A Recurrent 5% Energy Partition in Magnetic Reconnection: From Solar Flares to Black Holes - Observations, Simulations and Falsifiable Predictions

We present numerical and observational evidence for a recurrent energetic proportion in magnetic reconnection processes across vastly different scales. Using RMHD simulations (TAJIN v6.1, Beta 20) and a compilation of solar flares, magnetospheric events, and black hole accretion systems including Sgr A_, we find a persistent energy partition of approximately 0.05, independent of system size, magnetic field strength, and plasma beta.We show that this 5% proportion emerges naturally from the balance between magnetic energy release, particle acceleration, and bulk heating in the reconnection layer, and that it remains stable across 10 orders of magnitude in energy. We derive three falsifiable predictions: (1) a universal 5% non-thermal fraction in forthcoming flare catalogs, (2) a correlated 5% radio-to-X-ray luminosity ratio in MAD accretion flows, and (3) a systematic deviation from 0.05 in regimes where radiative cooling dominates.If confirmed, this recurrent proportion provides a simple, scale-free diagnostic for magnetic reconnection efficiency, with direct applications to solar physics, magnetospheric physics, and black hole astrophysics.