A full renewal of the control system of the thermal oil installation has recently been completed in Cadiz. On board of Allseas’ Solitaire, one of the biggest deepsea pipelayer vessels in the world, 6 fully new e-cabinets for the local control of the 8 economizers, 2 oil fired heathers and the hot water calorifier have been installed and prepared for future modifications. The Energy Management System has been updated with an easy accessible HMI to enable remote control from the engine control room. We may look back on a very successful project due to a smooth cooperation of Konutherm with ISS Industrial & Ship Services and the technical crew on board of the Solitaire.