power inverter install questions

thanks for everyones info. ive read all your advice. also downloaded some product manuals of different inverters to read the install instructions. this will be an easy project, i just needed to understand what to do and what parts i needed. bought this:

http://www.theinverterstore.com/1200-watt-pure-sine-inverter.html

Also bought some 2awg cable and a 150 w 12v circuit breaker. ill post in here again if i run into trouble putting it in. thanks again.