The goal of this project is to establish the available capacity, value, and impacts of interconnecting hydrogen infrastructure and fuel cell electric vehicles to the electric grid. The first objective is to quantify the opportunity of utilizing flexibility from hydrogen systems to support the grid. The second objective is to develop and implement methods to assess optimal system configuration and operating strategy for grid-integrated hydrogen systems. Data products (e.g., equipment costs, market data, vehicle operation and fueling data) will be available for release to help establish a benchmark for future work.