Magnetic Reconnection (MR) is a fundamental and ubiquitous process in space plasmas allowing the reconfiguration of magnetic field lines, strong particle energization and heating. In this work we employ the Coarse-Graining (CG) approach, a powerful tool that allows studying locally ({\it in space}) the energy cascade, to underline how MR plays a major role in driving turbulence at sub-ion scales.

The CG quantity $\pi_\ell(\bm{x})$ measures the energy transfer rate across scale $\ell$ at position $\bm{x}$, which is particularly convenient to study localized phenomena giving rise to intense cross-scale energy transfer. \\

Applications to Hybrid-Vlasov-Maxwell numerical simulations and to \textit{in-situ} satellite observation show an intense energy cascade at scales $\ell\lesssim d_i$ at the reconnecting sites while none to little energy transfer is present at larger scales and at non-reconnecting locations.
This work demonstrates that reconnecting current sheets inject energy directly at scales comparable to $d_i$, which is then transfered to sub-ion turbulence even in the absence of the MHD inertial range.