We went through a solar panel installation a couple years ago
@rustycolts. Sorry I missed this. There's a lot of good info in here, but some of it doesn't apply. In the state of Florida, you get back in credits the same rate you'd be paying. So if it's $1 per Kw, then you'd get a $1 back per Kw. There is no negotiation (unless that's changed in the last 2 years). You're also not allowed to produce back to the grid if there's an outage.
To your specific question rusty, I think that's probably a bit much. I paid a bit more than that for 4000 square foot house and it covers my monthly bill almost completely with the exception of July and August and Sept. It wasn't uncommon (in a two story house with old AC unit) for our bill to be $700 some months. Of course we added new windows, insulation etc as well as replaced the old AC unit, so it's not JUST the panels contributing to that reduction, but our bill is now basically break even each month.