As you probably know Photovoltaic systems convert the sun’s light into usable energy through solar panels and inverters that convert that energy back to the grid and / or store in it a battery back up system.  Solar thermal systems are different in that they generate energy by capturing and boosting the sun’s heat. Heliocol says is best when trying to explain this at its most basic level "Have you ever turned on a garden hose left in the sun and felt warm or hot water pouring out? That’s solar thermal water heating at its most basic level."

This concept can cost efficiently and safely be used used for heating your pool or hot water for you home with the sun!