12/22/2012 12:30PM (about solar noon in AZ) - for winter solstice shading performance. These are the solar hot water panels. System is AET (Alternate Energy Technologies) DX-120-96. DX = drainback. 120 = 120 gallon storage tank. 96 = 96 square feet collector area. The panels are AET AE-32 4'x8' flat-plate colletors.