The following map and chart show the average daily solar insolation levels across the United States, including Alaska and Hawaii.  Simply locate your town or city (approximate location) on the map, match the color of the map to the chart below, and determine what your typical peak solar hours are.  Essentially, solar insolation refers to the amount of energy that is received on a given surface over a period of time, which can then be used to determine how much energy can be generated by a solar panel or collector at your location – an essential tool in sizing and rating a solar hot water (or PV) system for you.

Solar Insolation Chart and Map

Ideally, you would like your Solar Insolation Levels to be as high as possible, but this is, of course, not up to you. However, solar systems (both PV and Thermal) have good success in levels as low as 2 to 3, such as New York State. A SunMaxx Professional can assist you in applying your Solar Insolation Levels to the efficiency and size of SunMaxx Solar Hot Water Heater for you.