From the Executive Summary: "Researchers at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) developed the Puerto Rico Energy Efficiency Scenario Analysis Tool (PREESAT) to inform decisions on energy efficiency programs in Puerto Rico, especially those formed to help attain the 30% energy reduction targets set out in P.L. 17-2019. PREESAT is a spreadsheet based customizable scenario tool, in which users can toggle input values and develop scenarios to reach certain levels of energy reductions from energy efficiency. This report provides a background of the energy sector in Puerto Rico, an introduction to PREESAT, user guidance on how to use PREESAT (including separate guidance for the residential, commercial, and industrial input tabs), and sample scenarios illustrating example results."
Technical Report NREL/TP-6A20-79977
National Renewable Energy Laboratory: https://www.nrel.gov/index.html