• PVGIS (PV-GIS)

    PVGIS is an online free solar photovoltaic energy calculator for stand alone or connected to the grid PV systems and plants, in Europe, Africa, America and Asia. Solar electricity generator simulation and solar

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  • EASY-PV

    With Easy-PV you can easily create a PV project online for free. You can create an instant schematic and use the performance calculator to estimate PV system output. Easy-PV was designed and built by the folks at Midsummer Solar Wholesale.

  • OpenSolarDB : open Solar database

    OpensolarDB is a database with average global daily solar radiation data for each month of the year as measured on the ground. The uniqueness of this solar database is that it is open for everybody, open for extracting data and open for

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  • SHW - Simulation Software for Thermal Solar Systems

    SHW is a simulation software for Thermal Solar Systems. It is a freeware for Research and Teaching use.
    Designed from unit of Energy Efficient Buildings at the University of Innsbruck, Austria.
    No Online help is

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  • SIMSOL

    Software dedicated to large hot water systems as hotels, industry, camping...

    NO MORE AVAILABLE! It has been replaced by TRANSOL, see on Professional solar thermal

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  • How to get solar radiation and climate data (precipitaton, temperature, wind, insolation...) anywhere in the world free from NASA database?

    Get worlwide climate data for free from NASA in 3 steps ?


    This tutorial helps you to get free set of meteorological data from NASA database through the POWER DATA ACCESS VIEWER online free tool.

    Particularly you will...
  • PVWATTS free solar calculator

    PVWatts is a useful map-based free online software for US and international photovoltaic sites analysis.
    It could give the global annual energy output of PV systems connected to the grid in USA or in many part of the world. For many

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  • Solar Water Heating Calculation (SWH calculator, by California Energy Commission)

    Solar Water Heating Calculation for built up system.
    Note to Users: California F-Chart has been designed to calculate solar thermal water heating contributions for built up solar systems.

  • Solcast - Solar Irradiance Data

    Solcast - Solar Irradiance Data Solcast offers global coverage of historical (up to 15y), recent (past 3 months) and live (past 7 days) solar irradiance data.
    Free data access for researchers and hobbyists (home PV system use)....
  • FREE Solar thermal softwares

    This section provide a list of free solar thermal softwares.