Looks good, you did my dream project.
I was looking into that years ago. If I lived in Austin Texas it would have been worth it with the rebate the Electric Company giving for the panels. The payback was estimated to be 17 years.
But the Electric co-op I'm in gave no rebate and would charge for a extra meter and bought back the electricity at a low rate making the payback never happen.
Their moto was "We need a reliable source of electricity when the sun does not shine, therefore we will make it just another expense for you". Then they go to schools and talk about green energy. ?????
Hopefully things will change and the Co-op will be more cooperating.
I have an excellent metal south facing roof for an array of panels or would I need ground tracking to make it pay.
Would you mind sharing the cost involved and the number of years your before your payback on your investment? Was your Electric Company cooperative?