What is the difference between vacuum-tube and flat-panel solar units?
27 Mar 2013

Vacuum-tube solar water panels, during the summer, perform the same as any flat surface panel; during winter there is slightly better performance due to their ability to better insulate the fluid from the outside air temperature.

These types of panels are used primarily in colder countries where there is a risk of freezing temperatures during winter months. In countries with no risk of frost, the difference is almost negligible.