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The National Renewable Energy Laboratory’s REopt™ Lite software is a free online tool designed to help federal agencies, building owners, developers, utilities, and researchers find the most cost-effective and resilient energy solution for a specific site. REopt Lite evaluates the economic viability of solar PV, battery storage, and wind energy at a site, identifies system sizes and battery dispatch strategies to minimize energy costs, and estimates how long a system can sustain a site’s critical load during a grid outage. The software delivers powerful insights with as few as three site-specific inputs, allowing users to evaluate the tradeoffs between initial capital expenditures and reduced utility costs over the project lifetime. Learn more at

Produced by the National Renewable Energy Laboratory for the EERE Federal Energy Management Program

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