a working laboratory for interconnection and systems integration testing. This facility includes generation, storage, and interconnection technologies as well as electric power system equipment capable of simulating a real-world electric system. The center is the first facility in the United States with a controllable grid interface test system that has fault simulation capabilities and allows manufacturers and system operators to conduct the tests required for certification in a controlled laboratory environment. It is the only system in the world that is fully integrated with two dynamometers and has the capacity to extend that integration to turbines in the field and to a matrix of electronic and mechanical storage devices, all of which are located within close proximity on the same site. Transportation and hydrogen systems research As the only national laboratory dedicated 100% to renewable energy and energy efficiency, NREL collaborates with industry, government, and research partners to create better: Electric, hybrid, fuel cell, and conventional vehicle technologies Biofuels, hydrogen, natural gas, propane, and petroleum-based fuels Charging and fueling infrastructure. Transportation research areas Commercial vehicle technologies Electric vehicle grid integration Energy storage Fuels performance Power electronics and electric machines Sustainable Mobility Initiative Systems analysis and integration Vehicle thermal management See also List of renewable energy organizations Renewable energy Renewable energy commercialization in the United States Simple Model of the Atmospheric Radiative Transfer of Sunshine (SMARTS), software published by NREL Notes References Further reading External links Energy research institutes Renewable energy organizations based in the United States United States Department of Energy national laboratories Federally Funded Research and Development Centers Buildings and structures in Golden, Colorado Research institutes in Colorado Battelle Memorial Institute Golden, Colorado 1974 establishments in Colorado