I had mine installed just over 2 years ago....It produced all the electric I needed per year and then some. I have since converted to all electric, minus our oil furnace (We dont actually use much oil since we installed our woodstove), purchased a plug-in hybrid. The issue is getting a company to add panels to our system. I would really like to get back to having no electric bill, but can't complain because despite the high electricity costs, for our vehicle it is still cheaper to charge at home than it is for a gallon of gas....