the limit to your size of array will be price or area, so take the number of panels you can afford or have room for, and multiply their combined stated peak power rate by the sun hours from the insolation map.
another complication, tracking panels will catch more sun than stationary ones, and the optimum angle for a fixed panel will depend on your lattitude.
The amount of solar radiation received at the outer surface of Earth%26#039;s atmosphere varied little from an average value of 1,366 watts per square meter (W/m²).