The sun intensity varies during the day and with weather. The Insolation number is the *efective* number of full hours of sunlight for an area. When figuring out how much sun you get for calculating daily output of solar panels, you need to use the insolation for your area (Not hours of sunlight). These maps will give you an insolation number for where you are
WORLD WIDE MAP:
https://re.jrc.ec.europa.eu/pvg_tools/en/tools.html#MR
US MAP:
To get the map, click on the Orange "Go to Download" button in the upper right of this page.
EDIT 5/25/2020 : Added link to world wide map.
WORLD WIDE MAP:
https://re.jrc.ec.europa.eu/pvg_tools/en/tools.html#MR
US MAP:
To get the map, click on the Orange "Go to Download" button in the upper right of this page.
Solar Insolation Map: How Many Sun Hours Do You Get? | Wholesale Solar
This US solar insolation map shows how many sun hours you get, which impacts how much electricity your solar system will produce.
diysolarforum.com
EDIT 5/25/2020 : Added link to world wide map.