This paper presents a comprehensive approach to manage energy resources in buildings connected to the electricity grid and equipped with energy production and storage systems. The aim of the work is to find interesting configurations that favour energy self-consumption while minimizing the negative impact of the local production on the grid. Energy and economic criteria are proposed to evaluate the strategy. A parametric study allowed the local systems to be optimally designed. So, we used first the TRNSYS software to model the thermal behaviour of a single-storey house, inhabited by four persons and equipped with photovoltaic solar panels, a vertical-axis windmill and batteries for electricity storage. The results we obtained in simulation prove that one can design in an optimal way the just-mentioned systems and find interesting configurations offering a good compromise between energy self-consumption and renewable energy coverage rate while avoiding the impact of the building on the grid to be clearly negative.