The contract guaranteed performance (Energy Performance Contract ) is the main form of contract with which operate Esco , which provides the definition of a minimum level of energy results , guaranteed by contract.

The contractual form is shown explicitly as contractual form of reference for the Public Administration Art. 14 and Annex 8 of Decree 102/2014 , which expressly provides the minimum requirements that must have this form of contract.

• It reduces the technical risk and cost of the Customer, protecting them against any unsatisfactory results
• Induces practice on the part of the customer go out and also in the management of all phases of the contract ( design, construction , operation and maintenance of systems for which the intervention of energy efficiency )
• It can provide a predefined boundary between Esco and the Customer of any extra savings they get.
• If the result is not achieved I leave shall refund the customer ‘s failure to result

Even the Energy performance contracting is based on the mechanism of third party financing ( TPF ) , illustrated in the figure below , which consists in providing comprehensive services to improve efficiency of a technological system whose benefits derive from the energy savings , if any , and then the money that allow to go out to recover the total investment cost , including his own profit , based on the savings actually realized.