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Solar and Wind Energy Resource Assessment (SWERA)

About SWERAPowered by OpenEI


The Solar and Wind Energy Resource Assessment (SWERA) programme's Renewable Energy Resource Explorer (RREX) is a Web-based map viewer that displays data from SWERA, the United Nations Environment Programme (UNEP) renewable resource assessment program. The viewer allows users to select any location in the world and display annual average estimates for the solar and wind resource and climate data at the location. Downloadable monthly average data are also available for each location along with information about the data sources.


The Solar and Wind Energy Resource Assessment (SWERA) started in 2001 to advance the large scale use of renewable energy technologies by increasing the availability and accessibility of high quality solar and wind resource information. SWERA began as a pilot project with funding from the Global Environment Facility (GEF) and managed by the United Nations Environment Programme’s (UNEP) Division of Technology, Industry and Economics (DTIE) in collaboration with more than 25 partners around the world. With the success of the project in 13 pilot countries SWERA expanded in 2006 into a full programme. Its expanded mission is to provide high quality information on renewable energy resources for countries and regions around the world, along with the tools needed to apply these data in ways that facilitate renewable energy policies and investments.

Contributing Partners

A number of organizations have contributed data sets to the SWERA initiative.

Contributing partners include:


Please refer to the SWERA Guide for information on the SWERA system, to create new products for your country and for guidance on use of data within the SWERA system. SWERA guide.pdf

New Initiatives

ESMAP Initiative

The Energy Sector Management Assistance Program (ESMAP) in the World Bank is implementing a new initiative to support country-level resource mapping for biomass, small hydro, solar and wind. Funding is available for modeling, ground-based data collection, data analysis, GIS mapping, strategic environmental assessment, and policy integration. Further details are available on the ESMAP website, including links to GIS and measurement data outputs by country.