Solar water heating systems have a solar collector that faces the Solar and either heats water instantly or heats a "Doing work fluid" that, subsequently, is utilized to warmth drinking water. For more information on putting in a solar water heating system, remember to see the California Solar Initiative (CSI). https://www.americanarraysolar.com/how-do-the-solar-installers-fresno-decide-which-solar-panels-to-install/