This deliverable presents the final design of the ASTEP system specifically tailored for both end-users, including the requirements of the different components integrated in the system. This includes the final system design and the requirements of the piping, heat transfer fluid and ancillary systems, sensors, pumps, heat exchangers and cooling lines. The accumulator will be installed in series with solar concentrator for both end-users. This configuration has been selected due to its easier control and lower actuation and measuring costs. Therminol 59 is selected as the HTF. First, synthetic oils have been selected instead of pressurized water or direct steam generation due to its application flexibility. Then, Therminol 59 was selected thanks to its higher pumpability at low temperatures, especially important for AMTP case. Regarding the piping, DN20 tubes are selected for most lines (except those within the SunDial concentrator affected by the HTF recirculation, which should be DN50) in order to limit pressure drop. This design would limit total line pressure drop to 2 bar. In what refers to the piping insulation, 101.6 mm fiberglass insulation is selected to limit heat losses. Heat losses might still be relatively high (2 kW) due to the small size of the prototype, but cost limitations led to this choice both in terms of material and thickness. The components to fill and drain the system are designed together with the expansion vessel. A pump with a manifold is used to initially fill the system or to drain it completely. The expansion vessel is sized to ensure pressure limitations in the system. The cooling circuit for MAN is also designed. This cooling is based on two absorption chillers (Purix A25 units), 3.1 kW each. The inertia tank sizing, the pumps and the sensors required for its control are detailed in the deliverable. The temperatures, pressures, and mass flows of the different sensors, valves, pumps and heat exchangers have been considered in order to select these systems. This selection has always been done with cost perspective since these elements might be relatively expensive for the system size. Finally, the requirements of the chiller-water line are given in terms of the required elements, including the absorption and compressor chillers to be used. This configuration with absorption chiller and compression chiller in series has been selected since no absorption chillers have been found for the system size. Nevertheless, a large application of ASTEP system would lead to larger absorption chillers directly fed by synthetic oil with lower cooling temperatures. Therefore, no compression chiller in series would be necessary and higher COP would be achieved.