This grant provides ongoing support to Pecan Street, a non-profit research organization based in Austin, Texas seeking to improve researchers’ access to high resolution residential electricity use data by instrumenting households with energy monitoring devices. Pecan Street installs eGauge devices in participating households to directly measure power flow at the level of the circuit breaker. Each household gets access to their own energy use information, and Pecan Street collects and uploads the data to Dataport, a data sharing system for academic and commercial researchers. Grant funds will allow Pecan Street to greatly expand and diversify the number of instrumented homes in the research testbed by 40%, adding at least 50 homes in each of 4 different geographies, 210 homes in total: Atlanta, Georgia; Central Pennsylvania; Oklahoma City, Oklahoma; and Portland, Oregon. All of the newly instrumented homes supported in this project will be from communities of color or lower-income communities not yet represented in Pecan Street’s network. Pecan Street will work closely with academic researchers and local community-based organizations (CBO) in each region to engage participating households and use the collected data to study questions of interest to that particular area. Funds will allow Pecan Street to engage 750 new Dataport users, produce 10-20 journal publications, train multiple graduate students across the four local research projects, support the involvement of the CBOs, and update the Dataport infrastructure with upgraded storage and computer processing capacity. This effort will improve our ability to understand household electricity usage and, ultimately, help to facilitate the transition to low-carbon energy systems.