Awhitewookie Posted September 11, 2013 Report Share Posted September 11, 2013 Hey all. When I had my electrical setup of (2) yellowtop optimas, (1) juicebox black cherry, 250amp powermax alt-- I could full tilt and blast a/c no probem. But since I added (2) jolt 150ah batts to the back, If i turn on my a/c and just idle or coast (manual) with no other load on the electrical system, I have seen the voltage drop as low as 12.8. It is not a sudden drop, but it is steady and consistent over about 30 seconds. Ive checked all battery connections Any ideas? MY BUILD 1998 Ford Explorer 2dr sport 1/0 Big 3 1/0 everything Alpine cda-9884 Crescendo CZ components (2) Crescendo bc2000's (2) Jolt 150ah (2) Yellow top optimas (1) Juicebox black cherry addition (1) Mechman 270 avbm miss my bc5500 and (4) 15's You know why people are ass holes online but not in person? Because getting punched in the mouth hurts. Link to comment Share on other sites More sharing options...
SnowDrifter Posted September 11, 2013 Report Share Posted September 11, 2013 Issue is probably that powermax alt. Does the voltage go up if you rev the car to ~1500-2000 rpm? ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
Awhitewookie Posted September 11, 2013 Author Report Share Posted September 11, 2013 Yea the voltage rises. I had a feeling it was starting to go out when I get this ghostly whine randomly. What I was confused about was why this never happened with the old batt setup MY BUILD 1998 Ford Explorer 2dr sport 1/0 Big 3 1/0 everything Alpine cda-9884 Crescendo CZ components (2) Crescendo bc2000's (2) Jolt 150ah (2) Yellow top optimas (1) Juicebox black cherry addition (1) Mechman 270 avbm miss my bc5500 and (4) 15's You know why people are ass holes online but not in person? Because getting punched in the mouth hurts. Link to comment Share on other sites More sharing options...
Guest Posted September 11, 2013 Report Share Posted September 11, 2013 more batteries = more load on alt. Link to comment Share on other sites More sharing options...
SLAYER1805 Posted September 11, 2013 Report Share Posted September 11, 2013 My Jeep would drop from 13.4 to 12.1 in the summer when I cranked the AC on, this was with only the (new)stock batt and stock alt Link to comment Share on other sites More sharing options...
Awhitewookie Posted September 11, 2013 Author Report Share Posted September 11, 2013 Gotcha. Well time to save for a real alt. Or weld a bracket up and add my stock alt to fake it till I make it MY BUILD 1998 Ford Explorer 2dr sport 1/0 Big 3 1/0 everything Alpine cda-9884 Crescendo CZ components (2) Crescendo bc2000's (2) Jolt 150ah (2) Yellow top optimas (1) Juicebox black cherry addition (1) Mechman 270 avbm miss my bc5500 and (4) 15's You know why people are ass holes online but not in person? Because getting punched in the mouth hurts. Link to comment Share on other sites More sharing options...
SnowDrifter Posted September 11, 2013 Report Share Posted September 11, 2013 Just sounds like a case of not enough idle output. 12.8 isn't that bad of a drop. Just charge your batteries a couple times a week and that should be fine until you get a different alt ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
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