Rene.Revol@wanadoo.fr 7, chemin du vieux Chdne 38942 Meylan Cedex -France 11, rue des cerisiers 91 160 Longjumeau -FranceAbstract : One possibility for reducing costs, without compromising quality of service, consists in simplifying the architecture of energy and climate control installations. After setting out the advances in and the prospects for using new energy sources, this contribution presents an original architecture which has been the subject of a patent application. The situation is that, mirroring data processing systems, telecommunications equipment will offer 23OW50Hz power supply interfaces which will require a redundant and high-efficiency uninterruptible power supply (UPS). With the architecture presented, this UPS will be drawn on directly in order to start up the source substituting for the local electricity grid. Conversely, the substitute source will be drawn on directly in order to maintain the charge in the batteries incorporated into the UPS.