Slawsen Posted October 25, 2010 Report Share Posted October 25, 2010 I always thought mixing batteries was a bad idea? Apparently mixing agm and wet cells is bad. Which is why you just replace the wet cell up front with an agm battery before you just "add one to the back". Quote 00' Nissan Xterra Always under construction :] HU: Pioneer DEH3100-UB Mids & Highs: Kicker DS Component Set & Crescendo tweeters Mids & Highs Amp: Rockford 150.2 Subwoofer: 2 DC Audio LV 4 18"s Subwoofer Amp: Hifonics Brutus 2005d you been hanging out with jeff and dustin with that green paint? its yellow so it has to be loud. Link to comment Share on other sites More sharing options...
merk_master Posted October 25, 2010 Author Report Share Posted October 25, 2010 Oh I always thought you wanted matched CCA for batteries Quote hopeful noob Link to comment Share on other sites More sharing options...
sayhuh? Posted October 25, 2010 Report Share Posted October 25, 2010 One way to figure this out is look at your fuses on your amps. add that up and see what it comes out too, then think about how much your heat, a/c, lights, etc use and add that to what your amps draw. Think your alt can keep it all charged? Quote Blown Link to comment Share on other sites More sharing options...
merk_master Posted October 25, 2010 Author Report Share Posted October 25, 2010 (edited) I figure my 75% of my alt is used from factory. Then i used the formula 1900/.7/14.4=(x)/.5 = amps needed, Then subtract Alternator amps. gives me needed draw. Would it be basically the same to do one large battery instead of 2? like a Hc2400? Edited October 25, 2010 by merk_master Quote hopeful noob Link to comment Share on other sites More sharing options...
sayhuh? Posted October 25, 2010 Report Share Posted October 25, 2010 One hc2000 is enough if want to go batts only. Quote Blown Link to comment Share on other sites More sharing options...
dugee81 Posted October 26, 2010 Report Share Posted October 26, 2010 Additional batteries pose more of a load on the alt, give or take ~10 amps. I had a HC1400 under the hood and 2 hc800's in the rear, some songs would drop me down to the mid 12's. Got rid of my 1400 and now jus have an 800 under the hood and 800 in the back, and I stay around 13.8 on all songs. lowest I've seen was 13.1 for a split second Quote 200a alt. by Excessive Amperage hc800 under hood & 2 Deka 9a31 in rear 1/0awg + big 3 SAZ 3000D HDC3 18" @ 2 ohm Link to comment Share on other sites More sharing options...
MECHMAN Posted October 26, 2010 Report Share Posted October 26, 2010 XS power D3100 in the trunk. DONE. Quote 1-888-MECHMAN www.Mechman.com [email protected] Link to comment Share on other sites More sharing options...
Boon Posted October 26, 2010 Report Share Posted October 26, 2010 Stock electrical, unless you wanna bang on it for ages with the engine off. You're talking about a realistic load of maybe 60A. Quote 10.x volts fo' life! Link to comment Share on other sites More sharing options...
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