In this work we presented the development of an energy model based on a mixed system of renewable energy, with primary energy sources as solar and biomass. It is a hybrid and autonomous system with solar PV panels and gasification cogeneration technology. Also it is an environment friendly process aiming the reduction of energy demand, costs and emissions. This energy model is a new sustainable standard about energy consumption efficiency (electrical and thermal demands) of a small hotel building and a relevant contribution to certify the building, in compliance with the laws of the country on the thermal performance of buildings. (C) 2010 Elsevier B.V. All rights reserved.