Understand power before you build it.
Practical, evidence-aware guides to flywheels, DIY generators, off-grid electricity and backup power—plus an independent evaluation of Kinetic Power System.
Four connected power questions
Physics first. Product claims second.
Flywheel energy storage is established engineering, but it is storage—not a source of free energy. A motor can accelerate a rotor to store electrical energy as rotational kinetic energy; the same machine can operate as a generator to recover part of that energy later. Real systems must account for bearing, aerodynamic, electrical and conversion losses.
That distinction matters when evaluating DIY energy offers. We separate established engineering principles from claims that are specific to a particular guide or proposed build.