You can define your own system components and load profiles via this menu item. In T*SOL, you can save collectors, air collectors, and auxiliary heatings[^1^]. These databases are maintained and updated by the manufacturers of the components (e.g., PV modules), themselves, and we make them available to you as biweekly database updates.
Do you miss any equipment? Send an email to info@valentin-software.com, and we will refer your request to the right contact of the manufacturer, who is in charge of their database entries.
Also see:
[1]: Note: Tanks are also available in T*SOL Expert.