how any watts would a 250 amp alt and 3 optima yellows handle daily?!!!

[babaganoush123 10+ year member]

so im straight ?

 

[skadude016 5,000+ posts]

lol witch ones are better because i can get them for $120 each? 31s-34s

you can get 31's and 34's both for 120? there should be no question then about gettin the 31's

 

[babaganoush123 10+ year member]

lol yea i dont know alot about batts? how many 31s can my alt handle daily with no problems its a 250 amp alt?

 

[IgnoreMe 5,000+ posts]

lol yea i dont know alot about batts? how many 31s can my alt handle daily with no problems its a 250 amp alt?

as many as you can fit.

2 batteries = X amount of current being pulled, and voltage dropping to 12.9V (just an example)

4 batteries = half the amount X current being pulled from each battery, and voltage dropping to 13.5V (again just a random number i pulled out of my ***)

adding batteries wont harm your alternator. it will just disperse the load over more batteries therefore keeping voltage up. think about it this way. would want to pull each batter down to 30%? or would you want to instead pull double the amount of batteries down 15%? same amount of charging is left for the alternator to do, but less stress is exerted on the batteries during this time.

plus the more you wire up in parallel, the less ESR you get, which is a good thing.

 

[babaganoush123 10+ year member]

i always thought the more batts the more stress im putting on the alt? how long dose it take to do the big 3?

 

[IgnoreMe 5,000+ posts]

i always thought the more batts the more stress im putting on the alt? how long dose it take to do the big 3?

wired in parallel, the current is split between the two batteries, esr drops, and voltage stays the same.

voltage is directly related to how much is being drawn from the battery. IE, when you draw 200A the voltage drops to say, 13.8. now draw 400A and voltage drops to 12.8. imagine the voltage as a percentage of what is left in the battery. the more you draw, the less is left. wiring batteries in parallel creates the sum of the two batteries amperage rating. for example 2 12v 800cca batteries wired in parallel give 12v and 1600cca with lower esr (essentially, its just a bigger battery split into two parts). although this isnt important for this thread, series would give you 24v 800cca, and the sum of the two batteries esr ratings.

you are going to be pulling the same amount of power regardless whether you have 1 or 4 batteries, so your batteries will still need to be charged up the same way. the only difference is now you are putting the load on a much bigger battery (the ones wired in parallel that act as a huge battery), and of course, there is a bigger "percentage" left over (ie, keeping the voltage up)

 

[babaganoush123 10+ year member]

so how many watts am i good around with no problems? umm what if i just use a regular batt for the hood any changes?

 

[Lakota 5,000+ posts]

so how many watts am i good around with no problems? umm what if i just use a regular batt for the hood any changes?

Sometimes you just have to install the stuff and fine out. We can't give you an exact answer other than it will help.

 

[babaganoush123 10+ year member]

**** you got me lol

 

[bball09124 10+ year member]

well in my truck i run 2500 watts daily on a 140 amp alt, stock battery up front, kinetik 2000 in back and it handles it no problem. i think 3,000-4,000 would be the max your setup could handle.

 

[IgnoreMe 5,000+ posts]

its as simple as using that 250A alt and adding those batteries. use a dmm and some songs that have long drawn out basslines that you notice are giving you voltage drops, and measure.

if you are sticking above 13V, you should be ok. if not, keep upgrading until you get there. IMO, 13V is a pretty safe area to float around.

 

[babaganoush123 10+ year member]

if i throw in another batt would i be able to handle more?

 

[IgnoreMe 5,000+ posts]

if i throw in another batt would i be able to handle more?

you're honestly making this a lot harder than it has to be. if adding batteries wouldnt help handle more power....why would we be talking about them for 2 pages?

 

[babaganoush123 10+ year member]

forgot to say that my crown vic comes with a stock 140 amp alt its a interceptor.