A few things of interest here:
1) The total area of the 10 panels is just under 150 square feet, here I am brushing snow off of one of the strings (rows) of panels, a typical system would be made up of two or three strings of equal size.

2) The first year i was very anal about cleaning and positioning the panels for maximum exposure, the average output for the 1.9kw system was 9.17Kw a day, the following year I just set the panels to the average yearly angle and did nothing else. The aerage output as a result was 9.1Kw a day