The on the Grid
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.
The Off the Grid
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), Fuses, Solar Pannels
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.
There are 89 Video's listed top left-scroll through them all to select your required information or play all.
Below are several links to Websites selling Solar Panels & more.