Solar thermal collectors harness the thermal energy emitted from the sun. First of all, cool water gets pumped through the solar collectors at the bottom. When the sun starts heating up the water, it emerges to the top where it can be utilized to warm the water of swimming pools, buildings and homes.There are two primary types of solar thermal collectors like glazed and unglazed solar thermal collectors. Unglazed solar collectors are less effective and restricted to warm climates and pools whose temperatures don’t reach below the freezing point.Moreover, a solar pool heating system needs both plumbing and electrical work. It’s highly recommended that you should contact a professional contractor to install the solar heating systems, especially if you are looking to install the system on your roof. Both the solar and pool contractors can install a solar pool heater; solar installers will be very much aware of any solar incentives that are available in your area.