Reuters: U.S. President Barack Obama set the goal: double U.S. renewable energy production in three years. Congress provided the incentives as part of the $787 billion stimulus package. Still, it may take awhile for solar and wind energy companies to get new business and the smart grid to transmit those power supplies. People in the industries say the stimulus will help speed the process, but it still may not be fast enough to meet the Obama administration’s goal of ramping up renewable …