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The System Advisor Model, published by the National Laboratory of the Rockies, is a free desktop application designed for the techno-economic analysis of energy technologies. The software falls within the energy analysis and engineering software category, serving users who need to evaluate both the technical performance and the economic characteristics of energy systems within a single desktop environment. As a techno-economic analysis tool, its purpose is to support the assessment of energy technologies by combining technical modeling considerations with economic evaluation, making it relevant to use cases such as comparing energy technology options, studying the costs associated with different systems, and conducting project feasibility assessments. Because the application is distributed at no cost, it is accessible to a broad range of users, including researchers, analysts, engineers, project developers, students, and other professionals working with energy technology evaluations, without requiring a paid license. The desktop format means the software is installed and run locally on a user's computer rather than accessed as a web-based service, which suits workflows where analysts prefer a dedicated, self-contained application for their modeling work. The current version of the System Advisor Model is 2025.4.16, and according to the available version data, one version is presently listed in the catalog, indicating that 2025.4.16 is the release users can obtain at this time. The version numbering suggests a date-oriented release scheme consistent with ongoing maintenance and periodic updates. Overall, the System Advisor Model occupies a distinct position in the energy software landscape as a no-cost, desktop-based solution for techno-economic analysis, combining the practical accessibility of free distribution with the specialized functionality required for evaluating energy technologies from both technical and financial perspectives, all under the stewardship of the National Laboratory of the Rockies as its publisher and developer.
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