The first question to ask yourself is are you capable of doing this work or should you get an electrician to do it? However it should be within the capabilities of most DIYers. Depending on where you live, there may be regulations controlling the wiring of solar panels.

 

Question number two - do you need to wire the panels in series or parallel?
If your panels are 24 volt and your controller and batteries are 24 volt, then you would need to wire your panels in parallel- you would be connection all the positive connections together and separately connect all the negatives together.

 

 

 

 

 

 

 

You can connect pairs of panels in series (sometimes referred to as a string), connecting the positive terminal of one panel to the negative of the next, to increase the voltage.
The effects of Partial Shading on overall efficiency should be taken into account when considering series wiring.

 

 

 

 

 

 

 

 

 

As you don't know how your system may develop in the future, it would be a good idea to buy your panels in even numbers, making it convenient to wire pairs in series if you want to change, say, from a 24 volt to a 48 volt system.

 

Note:

Panels in Series:Voltage increase.

Panels in Parallel:Current increase.

 

Ref:http://www.solar-facts.com/panels/panel-wiring.php