Disclosed are systems and methods for generating power. The system includes a sealed chamber, a displacer located inside the chamber, a magnetic mechanism to actuate the displacer, and a linear alternator. The chamber includes a first side, a first top surface, and a first bottom surface, the first side located adjacent to a heat source and the second side adjacent to a heat sink. The displacer includes a pivot surface, a rocker, or a slide, and may include a regenerator.