If you want to sell back electricity, and don't want to waste time or money, then you need to contact the local electric company/cooperative and see what programs they have.
If you want to connect to the grid, your system and components must be approved by them and/or the local government. Some states make it easy and some don't. In Florida, where I live, you can get up to $20k back from the state for a home PV system, but you have to do it through a licensed contractor. The electric company has a lot more to lose than you do if something goes wrong.
You aren't going to get your money back in less than 20 years on a grid-tie in Florida either. And even a big solar pv with backup batteries and inverter won't run a whole house ac. A coworker did her home 5.5kw and she still has to run a Honda gas generator to run the ac when the power is out. Otherwise she can go 3 days with no sun or grid. That system cost $55k before the $20k rebate.
If you get steady wind, a wind turbine would be a nice addition to solar. Especially since the wind blows at night
