Evolution of the kinetic luminosity density (Ω_kin) for all RL AGN in XXL-S for PDE (solid black line) and PLE (dashed black line) fits, integrated from log[L_{1.4 GHz} (W Hz⁻¹)] = 22.4 to 27.2 (the full range of luminosities probed in the RLFs). The black and grey shaded areas represent the uncertainties for the RL AGN PDE and PLE fits, respectively. For comparison, Ω_kin for the RL AGN from Smolčić et al. (2009, 2017a) are displayed as the red shaded region and the blue line, respectively. The uncertainties in the Cavagnolo et al. (2010) scaling relation for the XXL-S data are shown as the black dash dot lines. The evolution of the RL AGN in XXL-S is broadly consistent with the evolution of the RL AGN in the samples from Smolčić et al. (2009, 2017a).