An official website of the United States government.
The Engineering Laboratory (EL) in collaboration with the Material Measurement Laboratory (MML) released the second National Institute of Standards and Technology (NIST) repository on the Federal LCA Commons (FLCAC): a set of building systems models built using data from the FLCAC. This repository contains single- and multi-silicon photovoltaic panel supply chain data. It includes silicon refining from metallurgical grade to single- and multi-crystalline silicon, and the manufacturing of wafers, cells, panels and laminates, as well as consumption mixes for 2018. Future updates are planned this year to include a residential photovoltaic system and its components: inverter, other electrical components, and mounting structure.
In addition, EL and MML updated NIST's Construction Materials repository (v1.2025-07.0). The repository now contains models for the production of five cement types, 82 concrete mixes—including nine U.S. national benchmark mix designs—and two gypsum boards. It also contains models for intermediary products from the production supply chain of cement, concrete and gypsum, such as clinker, aggregates, or gypsum paper. Future updates are planned this year to include regional benchmark concrete mixes.
Models in these repositories were developed as part of multi-program research activities at NIST across the Measurement Science for Building Systems Program in EL, Carbon Capture and Accounting Program in MML, and Circular Economy Program in MML. Some of the datasets included were used as part of two data gap analysis of the FLCAC, one published in NIST Technical Note 2338, the other part of an upcoming NIST Technical Note.