New Zealand's Antarctic research station, Scott Base, is currently 100% reliant on aviation turbine fuel and existing diesel generator sets to produce the heat and electricity necessary to sustain staff activities. Decreasing fuel consumption at Scott Base has benefits economically, politically and environmentally. A method of reducing fuel consumption and increasing base independence that is receiving considerable attention from Antarctica New Zealand is the addition of wind power to the existing energy system. A performance-objective design of a wind-diesel hybrid energy system for Scott Base is proposed in order to determine the most effective hybrid system configuration with the lowest cost within a set of system constraints. A demand side management technique is also evaluated as a measure to further increase potential fuel savings. Modelling is completed using the simulation tool HOMER and results are presented for several different system configurations.