The purpose of this master thesis is to analyse in detail the possible integration of two different technologies applied for an industrial plant, according to an energetic point of view and in terms of economic feasibility. The first part is focused on the implementation of a renewable energy system, the photovoltaic one, whereas the second part aims to study the coupling of Combined Heat and Power technology with a photovoltaic plant. The company Lightwire provided a design tool, which is employed for both scenarios and it allows easily to model the industrial structure and to dimension the PV plant. Subsequently, the energy produced is estimated in both cases, by paying attention on that energy self-consumed, which will be able to reduce the electricity withdrawn from the network.