1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
4. National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
5. Univ. of Colorado, Boulder, CO (United States)
6. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)