How do you calculate solar output generation? Enact Customer Success August 20, 2020 22:57 Updated ENACT utilizes the latest version of PV Watts, developed and maintained as the leading industry standard by the U.S. Department of Energy, National Renewable Energy Laboratory (NREL). Related articles What is on my Home Dashboard? System Loss Calculation How do I layout my panels? Does Enact account for Time of Use rate schedules and Demand Charges? Comments 0 comments Article is closed for comments.