California's most aggressive large-scale solar power developer today won a $1.6 billion loan guarantee from the federal government. The Department of Energy announced plans to direct the funds to Oakland-based BrightSource Energy Inc. for completion of a 392-megawatt solar-thermal generation facility in Ivanpah, Calif. The plant, which is expected to go live in 2013, is one of a handful of renewable energy projects to be streamlined by the Obama administration under the American Recovery and Reinvestment Act.