What size battery for Two AB XFL 15's.

[TrillGates2k6]

One thing you don't want to skimp on is batteries; It would be worth it to pay a little extra and get some quality batteries, trust me. If you're running that kind of power, you'll likely need 2 batteries for a total of 3 if you include the one that's already under the hood. 100AH is good, but 128-AH is better; Especially when the batteries are AGM

 

[brian84corvette 10+ year member]

search out deka intimidator 9a31

that seems to be the best bang for the buck batterys out there.

also sams club sells agm duracell batterys in size group 31 but be cautious of the top posts. some of them are weird

 

[TrillGates2k6]

Why would someone pay upwards of $239.00 for a DEKA INTIMIDATOR 9A31 that is only rated at 100 AMP HOURS when they can get a Kinetik KHC-2400 which is 128 AMP HOURS for roughly the same amount of money, possibly even a little less money?

Kinetik HC2400

 

[NASTY08IMPALA 5,000+ posts]

Why would someone pay upwards of $239.00 for a DEKA INTIMIDATOR 9A31 that is only rated at 100 AMP HOURS when they can get a Kinetik KHC-2400 which is 128 AMP HOURS for roughly the same amount of money, possibly even a little less money?
Kinetik HC2400

Why would someone buy a 2400 when u can get a duracell for 170

 

[vibe]

55ah of battery per 1000 watts PERIOD and if you dont have enough alternator juice to keep up with your amp power your going to need more batteries. what size alt do you have?

 

[TrillGates2k6]

Why would someone buy a 2400 when u can get a duracell for 170

Which Duracell battery are you talking about? You didn't post a model number, a link or anything; How many Amp hours is this battery?

 

[NASTY08IMPALA 5,000+ posts]

Which Duracell battery are you talking about? You didn't post a model number, a link or anything; How many Amp hours is this battery?

G31 100ah 2 of them would be plenty for this setup

 

[TrillGates2k6]

Yeah, and the battery you're talking about, I've only seen it listed on Sam's Club for $179.00; And once you factor in the fact that most people aren't members and would have to buy a membership first, you still come out paying about the same amount of money; And this battery still gets trumped by the KHC2400 which is 128 AH because this one is only 110 AH; But what nobody even knows is what kind of alternator this dude has. He never said if he's running a stock or H/O Alternator; So were all kind of shooting in the dark; But if this dude has a stock alternator, he's gonna likely need to supply power for around 440 AMPS, which would take roughly 4 batteries, regardless of which brand he wants to go with;

 

[NASTY08IMPALA 5,000+ posts]

Yeah, and the battery you're talking about, I've only seen it listed on Sam's Club for $179.00; And once you factor in the fact that most people aren't members and would have to buy a membership first, you still come out paying about the same amount of money; And this battery still gets trumped by the KHC2400 which is 128 AH because this one is only 110 AH; But what nobody even knows is what kind of alternator this dude has. He never said if he's running a stock or H/O Alternator; So were all kind of shooting in the dark; But if this dude has a stock alternator, he's gonna likely need to supply power for around 440 AMPS, which would take roughly 4 batteries, regardless of which brand he wants to go with;

Its 170 here and u can download one day free passes ..the 2400 is 235 but how much is shipping ? Its not a bad price but if ur gona pay 60 bux to ship it ur gettin the shaft..duracell and deka is all i run..best for the money

 

[TrillGates2k6]

Its 170 here and u can download one day free passes ..the 2400 is 235 but how much is shipping ? Its not a bad price but if ur gona pay 60 bux to ship it ur gettin the shaft..duracell and deka is all i run..best for the money

It's FREE SHIPPING; Can't beat it man

Kinetik HC2400

 

[Pyrofan]

Its a 150 amp Alt. The reason he wants a cheap battery is cause hes run out of money. We got a ton of problems like the Pac unit not being right and stuff. I have a sams club membership.

 

[TrillGates2k6]

Its a 150 amp Alt. The reason he wants a cheap battery is cause hes run out of money. We got a ton of problems like the Pac unit not being right and stuff. I have a sams club membership.

Let's see here, 150 AMP Alternator minus 45 AMPS for the vehicle leaves him with about 95 AMPS which is only good for about 1,368 Watts "IF" he can keep his voltage level at 14.4 volts, which he will not be able to because he's trying to push 4,000 watts; 4,000 Watts of power is roughly around 307 AMPS give or take; So 307 AMPS - 95 AMPS = 212 AMPS he has to make up for just in batteries alone; He would need about (2) 120 AH batteries to compensate for that which would put him at 240 AH running them in parallel. So unless he buy's (2) batteries, the system is gonna experience serious voltage drops and it's gonna kill his battery pretty quick

 

[Pyrofan]

Let's see here, 150 AMP Alternator minus 45 AMPS for the vehicle leaves him with about 95 AMPS which is only good for about 1,368 Watts "IF" he can keep his voltage level at 14.4 volts, which he will not be able to because he's trying to push 4,000 watts; 4,000 Watts of power is roughly around 307 AMPS give or take; So 307 AMPS - 95 AMPS = 212 AMPS he has to make up for just in batteries alone; He would need about (2) 120 AH batteries to compensate for that which would put him at 240 AH running them in parallel. So unless he buy's (2) batteries, the system is gonna experience serious voltage drops and it's gonna kill his battery pretty quick

What about 2500 to 3k each?

 

[TrillGates2k6]

Here's a great video you might want to watch; It explains in great detail about amp efficiency and amperage; You can plug in your own numbers and try to find out what he will need. I'm also gonna be running about 4,000 watts RMS, and I too have to buy 2 batteries.

 

[TrillGates2k6]

that math i did up top was a rough estimate; But in order to figure out how much wattage it takes going in to have a specified amount of wattage coming out, you have to figure in about 70% Efficiency; So for example, If I want to produce 4,000 Watts; 4,000 / 70% = 5,714 watts; And I could divide this by 14.4 which would give me a best case scenario, but instead I'll divide it by 13 volts which is a more realistic scenario; So 5,714 watts / 13 = 439 AMPS; This is a more accurate perception of the numbers; In my setup, I have a 240 AMP alternator; So I subtract 45 AMPS for the engine and accessories which leaves me with 195 AMPS; So 439 - 195 = 244 AMPS that I have to make up for just in batteries alone; So If I get (2) 120 AH batteries that puts me pretty close at 240 AH; So really I'm only lacking 4 AMP HOURS when it's all said and done. And because of the way I did the math, I divided by 13 volts instead of 14.4, so I left myself a little breathing room