January 12 (SeeNews) - Spanish conglomerate Acciona SA (BME:ANA) is preparing to sell down 8% of its renewable energy subsidiary Corporacion Acciona Energias Renovables, or Acciona Energia (BME:ANE), in a deal that could fetch between EUR 800 million (USD 906.9m) and EUR 1 billion, Spanish finance newspaper Cinco Dias reported on Wednesday.