Spanish cabinet has recently approved the Royal Decree 244/2019, after a proposal coming from the Ministry for the Ecological Transition. The Royal Decree regulates the administrative, technical and economic conditions of electric power consumption. In relation to self-supply without surplus, the Royal Decree requires that generators have an anti-discharge mechanism to prevent boosts to the network and to ensure its operation. It must be tested by an ENAC-accredited laboratory according to UNE-EN ISO/IEC 17025 Standard.

With this new Royal Decree, the Administration relies on accreditation as a tool to demonstrate the laboratories' technical competence to assess systems that ensure there are no discharges to the network in self-supply without surplus. Through accreditation, a laboratory can demonstrate it has expert staff with the appropriate experience; uses valid and technically controlled methods and procedures; has the necessary and properly maintained equipment and facilities; operates under strict quality control; and produces clear, complete and accurate reports.

There are currently two laboratories accredited by ENAC to carry out this type of testing.