We simply at this stage have a system that is connected to the Grid. its a 3.0Kw system comprising of 16 panels. the surplus power generated through out the day is sold back through the Grid to the Electric company.This way we are credited for each Kw.
When we build again we want to have a similar system but not connected to the Grid. This is called a "stand alone system" where as the power generated is charging up your battery bank that your house will run off.