The short answer to the OP is no. not in the short term. Depending on a variety of factors, your typical "break even point" (and how big of a system you buy is irrelevant) is about 10-14 YEARS down the road. It is a long term investment, and you will see immediate reductions, but you've also got to PAY for the PV system first.
The things that WILL net a virtually immediate ROI:
CFLs: for fifty bucks you can replace virtually every commonly used bulb in your house, and you will see an immediate drop in electric usage. figure lighting averages 20-25% of electricity cost, and you just cut lighting by 75%...
Attic fans (note the plural): depending on where you live, two to three fans (for a large house) can reduce your cooling costs significantly in summer. cost: about $80 per (and most houses have at least one already)
Ridge venting. Same conservation principle as the fans, only allows continuous passive attic venting through convection currents. Not as effective at temp regulation as fans, but it's cheaper, continuous, and requires ZERO electricity itself.
Extra insulation: Worth it's weight in gold (or money as it were). if you dont have rolls of pink stuff (or whatever your local color is!)
on top of and in between your ceiling joists you are throwing away money especially in summer.
Insulated LOW-E windows: double (or triple) pane windows are good, when you get ones w/ LOW-E they are twice as good... the farther south you live, the more effective LOW-E is.
Programmable thermostat, and setting it properly: Do you really need your house to stay 75 all day long while you are work? Getting a thermostat that's programmed for the days of the week can save you a crap load.
There are of course more things... like for example, is your garage attached to the house? if so, is the garage door insulated?
You could do EVERYTHING on that list and spend less than a PV system. and save more money. I don't know ANYBODY who's installed a PV system that didn't check off every single thing on that list before they even called to get a quote on the PV system.
Don't get me wrong, a grid tied PV system is awesome, especially w/ net metering, but don't delude yourself just because it's so sexy. If you didn't do this stuff first (a lot of which qualifies tax credits like a PV system does) you are pissing away a considerable amount of money...
It would be like if all you needed to do was cut your gas consumption, and you went and bought a brand new prius. Yes, you could brag on the fancy hybrid system, and it's new and shiny... but it still gets the SAME mpg as a 1989 honda crx hf.
So I guess what I'm trying to say is that if you want to go blow 20-30k on a grid tied PV system to wow your neighbors w/ how green you are, go on (Your money will help the economy!)! but if all you want to do is cut your electricity costs (and in the end be greener), the ROI is far far better w/ the other options...at least first
Good luck!