Valentin Software TSOL 2026 R1

The design and simulation software for solar thermal systems. T*SOL is a dynamic simulation program for the design, optimization and calculation of solar thermal systems.

T*SOL is the simulation program with which you can calculate the yield of a thermal solar system. No matter whether for domestic water heating, heating support, swimming pools or process heat, with T*SOL you can optimally design your planned solar thermal system, dimension storage and collector arrays (also east / west roofs) and determine the economic efficiency.

At the start of the design process, you have a large selection of all relevant systems for domestic hot water heating and heating support, as well as for swimming pools and process heat. During the design, you will be supported with dimensioning suggestions and can use a parameter variation to find the optimal combination, e.g. of storage size and collector area.

After the simulation you will receive a comprehensive and appealing project report with all system data as well as detailed simulation and profitability results. This report also contains all the data necessary to be recognized as evidence by BAFA.

Graphic representation of the simulation results
The parameters of the simulation results such as energies, temperatures or volumes can be displayed graphically. You can choose between different display formats such as bar charts and line graphs. The time axis can be varied between a day and up to a year. This offers many options for analyzing the system.

Simulation of the solar yield and the coverage of domestic hot water and heating
The dynamic annual simulation calculates temperatures and energies in time increments of one to six minutes. System parameters such as the efficiency and solar fraction are calculated from the simulation results.
Databases with solar collectors, boilers and storage tanks
T*SOL is delivered with an extensive database. This contains more than
4,000 collectors (flat plate collectors, tube collectors, air collectors)
5,000 heat generators (condensing boilers, wood boilers, pellet boilers, district heating, etc.)
600 storage tanks (combination and buffer storage, monovalent, bivalent, etc.)

Parameter variation
You can vary up to two parameters at the same time (e.g. collector area and storage volume) to find out the optimal values for the combination of target variables including “efficiency”, “solar fraction”, “additional energy” and “solar yield”