The companies said the two power plants in California, called Rio Bravo Poso and Rio Bravo Fresno, are owned jointly by Constellation Energy and North American Power Group (NAPG).
RBS Sempra Commodities (RBSSC), a joint venture between Royal Bank of Scotland Group (LSE: RBS) (RBS) and Sempra Energy, is to sell assets of its North American Power and Gas (NAPG) business.