The “Energy Performance Contract”, defined by European Directive in 2006, is a legal instrument that sets an energy efficiency objective. Concluded by two parties in the context of an urban renovation (building, public lighting, etc.) project, it contains an “energy performance guarantee”. In practice, the energy service provider responsible for implementing the improvement works undertakes to achieve a performance level based on regular measurements taken throughout the contract period. Under a bonus/malus system, the provider is financially remunerated or penalised according to whether the performance level set out in the contract has, or has not, been met.