Since 2009, Terna has been an active member of several European bodies. The scope of these associations is to involve greater integration between regional European electricity markets. Among these bodies, the most important are ENTSO-E (European Network of Transmission System Operators for Electricity), JAO (Joint Allocation Office) and CORESO (Coordination of Electricity System Operators).
ENTSO-E (European Network of Transmission System Operators for Electricity) is the sector's most important body at the European level, as it represents the continent's network of transmission system operators for electricity. The network, created in 2008 as a voluntary association, was subsequently formalised by EU regulation 714/2009. The following are represented within ENTSO-E: 43 electricity grid operators from 36 countries in Europe - in addition to the 28 EU countries, TSOs from Iceland, Macedonia, Montenegro, Norway, Serbia, Switzerland and Turkey (the latter has observer member status) are also members.
The JAO (Joint Allocation Office) was formed on 24 June 2015 from the merger of the CAO and the CASC.EU, the two regional offices for the allocation of cross-border transmission capacity. This agreement marks a decisive step towards the simplification of the electricity market within the EU. The JAO is a joint services company that brings together 20 Transmission System Operators (TSOs) in 17 countries and deals mainly with annual, monthly and daily auctions for transmission rights across 29 European borders.
In 2010, Terna and five other grid operators (Elia, RTE, 50 Hertz and NGC) launched CORESO (Coordination of Electricity System Operators), in order to improve transmission grid security through coordination of electricity flow forecasts and operations between Italy, France, Belgium, Great Britain and northeast Germany.
Terna also plays an active role in associations open to other big stakeholders of the electricity sector, which focus on subject areas that are particularly relevant for the company, such as RGI (Renewables Grid Initiative) and EASE (European Association for Storage of Energy).
The RGI (Renewables Grid Initiative), is a unique collaboration of environmental NGOS and transmission system operators from across Europe. The association promotes transparent, environmentally sensitive grid development to enable the further steady growth of renewable energy and the energy transition.
Terna collaborates with the European association EASE to encourage research and industrial development in the field of storage systems, and promotes this technology for the transition towards a stable, flexible, eco-sustainable and less costly continental energy system.