Excellent quality liquid for the solar panel. It raises the water temperature faster and more efficiently!!!

I use it in my solar panel. It seems good to me. I don't have experience with any other coolant fluid to be able to compare. Everything is okay so far

With ease, you can change the solar fluid for better performance and efficiency. First, dilute it in water, then stir, and finally fill the solar tank.

For use in solar panels, it's okay.
However, when I installed it in heating systems, after a year, leaks started in all the pipes.

German Quality, top coolant for closed circuits, I have been using it for years in solar water heaters. Top choice for closed circuit solar water heaters!