We have had our solar power system setup on our home in Phoenix for over three months now. Thats three months where we havent spent a dime on electricity and more importantly have reduced the amount of pollution in the air. Our installation was done by Cambio Energy a local company and good group of people. They set us up with an Enphase system which gives us monthly updates on our systems effectiveness.
One of the coolest features is the comparison of how much power we have created and how much pollution we have reduced. This image is a screen shot of what the Enphase website calculates for us: