Evolution of the comoving kinetic luminosity density (Ω_kin) for RL HERGs (blue lines), LERGs (red lines), and all RL AGN (black lines) in XXL-S using the Cavagnolo et al. (2010) scaling relation, integrated from log[L_{1.4 GHz} (W Hz⁻¹)] = 22.4 to 27.2 (the full range of luminosities probed in the RLFs) at each redshift for best fit PDE models. The PLE models do not differ significantly from the PDE models on this scale. The upper and lower lines for each population represent the range of uncertainties in the Cavagnolo et al. (2010) scaling relation.