Free Software for use by Renewable Energy industry.


RETScreen Version 4
The RETScreen Clean Energy Project Analysis Software is a unique decision support tool developed with the contribution of numerous experts from government, industry, and academia. The software, provided free-of-charge, can be used worldwide to evaluate the energy production and savings, costs, emission reductions, financial viability and risk for various types of Renewable-energy and Energy-efficient Technologies (RETs). The software (available in multiple languages) also includes product, project, hydrology and climate databases, a detailed user manual, and a case study based college/university-level training course, including an engineering e-textbook.

In RETScreen Version 4, the software’s capabilities have been expanded from renewable energy, cogeneration and district energy, to include a full array of financially viable clean power, heating and cooling technologies, and energy efficiency measures. The international appeal of this decision support tool has been improved through the expansion of climate data, required by the tool, covering the entire surface of the planet, including central-grid, isolated-grid and off-grid areas, as well as through the translation of the software into 35 languages that cover roughly 2/3 of the world’s population.

Click here to download RETScreen 4 (46 MB).