: It determines the yield and solar fraction of a system based on your location and basic heat demand.
If you are looking for a free download or tool, Valentin Software provides these specific paths: Valentin TSOL Free Download
: Calculates energy performance across a year with a 6-minute resolution. : It determines the yield and solar fraction
While there is no permanent "free" version of the full desktop software, you can access the Valentin Software T*SOL toolset for free through a or a simplified online calculator . Valentin TSOL Free Download
: Best for quick estimates before moving to the detailed desktop application.
: You can download a full-featured trial of T*SOL 2026 to test its capabilities on your computer.
: Pre-loaded with over 2,000 global climate data locations and 200+ pre-configured solar thermal systems.