The Secretary shall use amounts appropriated under this section to make grants for use in carrying out renewable energy projects.
Not later than 180 days after December 19, 2007, the Secretary shall set forth criteria for use in awarding grants under this section.
Each eligible applicant that receives a grant under this subsection shall contribute to the total cost of the renewable energy project constructed by the eligible applicant an amount not less than 50 percent of the total cost of the project.