1. Argonne National Laboratory (ANL), Argonne, IL (United States)
2. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
3. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
4. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
5. Sandia National Lab. (SNL-CA), Livermore, CA (United States)