The RECs and the I-RECs systems are aimed at promoting and providing economic support to the environmental value of electricity produced from renewable energy sources.

RECs and I-RECs, as happens for GOs, certify the production of 1 MWh of electricity from renewable sources during the year of issue.

The RECs and I-RECs certificates are distinct from the physical supply of electricity, this means that they can be marketed separately from the electricity which they refer to. By using them, the buyer finances the electricity produced from renewable sources, thus testifying his commitment to the environment.