In this variation the Energy Services Company (ESCO) goes one step further and also integrates the delivery of the energy, or at least the electricity needed to power the building and the electrical installations that provide key functions to provide the comfort and other functionalities. In that case the ESCO not only manages the energy efficiency measures and flexibility but also has more leverage to negotiate prices or volume discounts. He may negotiate and provide more dynamic prices that allow to combine implicit Demand Response (DR) with explicit DR.

Ultimately the ESCO can become electricity supplier or an electricity supplier could develop an ESCO activity for Active Building Energy Performance Contracting‘s (AEPC), which is already the case for classical Energy Performance Contract (EPC).