Cumulative kinetic (top) and thermal (bottom) feedback energy for different stellar initial mass as a function of time for the single star models with Z = 0.004 and no initial rotation velocity is shown with coloured bars for the whole time of the PION simulation. The different columns show different initial ambient densities, while the lower three rows vary r_s. The star symbol indicates the time of the SN, while black regions visualise outflowing energies below 10⁴⁶ erg or inflows. The upper row shows IMF-weighted results (normalised to the total mass in stars above 8 M_⊙). Additionally, the sum of the energy inputs from SN, stellar winds and an estimate of the photoionisation energy is shown (labelled ‘Star’), and the energy input excluding the photionisation energy (labelled ‘no ph’).