Is mostly done by a company fed directly into your electrical system and can be very costly from $ 20, 000 to $30, 000 charged by a company.
Great if you have the money.
But if the power goes out so are you also without power.
Requires you to have: Batteries, a Battery Container (to house your Batteries), Cables, Cable connectors, Charge controllers
(to regulate the incoming of electricity)
Inverters (to change the incoming DC to AC electricity),
Or a prewired system you can get @ http://www.solarpenny.com/
The system could be a 12volt 0r a 24 volt depending on your need.
If you would like to start a off grid system the best thing would be to start with a whole setup of a 12 volt system available @ http://www.solarpenny.com/
There are many different sizing of Systems depending on your pocket book. Or you could purchase everything separate which is really not cheaper.
If you start with a smaller system you can always add and build up as money allows.
Amzon.com has a lot of solar stuff available also.
On the bottom of this page you will find several links to solar videos and stores selling everything Solar.
A Watts to Amp calculator, always helpful when learning
There are 89 Video's listed top left-scroll through them all
to select your required information or play all