ELM simulations for the MAST-U Super-X tokamak have been obtained, using the JOREK code. The JOREK visco-resistive MHD model has been used to obtain comparisons of divertor configurations. The simulations show a factor 10 decrease in the peak heat flux to the outer target of the Super-X in comparison to a conventional divertor configuration. A roll-over in the target density flux to the outer Super-X target as a function of upstream density has been obtained with the JOREK two temperature, neutral fluid model and a comparison to SOLPS is given. A MAST-U case after the roll-over is used for ELM burn-through simulations, where peak target heat fluxes and electron temperatures occur 0.1 ms after the crash. The peak heat flux obtained with a multiple toroidal mode number simulation is 9.5 MW/m2 to the lower outer Super-X target. The recovery time of the peak target electron temperature, to almost pre-ELM conditions, is a few ms, shorter than the inter-ELM phase. When the target electron temperature has recovered to around 5 eV the ionisation front in the divertor moves upstream, away from the target, indicating a transition back to detachment after a large ELM crash.