@markpj23, I think you are off on your expected kwh per day calculations. I live in north Louisiana which does not have the sunshine potential you do, and I get considerably better production than you are estimating. I have 10.4 kw of solar, in three arrays, facing SE, SW & South. I can get 50+kwh's per day on a full sunny day in the summer, and up to 40kwh in the winter. And that is using a grid tie Schneider XW6048. By using direct grid connect, with no batteries, better pv panel sun orientation than I have, and a 10kw inverter, you should get a good bit more. Maybe twice what you have figured. And that would make your potential payback look much better.