the voltage drop and an impedance of the plurality of leads calculated based on the voltage drop and the known current; and wherein, in an operational mode, the plurality of leads are not shorted and are connected to the load, and the controller controls the power conversion circuitry to provide a target voltage to the load based on the stored parameter; characterized in that the mode component is configured to cause the controller to exit the calibration mode after the controller senses a significant change in impedance, whereby the significant change reflects the removal of the short across the distal ends of the plurality of leads, such that the mode component defaults to the operational mode. receive a signal to trigger a calibration mode in which the controller: controls the power conversion circuitry to provide a known current to the plurality of leads for connecting the power conversion circuitry to the load at a distal end, wherein the plurality of leads are shorted at the distal ends during the calibration mode; measures a voltage drop across the output terminals while the plurality of leads are shorted at the distal ends; and stores a parameter determined based on the voltage drop, wherein the parameter comprises one or more of the voltage drop and an impedance of the plurality of leads calculated based on the voltage drop and the known current; and controls the power conversion circuitry to provide a known current to the plurality of leads for connecting the power conversion circuitry to the load at a distal end, wherein the plurality of leads are shorted at the distal ends during the calibration mode; measures a voltage drop across the output terminals while the plurality of leads are shorted at the distal ends; and stores a parameter determined based on the voltage drop, wherein the parameter comprises one or more of the voltage drop and an impedance of the plurality of leads calculated based on the voltage drop and the known current; and wherein, in an operational mode, the plurality of leads are not shorted and are connected to the load, and the controller controls the power conversion circuitry to provide a target voltage to the load based on the stored parameter; characterized in that the mode component is configured to cause the controller to exit the calibration mode after the controller senses a significant change in impedance, whereby the significant change reflects the removal of the short across the distal ends of the plurality of leads, such that the mode component defaults to the operational mode.