In 1990 the Romanian Electricity Authority (RENEL) was set up following the reorganization of the former Ministry of Electric Energy. RENEL was a vertically integrated state owned company, whose main activities were:
- Electricity generation, transmission, distribution and supply in conventional and nuclear based power plants
- Heat generation and transmissione
Starting with 1992, RENEL's reorganisation process began and some of ancillary activities were separated from RENEL .