PV/Wind/Diesel Hybrid Energy Systems are used for energy supply in remote areas. Depending on the geographical and meteorological situation as well as on the load profile specific hybrid energy system designs are the best and most cost efficient solution. Typically, these systems are used in regions where the costs for a grid connection are too high due to the remote necessaries. The advantage of these systems is that it is possible to design them very flexible and adjust them to the concrete demands. On the other hand, they represent a complex system thus requiring some effort in planning and design. The proposed system is intended to supply a small living complex in a remote area in Khartoum (Sudan). The aim is to find the best system configuration and to what extent the combination of these two renewable energy sources can reduce the costs compared to a grid-connected system.