Essentially part of the jump points in Mass Effect. Obviously we don't have Element Zero, but its the same general idea. Sapping/Harnessing the power of a star/local energy ball, and using it to power jumps or flight. The main problem? Its the obvious one really, we can't do this with our own sun....its just too volatile/random. And then there's radiation, solar flares, etc. We would need equipment that can survive temps that even the weakest sun reaches....protons, neutrons and electrons could survive this immense heat, but only as plasma....
That's the kind of tech required. A PNE suit/shield made of controllable plasma? Yeah we're getting into whackyness with that, or far enough "plates" on axis points that emulate solar paneling, suspended/controlled via satellites.....but even then....ah nevermind.