I'm bout to run my first setup over 1300wrms. Gonna be running about 4400 rms total in my jimmy. I can only fit ONE battery in my cargo area due to my box. I already have a stinger SPV70 and I'm gonna buy another one to replace my starting battery with. So with upgraded starting batt and extra batt inside the car what size alt should I get to to run this much power daily? And I'm looking at DC power alts right now. Are they good?