Electricity generation
              
              
                Construction, operation and maintenance of generating plants, and
                purchase/sale of energy on wholesale markets.
              
            
                Production plants*
              
              
                % of 2019 net output
              
              
                  39%
                  
Renewable
                Renewable
 
                
                  16%
Nuclear
                Nuclear
 
                
                  14%
Own combined
cycle production
                Own combined
cycle production
 
                
                  25%
Third-party combined
cycle production
                Third-party combined
cycle production
 
                
                  6%
Cogeneration
                Cogeneration
 
                 
                
                  0%
Conventional thermal
              Conventional thermal
                Transmission and distribution of electricity
              
              
                Construction, operation and maintenance of electrical lines, substations,
                transformer centres and other infrastructure, to bring electrical power from
                production centres to the end user.
              
            
                Electric grids*
              
              
                * At 31 December 2019
              
               
                4.400
High- to medium-
voltage
transformer
substations
                Overhead lines
              
               
                
                  17.840 km
of transmission lines
              of transmission lines
 
                
                  979.926 km
of distribution lines
              of distribution lines
 
                1,5 millions
Medium- to low
voltage
distribution
transformers
                Underground lines
              
               
                
                  1.295 km
of transmission lines
              of transmission lines
 
                
                  192.452 km
of distribution lines
              of distribution lines
                Retail sale of electricity and gas
              
              
                Supply to end users of electricity, gas, products
                and complementary services.
              
              
                Consumers
              
              
                  34 
millions
                millions
                  9,9%
                
                
                  41,3%
                
                
                  2,3 %
                
                
                  32,7 %
                
                
                  13,8 %
                
              - Spain
- United Kingdom
- United States
- Brasil
- IEI