A system capable of simultaneously purifying water and generating electricity includes one or more prime mover, a variable displacement hydraulic pump, a first variable displacement hydraulic motor hydraulically coupled to the variable displacement hydraulic pump, a second variable displacement hydraulic motor hydraulically coupled to the variable displacement hydraulic pump, and a controller having one or more processors adapted to execute software maintained in one or more non-transient memories, the controller adapted to control the pump, the first motor, and the second motor, wherein the first motor output shaft is adapted to be coupled to an electrical generator to thereby generate electricity, and wherein the second motor output shaft is adapted to be coupled to a water purification pump to draw unpure water from a feed supply and provide the unpure water to a water purification system to thereby generate permeated water and separated impurities.