Run those numbers through my calculator and see how close it is. There are several companies on the web that do complete systems and I used their figures averaged to build my calculator. When I ran my house through it one time, it said my electric bill would be about $10 for that month, and the calculator calculated it at around $125 so it is pretty close.
Once you get to the calculator, go on to the bottom of the first page and click the Study It button, then scroll to the bottom of the second page and click the first Calculate It button.
At the top of that page, enter the total watt hours per day. Not kilowatt hours! This is actual watt hours.
The calculator will calculate the number of batteries required, but keep in mind, it is set up so that you never pull the battery bank below 80% (80% full, not 80% used) so as to keep them healthy for a long time. I adjusted it one time to do 50%, but that is a pretty deep discharge. I set it back to 80% and that will cover the few extreme situations that happen. For example, if you have your bank sized for a 2-no-sun-day size and you get 3 no-sun days once in a while. You're still ok, long as it don't happen a whole lot.
It also calculates the number of solar panels it would require to keep thos batteries charged and supply all the power needed.
Charging losses, inverter losses, temparature correction losses and etc. are all calculated in.
To try out the calculator, go to:
http://dsjscrd.gotdns.com/calc
Enjoy!
Doug