My car electric is stock so far. I will of course be upgrading big three but as far as extra batts, alt, batt up front my car is stock. Would 2 kinetik 2000s in the back be enough to keep it from dipping low. Ive also read they will just add more strain to the alt.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif