Here's some sites that may help. Basically solar won't cut it alone, you need to get a hybrid system to get off the grid. Solar and wind combo. You can use solar cells and solar water heating systems to help reduce power plus wind turbines (depending on your area to add power especially at night and on cloudy days). You'll need also a backup 15Kw ($2000) or greater generator for emergency which has the capability of full home power in total all loss scenario. There are government benefits that will discount your equipment but the bad side is the systems will never pay for them selves in your life time. Inverters which convert the DC power from your cells to AC can get expensive to replace down the line as well as battery banks. All in all it's a great feeling getting off the grid but it's can get expensive and may not pay off in your life time. Check out the altenergystore.com site they have some great source for info. Look at your power bill at the end of the month, take the number of kilowatts used, this will give you an idea of how much energy you are using. Then start using energy efficient bulbs, solar water heating systems to begin to bring the energy consumption down. If all depends on how far you want to go, weather its off the grid or just to cut back on your bill.
(Watts=Current X Voltage)
Example: 15000 watts divided by 110 volt house will give you 136 amps of current. You don't use this much at any one time anyway but it gives you a idea of how much current a non energy efficient big house with AC,water heater and stoves on.
Beginner's Guide to Solar, solar water and Wind Energy (great source of info)
http://howto.altenergystore.com/Getting-...lectricity/a19/Roof shingles (solar)
http://www.oksolar.com/roof/http://www.solarhome.org/solarhomekits.htmlhttp://www.solarworld-ca.com/Products.156.0.htmlhttp://www.powerfilmsolar.com/products/building_integrated/membrane-roofing.htmlhttp://store.sundancesolar.com/solarforrvs.htmlSolar roof Shingles
Solar and Solar Water
4kW to 1600kW floating wind Generator
http://www.oksolar.com/n_cart/search.asp?cat=Wind%20Generators&subcat=Wind%20Generators
Solar trees as well
http://www.oksolar.com/esolutions/products/IQ%20Solar%20trees.htm