I just upgraded the solar system on our house. Went from 24 panels to 45. Generating capacity went from 6 kilowatt hours to 11.5.
To put this into perspective:
I live in Washington, DC so we get all four seasons with the winter and summer extremes. Summers tend to be quite hot with humidity, and winters tend to be fairly cold, but not much snow. The first 24 panels supplied almost 100% of the electric consumed by my family of 4 people in the months of April, May, June, October, and November. My electric bills for July, August, and September generally hovered around $35 per month to air condition our house. I now hope to add July, August, and September into that list. Winter months are bad for electrical usage because the heating system is an electric heat pump.