Construction and deployment of the experimental testbed encountered scheduling delays, and completion was subsequently further delayed by curtailment of LANL operations due to the COVID-19 pandemic. Between March and October, LANL was in a state of "Limited Operations" such that only certain "mission-critical" work was performed with approximately 25% on-site staffing. In spite of this, much of the lab space preparation was executed and the five initial model house" units 1 were constructed and

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... installed during this period. Still, the pace of construction was impacted by difficulty in coordinating personnel and minimizing contact between workers. Currently, LANL is in the mode of "Normal Operations with Maximum Telework," which continues to limit the availability of on-site personnel. Nevertheless, Milestone 3 is now complete. This document describes the experiment as it is deployed and provides status for each task for this milestone. Milestone 3 is given in the SOPO as being due in quarter 4 (ending 6/10/2020) and is described thus: Milestone 3: Experimental testbed validated with Pecan Street data (LANL, Geller) Experimental testbed with 20 physical TCLs and a fully configurable (in terms of connectivity/quality) communication network used by the load controller. This testbed will be coupled to the simulation testbed, which will simulate additional loads and the distribution network. We will report our detailed experimental plans and photos of experimental system. The experimental testbed should accurately capture TCL real and reactive power consumption during normal operation to within 5% RMSE error with respect to actual TCL data collected by Pecan Street.