##### 



EXHIBIT 8.1


LIST OF SUBSIDIARIES


|                                        |  |                      |  |                                               |  |                                                           
|--------------------------------------- |  | -------------------- |  | --------------------------------------------- |  | ----------------------------------------------------------
|Company Name                            |  | Registered Office    |  | Activity                                      |  | Held by                                                   
|Agassiz beach LLC                       |  | Minnesota  USA      |  | Electricity generation from renewable sources |  | CHI minnesota Wind LLC                                    
|Agricola Rio Sahuil Ltda                |  | Santiago (Chile)     |  | Electricity generation from renewable sources |  | Agricola Y Constructora Rio Guanehe SA                    
|Agricola Y Constructora Rio Guanehue SA |  | Santiago (Chile)     |  | Electricity generation from renewable sources |  | Empresa Electrica Panguipulli SA Energia de Los lagos Ltda
|Aiten AS                                |  | Trnava (Slovakia)    |  | Information technology                        |  | Slovenské Elektràrne AS                                   
|Aquenergy Systems Inc.                  |  | South Carolina  USA |  | Electricity generation from renewable sources |  | Consolidated Hydro Southeast Inc.                         
|Asotin Hydro Company Inc.               |  | Delaware  USA       |  | Electricity generation from renewable sources |  | Enel North America Inc.                                   
|Autumn Hills LLC                        |  | Minnesota  USA      |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC                                    
|Avisio Energia S.p.A.                   |  | Trento (Italy)       |  | Gas distribution                              |  | Enel Rete Gas S.p.A.                                      
|Aziscohos Hydro Company Inc.            |  | Delaware  USA       |  | Electricity generation from renewable sources |  | Enel North America Inc.                                   
|Barras Electricas Galaico Asturianas SA |  | Lugo (Spain)         |  | Electricity distribution                      |  | Electra de Viesgo Distribucion SL                         
|Barras Electricas Generacion SL         |  | Lugo (Spain)         |  | Electricity generation                        |  | Barras Electricas Galaico Asturianas SA                   
|Beaver Falls Water Power Company        |  | Pennsylvania  USA   |  | Electricity generation from renewable sources |  | Beaver Valley Holdings Ltd.                               
|Beaver Valley Holdings Ltd.             |  | Pennsylvania  USA   |  | Electricity generation from renewable sources |  | Hydro Development Group Inc.                              
|Beaver Valley Power Company             |  | Pennsylvania  USA   |  | Electricity generation from renewable sources |  | Hydro Development Group Inc.                              
|Boot Field LLC                          |  | Delaware  USA       |  | Electricity generation from renewable sources |  | Boot Hydropower Inc.                                      
|Boot Hydropower Inc.                    |  | Massachusetts  USA  |  | Electricity generation from renewable sources |  | Boot Sheldon Holdings LLC                                 
|Boot Sheldon Holdings LLC               |  | Delaware  USA       |  | Electricity generation from renewable sources |  | Hydro Finance Holding Company Inc.                        
|Bypass Power Company                    |  | California  USA     |  | Electricity generation from renewable sources |  | CHI West Inc.                                             
|Canastota Wind Power LLC                |  | Delaware  USA       |  | Electricity generation from renewable sources |  | Essex Company                                             
|Central American Power Services Inc.    |  | Delaware  USA       |  | Electricity generation from renewable sources |  | Enel Latin America LLC                                    
|CHI Acquisitions Inc.                   |  | Delaware  USA       |  | Electricity generation from renewable sources |  | Enel North America Inc.                                   
|CHI Acquisitions II Inc.                |  | Delaware  USA       |  | Electricity generation from renewable sources |  | CHI Finance LLC                                           
|CHI Black River Inc.                    |  | Delaware  USA       |  | Electricity generation from renewable sources |  | CHI Finance LLC                                           
|CHI Canada Inc.                         |  | Québec  Canada      |  | Electricity generation from renewable sources |  | CHI Finance LLC                                           
|CHI Dexter Inc.                         |  | Delaware  USA       |  | Electricity generation from renewable sources |  | CHI Finance LLC                                           
|CHI Finance LLC                         |  | Delaware  USA       |  | Electricity generation from renewable sources |  | Enel North America Inc.                                   





---



##### 



|                                                                          |  |                            |  |                                                    |  |                                           
|------------------------------------------------------------------------- |  | -------------------------- |  | -------------------------------------------------- |  | ------------------------------------------
|Company Name                                                              |  | Registered Office          |  | Activity                                           |  | Held by                                   
|CHI Hydroelectric Company Inc.                                            |  | Newfoundland  Canada      |  | Electricity generation from renewable sources      |  | CHI Canada Inc.                           
|CHI Highfalls Inc.                                                        |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Finance LLC                           
|CHI Idaho Inc.                                                            |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Acquisitions Inc.                     
|CHI Magic Valley Inc.                                                     |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Acquisitions Inc.                     
|CHI Minnesota Wind LLC                                                    |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Finance LLC                           
|CHI Mountain States Operations Inc.                                       |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Acquisitions Inc.                     
|CHI Operations Inc.                                                       |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | Enel North America Inc.                   
|CHI Power Inc.                                                            |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | Enel North America Inc.                   
|CHI Power Marketing Inc.                                                  |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | Enel North America Inc.                   
|CHI Universal Inc.                                                        |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | Enel North America Inc.                   
|CHI West Inc.                                                             |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Acquisitions Inc.                     
|CHI Western Operations Inc.                                               |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Acquisitions Inc.                     
|Cise S.r.l.                                                               |  | Rome (Italy)               |  | Real estate management                             |  | Enel S.p.A.                               
|Climare Scrl                                                              |  | Genoa (Italy)              |  | Energy services                                    |  | Enel Distribuzione S.p.A.                 
|Co.Im Gas S.p.A.                                                          |  | S. Maria a Colle (Italy)   |  | Plant management, distribution and sale of gas     |  | Enel Rete Gas S.p.A.                      
|Concert S.r.l.                                                            |  | Rome (Italy)               |  | Certification of products facilities and equipment |  | Enel Produzione S.p.A.                    
|Coneross Power Corporation Inc.                                           |  | South Carolina  USA       |  | Electricity generation from renewable sources      |  | Aquenergy Systems Inc.                    
|Enel Guatemala SA (previously Conexion Energetica
    Centroamericana SA) |  | Guatemala                  |  | Electricity generation from renewable sources      |  | Enel Green Power International SA         
|Conexion Energetica Centroamericana El Salvador SA                        |  | San Salvador (El Salvador) |  | Electricity generation from renewable sources      |  | Gruppo EGI SA de cv Enel Latin America LLC
|Consolidated Hydro Mountain States Inc.                                   |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Acquisitions Inc.                     
|Consolidated Hydro New Hampshire Inc.                                     |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Universal Inc.                        
|Consolidated Hydro New York Inc.                                          |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | Enel North America Inc.                   
|Consolidated Hydro Southeast Inc.                                         |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | CHI Acquisitions II Inc.                  
|Consolidated Pumped Storage Inc.                                          |  | Delaware  USA             |  | Electricity generation from renewable sources      |  | Enel North America Inc.                   
|Constructora Cerro Pitren Ltda                                            |  | Santiago (Chile)           |  | Electricity generation from renewable sources      |  | Agricola Y Constructora Rio Guanehue SA   
|Crosby Drive Investments Inc.                                             |  | Massachusetts  USA        |  | Electricity generation from renewable sources      |  | Asotin Hydro Company Inc.                 
|Dalmazia Trieste S.r.l.                                                   |  | Rome (Italy)               |  | Real estate management                             |  | Cise S.r.l.                               

2



---



##### 



|                                                              |  |                            |  |                                                                                                      |  |                                                      
|------------------------------------------------------------- |  | -------------------------- |  | ---------------------------------------------------------------------------------------------------- |  | -----------------------------------------------------
|Company Name                                                  |  | Registered Office          |  | Activity                                                                                             |  | Held by                                              
|                                                              |  |                            |  |                                                                                                      |  | Enel Servizi S.r.l.                                  
|Decom Slovakia spol. s.r.o.                                   |  | Trnava (Slovakia)          |  | Engineering                                                                                          |  | Slovenské Elektràrne AS                              
|Deval S.p.A.                                                  |  | Aosta (Italy)              |  | Electricity distribution Valle DAostain                                                             |  | Enel S.p.A.                                          
|Deval Energie S.r.l.                                          |  | Aosta (Italy)              |  | Sale of electricity                                                                                  |  | Deval S.p.A.                                         
|Easygas S.r.l.                                                |  | Milan (Italy)              |  | Gas sale                                                                                             |  | Enel Gas S.p.A.                                      
|EGI Costa Rica Viento SA                                      |  | Santa Ana
    (Costa Rica) |  | Electricity generation from renewable sources                                                        |  | Energia Global de Costa Rica SA                      
|Electra de Viesgo Distribuciòn SL                             |  | Santander (Spain)          |  | Distribution and sale of electricity                                                                 |  | Enel Distribuzione S.p.A.                            
|Electrificadora Ecologica SA                                  |  | Santa Ana
    (Costa Rica) |  | Electricity generation from renewable sources                                                        |  | ZMZ General SA                                       
|Empresa Electrica Panguipulli SA                              |  | Santiago (Cile)            |  | Electricity generation from renewable sources                                                        |  | Energia de Los Lagos Ltda                            
|                                                              |  |                            |  |                                                                                                      |  | Energia Alerce Ltda                                  
|Empresa Electrica Puyehue SA                                  |  | Santiago (Cile)            |  | Electricity generation from renewable sources                                                        |  | Energia de Los Lagos Ltda                            
|                                                              |  |                            |  |                                                                                                      |  | Energia Alerce Ltda                                  
|Empresa nacional de Geotermia SA                              |  | Santiago (Cile)            |  | Electricity generation from renewable sources                                                        |  | Enel Cile Ltda                                       
|Enel Servizi S.r.l. (previously Enel Ape S.r.l.)              |  | Rome (Italy)               |  | Personnel administration activities, real estate and facility
    management, information technology |  | Enel S.p.A.                                          
|Enel Capital S.r.l.                                           |  | Rome (Italy)               |  | Venture capital                                                                                      |  | Enel S.p.A.                                          
|Enel Comercializadora de Gas SA                               |  | Madrid (Spain)             |  | Sale of gas and electricity                                                                          |  | Enel Trade S.p.A.                                    
|Enel Distribuzione S.p.A.                                     |  | Rome (Italy)               |  | Electricity distribution                                                                             |  | Enel S.p.A.                                          
|Enel Electrica Banat SA (previously Electrica Banat SA)       |  | Timisoara (Romania)        |  | Electricity distribution                                                                             |  | Enel Distribuzione S.p.A.                            
|Enel Electrica Dobrogea SA (previously Electrica Dobrogea SA) |  | Constanta (Romania)        |  | Electricity distribution                                                                             |  | Enel Distribuzione S.p.A.                            
|Enel Energia S.p.A.                                           |  | Rome (Italy)               |  | Sale of electricity                                                                                  |  | Enel S.p.A.                                          
|Enel Energy Europe S.r.l.                                     |  | Rome (Italy)               |  | Holding company                                                                                      |  | Enel S.p.A.                                          
|Enel ESN Energo LLC                                           |  | Moscow (Russia)            |  | Management and maintenance of electricity generation plants                                          |  | Enel ESN Management BV                               
|Enel ESN Management BV                                        |  | Amsterdam (Holland)        |  | Holding company                                                                                      |  | Enel Produzione S.p.A.                               
|Enel.Factor S.p.A.                                            |  | Rome (Italy)               |  | Factoring                                                                                            |  | Enel S.p.A.                                          
|Enel Finance International SA                                 |  | Luxembourg                 |  | Finance                                                                                              |  | Enel S.p.A.                                          
|Enel Gas S.p.A.                                               |  | Milan (Italy)              |  | Sale of gas and electricity                                                                          |  | Enel Distribuzione S.p.A.                            
|Enel Green Power International SA                             |  | Luxembourg                 |  | Holding of foreign companies operating in the electricity
    generation from renewable sources      |  | Enel Produzione S.p.A.
    Enel Investment Holding BV
|Enel Investment Holding BV                                    |  | Amsterdam (Holland)        |  | Holding company                                                                                      |  | Enel S.p.A.                                          
|Enel Ireland Finance Ltd                                      |  | Dublin (Ireland)           |  | Finance                                                                                              |  | Enel Finance International SA                        
|Enel Latin America LLC (previously EGI LLC)                   |  | Delaware  USA             |  | Electricity generation from renewable sources                                                        |  | Enel Green Power International SA                    
|Enel M@p S.p.A.                                               |  | Rome (Italy)               |  | Services                                                                                             |  | Enel Distribuzione S.p.A.                            

3



---



##### 



|                                                                            |  |                         |  |                                                      |  |                                                                     
|--------------------------------------------------------------------------- |  | ----------------------- |  | ---------------------------------------------------- |  | --------------------------------------------------------------------
|Company Name                                                                |  | Registered Office       |  | Activity                                             |  | Held by                                                             
|Enel.NewHydro S.r.l.                                                        |  | Rome (Italy)            |  | Engineering, hydro systems                           |  | Enel S.p.A.                                                         
|Enel North America Inc. (previously CHI Energy Inc.)                        |  | Connecticut  USA       |  | Electricity generation from renewable sources        |  | Enel Green Power International SA                                   
|Enelpower S.p.A.                                                            |  | Milan (Italy)           |  | Engineering and contracting                          |  | Enel S.p.A.                                                         
|Enelpower Contractor and Development Saudi Arabia Ltd                       |  | Riyadh (Saudi Arabia)   |  | Power plant construction, management and maintenance |  | Enelpower S.p.A.                                                    
|Enelpower do Brasil Ltda                                                    |  | Rio de Janeiro (Brasil) |  | Engineering and contracting                          |  | Enelpower S.p.A.                                                    
|Enelpower UK Ltd                                                            |  | London (United Kingdom) |  | Engineering and contracting                          |  | Enelpower S.p.A.                                                    
|Enel Produzione S.p.A.                                                      |  | Rome (Italy)            |  | Electricity generation                               |  | Enel S.p.A.                                                         
|Enel.Re Ltd                                                                 |  | Dublin (Ireland)        |  | Reinsurance                                          |  | Enel Investment Holding BV                                          
|Enel Rate Gas S.p.A. (previously Camuzzi Gazometri S.p.A.)                  |  | Milan (Italy)           |  | Natural gas distribution and sales; waste management |  | Enel Distribuzione Gas S.p.A.                                       
|Enel Service UK Ltd                                                         |  | London (United Kingdom) |  | Services                                             |  | Enel Trade S.p.A.                                                   
|Enel Servicii S.r.l.                                                        |  | Bucarest (Romania)      |  | Services                                             |  | Enel S.p.A.                                                         
|                                                                            |  |                         |  |                                                      |  | Enel Distribuzione S.p.A.                                           
|Enel.si  Servizi integrati S.r.l.                                          |  | Rome (Italy)            |  | Engineering and energy related services              |  | Enel S.p.A.                                                         
|Enel Sole S.r.l. (previously Società luce elettrica S.p.A.
    Gruppo Enel) |  | Rome (Italy)            |  | Public lighting system                               |  | Enel S.p.A.                                                         
|Enel Trade S.p.A.                                                           |  | Rome (Italy)            |  | Fuel trading and logistics  Sale of electricity     |  | Enel S.p.A.                                                         
|Enel Viesgo Energia SL (previously Viesgo Energia SL)                       |  | Santander (Spain)       |  | Sale of electricity and natural gas                  |  | Electra de Viesgo Distribucion SL                                   
|Enel Viesgo Generaciòn SL (previously Viesgo
    Generaciòn SL)             |  | Santander (Spain)       |  | Generation and sale of electricity                   |  | Enel Produzione S.p.A.                                              
|Enel Viesgo Renovables SL                                                   |  | Santander (Spain)       |  | Holding company                                      |  | Viesgo Generacion SL                                                
|Enel Viesgo Servicios SL                                                    |  | Santander (Spain)       |  | Services                                             |  | Enel S.p.A.
    Enel Produzione S.p.A.
    Enel Distribuzione S.p.A.
|Energia Alerce Ltda                                                         |  | Santiago (Cile)         |  | Electricity generation from renewable sources        |  | Enel Latin America LLC
    Green Power International SA             
|Enel Chile Ltda (previously Energia de Los Lagos Ltda)                      |  | Santiago (Cile)         |  | Electricity generation from renewable sources        |  | Energia Alerce Ltda
    Enel Latin America LLC                      
|Energia Global SA de cv                                                     |  | Massachusetts  USA     |  | Electricity generation from renewable sources        |  | Enel Latin America LLC                                              
|Energia Global de Costa Rica SA                                             |  | Santa Ana (Costa Rica)  |  | Electricity generation from renewable sources        |  | Enel Latin America LLC                                              
|Energia Global Operaciones SA                                               |  | Santa Ana (Costa Rica)  |  | Electricity generation from renewable sources        |  | Energia Global de Costa Rica SA                                     
|Energosluzby AS                                                             |  | Trnava (Slovakia)       |  | Services                                             |  | Slovenské Elektràrne AS                                             
|Essex Company                                                               |  | Massachusetts  USA     |  | Electricity generation from renewable sources        |  | Enel North America Inc.                                             

4



---



##### 



|                                                 |  |                            |  |                                               |  |                                                             
|------------------------------------------------ |  | -------------------------- |  | --------------------------------------------- |  | ------------------------------------------------------------
|Company Name                                     |  | Registered Office          |  | Activity                                      |  | Held by                                                     
|Florence Hills LLC                               |  | Minnesota  USA            |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC                                      
|Fulcrum Inc.                                     |  | Idaho  USA                |  | Electricity generation from renewable sources |  | Consolidated Hydro Mountain States Inc.                     
|Gauley Hydro LLC                                 |  | Delaware  USA             |  | Electricity generation from renewable sources |  | Essex Company                                               
|Gauley River Management Corporation              |  | Vermont  USA              |  | Electricity generation from renewable sources |  | CHI Finance LLC                                             
|Generadora de Occidente Ltda                     |  | Guatemala                  |  | Electricity generation from renewable sources |  | Enel Latin America LLC
    Enel Guatemala SA                
|Generadora Montecristo SA                        |  | Guatemala                  |  | Electricity generation from renewable sources |  | Enel Latin America LLC
    Enel Guatemala SA                
|Geotermica Nicaraguense SA                       |  | Managua (Nicaragua)        |  | Electricity generation from renewable sources |  | Enel Produzione S.p.A.                                      
|Gestion Cogeneration Inc.                        |  | Quebec  Canada            |  | Electricity generation from renewable sources |  | Hydrodev Inc.                                               
|Grupo EGI SA de cv                               |  | San Salvador (El Salvador) |  | Electricity generation from renewable sources |  | Enel Latin America LLC
    Enel Green Power International SA
|Hadley Ridge LLC                                 |  | Minnesota  USA            |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC                                      
|Hera Rete Modena S.r.l.                          |  | Bologna (Italy)            |  | Electricity distribution                      |  | Enel Distribuzione S.p.A.                                   
|Highfalls Hydro Company Inc.                     |  | Delaware  USA             |  | Electricity generation from renewable sources |  | CHI Finance LLC                                             
|Hope Creek LLC                                   |  | Minnesota  USA            |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC                                      
|Hosiery Mill Hydro Company Inc.                  |  | Delaware  USA             |  | Electricity generation from renewable sources |  | CHI Acquisitions Inc.                                       
|Hydrodev Inc.                                    |  | Québec  Canada            |  | Electricity generation from renewable sources |  | CHI Canada Inc.                                             
|Hydro Development Group Inc.                     |  | New York  USA             |  | Electricity generation from renewable sources |  | CHI Acquisitions II Inc.                                    
|Hydro Energies Corporation                       |  | Vermont  USA              |  | Electricity generation from renewable sources |  | CHI Finance Inc.                                            
|Hydro Finance Holding Company Inc.               |  | Delaware  USA             |  | Electricity generation from renewable sources |  | Enel North America Inc.                                     
|Hydrogen Park  Marghera per lidrogeno S.c.r.l. |  | Venice (Italy)             |  | Electricity generation from renewable sources |  | Enel Produzione S.p.A.                                      
|Iridea S.r.l.                                    |  | Milan (Italy)              |  | Consultancy services                          |  | Enel Gas S.p.A.                                             
|Jack River LLC                                   |  | Minnesota  USA            |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC                                      
|Jessica Mills LLC                                |  | Minnesota  USA            |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC                                      
|Julia Hills LLC                                  |  | Minnesota  USA            |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC                                      
|Kings River Hydro Company Inc.                   |  | Delaware  USA             |  | Electricity generation from renewable sources |  | CHI Finance LLC                                             
|Kinneytown Hydro Company Inc.                    |  | Delaware  USA             |  | Electricity generation from renewable sources |  | Enel North America Inc.                                     
|LaChute Hydro Company Inc.                       |  | Delaware  USA             |  | Electricity generation from renewable sources |  | Enel North America Inc.                                     
|Lawrence Hydroelectric Associates LP             |  | Massachusetts  USA        |  | Electricity generation from renewable sources |  | Essex Company Crosby Drive Investments Inc.                 

5



---



##### 



|                                             |  |                         |  |                                               |  |                                       
|-------------------------------------------- |  | ----------------------- |  | --------------------------------------------- |  | --------------------------------------
|Company Name                                 |  | Registered Office       |  | Activity                                      |  | Held by                               
|Littleville Power Company Inc.               |  | Massachusetts  USA     |  | Electricity generation from renewable sources |  | Hydro Development Group Inc.          
|Lower Saranac Corporation                    |  | New York  USA          |  | Electricity generation from renewable sources |  | Twin Saranac Holdings LLC             
|Maritza East III Power Company AD            |  | Sofia (Bulgaria)        |  | Electricity generation                        |  | Maritza East III Power Holding BV     
|Maritza East III Power Holding BV            |  | Amsterdam (Holland)     |  | Holding company                               |  | Enel Produzione S.p.A.                
|Mascoma Hydrom Corporation                   |  | New Hampshire  USA     |  | Electricity generation from renewable sources |  | CHI Acquisitions II Inc.              
|Metanodotti Padani S.p.A.                    |  | Milan (Italy)           |  | Gas distribution                              |  | Enel Rete Gas S.p.A.                  
|Metanodotti Trentini S.r.l.                  |  | Milan (Italy)           |  | Gas distribution                              |  | Metanodotti Padani S.p.A.             
|Metro Wind LLC                               |  | Minnesota  USA         |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC                
|Mill Shoals Hydro Company Inc.               |  | Delaware  USA          |  | Electricity generation from renewable sources |  | CHI Finance LLC                       
|Minnewawa Hydro Company Inc.                 |  | Delaware  USA          |  | Electricity generation from renewable sources |  | Enel North America Inc.               
|Molinos de Viento del Arenal SA              |  | Santa Ana (Costa Rica)  |  | Electricity generation from renewable sources |  | Electrificadora Ecologica SA          
|Motherlode Hydro Inc.                        |  | California  USA        |  | Electricity generation from renewable sources |  | CHI West Inc.                         
|Newind Group Inc.                            |  | Newfoundland  Canada   |  | Electricity generation from renewable sources |  | CHI Canada Inc.                       
|Northwest Hydro Inc.                         |  | Delaware  USA          |  | Electricity generation from renewable sources |  | CHI West Inc.                         
|Notch Butte Hydro Company Inc.               |  | Delaware  USA          |  | Electricity generation from renewable sources |  | CHI Finance LLC                       
|Ochrana a bezpecnost SE AS                  |  | Mochovce (Slovakia)     |  | Security Services                             |  | Slovenské Elektràrne AS               
|Olympe Inc.                                  |  | California  USA        |  | Electricity generation from renewable sources |  | CHI West Inc.                         
|Operacion Y Mantenimiento Tierras Morenas SA |  | Santa Ana (Costa Rica)  |  | Electricity generation from renewable sources |  | Electrificadora Ecologica SA          
|Ottauquechee Hydro Company Inc.              |  | Delaware  USA          |  | Electricity generation from renewable sources |  | CHI Finance LLC                       
|Pelzer Hydro Company Inc.                    |  | Delaware  USA          |  | Electricity generation from renewable sources |  | Consolidated Hydro Southeast Inc.     
|P.H. Don Pedro SA                            |  | Santa Ana (Costa Rica)  |  | Electricity generation from renewable sources |  | Energia Global de Costa Rica SA       
|P.H. Guacimo SA                              |  | Santa Ana (Costa Rica)  |  | Electricity generation from renewable sources |  | EGI LLC Energia Globa de Costa Rica SA
|P.H. Rio Volcan SA                           |  | Santa Ana (Costa Rica)  |  | Electricity generation from renewable sources |  | Energia Global de Costa Rica SA       
|Pragma Energy SA                             |  | Lugano (Switzerland)    |  | Coal trading                                  |  | Enel Investment Holding BV            
|Pragma Energy Services Ltd                   |  | London (United Kingdom) |  | Administrative services                       |  | Pragma Energy SA                      
|Reti Gas S.c.r.l.                            |  | Bologna (Italy)         |  | Network construction in the gas sector        |  | Enel Rete Gas S.p.A.                  
|Ruthton Ridge LLC                            |  | Minnesota  USA         |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC                

6



---



##### 



|                                                                    |  |                        |  |                                               |  |                                     
|------------------------------------------------------------------- |  | ---------------------- |  | --------------------------------------------- |  | ------------------------------------
|Company Name                                                        |  | Registered Office      |  | Activity                                      |  | Held by                             
|Sfera  Società per la formazione e le risorse
    aziendali S.r.l. |  | Rome (Italy)           |  | Human resources                               |  | Enel S.p.A.                         
|Sheldon Vermont Hydro Company Inc.                                  |  | Delaware  USA         |  | Electricity generation from renewable sources |  | Boot Sheldon Holdings LLC           
|Simeo S.r.l.                                                        |  | Milan (Italy)          |  | Gas distribution                              |  | Enel Rete Gas S.p.A.                
|Slate Creek Hydro Company Inc.                                      |  | Delaware  USA         |  | Electricity generation from renewable sources |  | CHI Acquisitions II Inc.            
|Slovenskè Elektràrne AS                                             |  | Bratislaw (Slovakia)   |  | Electricity generation                        |  | Enel Produzione S.p.A.              
|Slovenskè Elektràrne CR s.r.o                                       |  | Brno (Slovakia)        |  | Finance                                       |  | Slovenskè Elektràrne AS             
|Slovenské Elektràrne Finance BV                                     |  | Rotterdam (Holland)    |  | Finance                                       |  | Slovenskè Elektràrne AS             
|So.l.e. Milano H Scrl                                               |  | Rome (Italy)           |  | Construction of public lighting systems       |  | Enel Sole S.r.l.                    
|Soliloquoy Ridge LLC                                                |  | Minnesota  USA        |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC              
|Somersworth Hydro Company Inc.                                      |  | Delaware  USA         |  | Electricity generation from renewable sources |  | CHI Universal Inc.                  
|Southwest Transmission LLC                                          |  | Minnesota  USA        |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC              
|Spartan Hills LLC                                                   |  | Minnesota  USA        |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC              
|Summit Energy Storage Inc.                                          |  | Delaware  USA         |  | Electricity generation from renewable sources |  | Enel North America Inc.             
|Sun River LLC                                                       |  | Minnesota  USA        |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC              
|Sweetwater Hydroelectric Inc.                                       |  | New Hampshire  USA    |  | Electricity generation from renewable sources |  | CHI Acquisitions II Inc.            
|Tecnoguat SA                                                        |  | Guatemala              |  | Electricity generation from renewable sources |  | Enel Latin America LLC              
|The Great Dam Corporation                                           |  | Massachusetts  USA    |  | Electricity generation from renewable sources |  | Lawrence Hydroelectric Associates LP
|TKO Power Inc.                                                      |  | California  USA       |  | Electricity generation from renewable sources |  | CHI West Inc.                       
|Tsar Nicholas LLC                                                   |  | Minnesota  USA        |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC              
|Twin Falls Hydro Company Inc.                                       |  | Delaware  USA         |  | Electricity generation from renewable sources |  | Twin Saranac Holdings LLC           
|Twin Lake Hills LLC                                                 |  | Minnesota  USA        |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC              
|Twin Saranac Holdings LLC                                           |  | Delaware  USA         |  | Electricity generation from renewable sources |  | Enel North America Inc.             
|Vyzkont s.r.o                                                       |  | Trnava (Slovakia)      |  | Manufacturing of fibre containers             |  | Slovenskè Elektràrne AS             
|Water & Industrial Services Company S.p.A:                          |  | Rome (Italy)           |  | Water depuration                              |  | Enel. NewHydro S.r.l.               
|Western New York Wind Corporation                                   |  | New York  USA         |  | Electricity generation from renewable sources |  | Enel North America Inc.             
|Willimantic Power Corporation                                       |  | Connecticut  USA      |  | Electricity generation from renewable sources |  | CHI Acquisitions Inc.               
|Winters Spawn LLC                                                  |  | Minnesota  USA        |  | Electricity generation from renewable sources |  | CHI Minnesota Wind LLC              
|ZMZ General SA                                                      |  | Santa Ana (Costa Rica) |  | Electricity generation from renewable sources |  | EGI Costa Rica Viento SA            

7