For the year 2010:
Over 2,300 kW hours generated
1988 kW hours predicted
Over $1,400 paid by Consumers Energy
Payback in less than 10 years at this rate
Equivalent to more than two tons of CO2 reductions(@1.7lb CO2/kW-hr)
About 40% of my annual household electric power use was supplied by my solar panels.
On a monthly basis the power generated looks like this:
You can tell I had a sunny spring and a rainy June!
The next chart compares the power generated with the power used by my house. I multiplied the power used by .4 to normalize it against the annual power generated by my solar panels. If I wanted to generate the same amount of power I used during the year, I would need to have 6 kilowatts of solar panels instead of the 2.45 kilowatts I have now.
Blue bars are generation, gray bars are power use. You can see that I took my vacation in the August use reading. The drop in use reflects less air conditioning needed while I am out of the house.