NEW YORK, Dec 7 (Reuters) - Sonnedix and Cubico, two renewable energy developers, are competing to buy Chilean solar power assets that Italy's Enel (ENEI.MI) has put on the block to help trim debt, sources familiar with the matter told Reuters. Consisting of around 500 megawatts (MW) of operating and newly built sites, the portfolio is expected to fetch up to 1 billion euros ($1 billion). Enel and Cubico declined to comment. Pension and infrastructure funds have been buying stakes in low-carbon energy generation for many years, attracted by their predictable returns. Additional reporting by Valentina Za and Francesca Landini in Milan; editing by Cynthia OstermanOur Standards: The Thomson Reuters Trust Principles.

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