When President Obama signs the $858 billion tax package that was passed by Congress, he will also be giving a one-year extension of a popular incentive program for renewable energy projects. The Treasury program, also known as 1603 Treasury cash grants, covers up to 30% of the cost of alternative energy projects and was due to expire on December 31. According to some industry analysts, it has supported more than 100,000 jobs and $18 billion in investment for thousands of installations.