[amlebede]

I am currently running two subwoofers, 250 watts each and battery seems to be fine with it (no dimming lights + no capacitor). However, what is the max you can push on a E90 battery without any issues?

[kaigoss69]

Unless you are running your system with the engine off, the battery is not the primary source of power, it is the alternator. From what I have seen, 1000W seems to be no problem at all for the electrical system.

[amlebede]

Originally Posted by kaigoss69

Unless you are running your system with the engine off, the battery is not the primary source of power, it is the alternator. From what I have seen, 1000W seems to be no problem at all for the electrical system.

Do you mean 1000 watts extra or 1000 watts overall? The Logic 7 system alone uses up upto 400 watts. Then xenons also eat up power, etc..

And Battery is the source of power for all electronics. Alternator just charges battery up.

[kaigoss69]

Originally Posted by amlebede

And Battery is the source of power for all electronics. Alternator just charges battery up.

Since you seem to be the expert, you can then answer your own question.

But just in case you are willing to do some research on your own, for a change, here you go, knock youself out:
http://www.adventures-limited.com/Ar...yTheoryWeb.pdf

[amlebede]

Originally Posted by kaigoss69

Since you seem to be the expert, you can then answer your own question.

But just in case you are willing to do some research on your own, for a change, here you go, knock youself out:
http://www.adventures-limited.com/Ar...yTheoryWeb.pdf

How does this answer the question about the BMW OEM alternator and battery power capabilities?

[mathematics]

he's trying to show you that you made a statement about batteries and alternators that is incorrect.

while the car is running, the power to all accessories is supplied by the alternator, not the battery.

[amlebede]

Originally Posted by mathematics

he's trying to show you that you made a statement about batteries and alternators that is incorrect.

while the car is running, the power to all accessories is supplied by the alternator, not the battery.

If the alternator is running, that doesn't mean you aren't getting any energy from the battery. The alternator charges the battery but also provides electricity for all equipment. The equipment is also hooked up to the battery from which it feeds. Better?

[amlebede]

Audio shops do in fact add extra batteries to power equipment.

[VP Electricity]

Ambelede, I'm glad to see that you piss off people other than myself. I was starting to wonder if it was just me.

Google "Zen parable full tea cup", and then re-consider your commitment to acting like a know-it-all but being ignorant at the same time. Ignorance is fine, but being an ignorant know-it-all is just irritating.

[amlebede]

Originally Posted by VP Electricity

Ambelede, I'm glad to see that you piss off people other than myself. I was starting to wonder if it was just me.

Google "Zen parable full tea cup", and then re-consider your commitment to acting like a know-it-all but being ignorant at the same time. Ignorance is fine, but being an ignorant know-it-all is just irritating.

Answer this question for me.
Why do audio shops put extra batteries in cars if they don't matter?

[mathematics]

for competitions, the engine has to be off-hence the need for extra batteries.

[klipseracer]

Originally Posted by amlebede

Answer this question for me.
Why do audio shops put extra batteries in cars if they don't matter?

Your knowledge is based off pictures you've seen?

[jigga]

Originally Posted by VP Electricity

Ambelede, I'm glad to see that you piss off people other than myself. I was starting to wonder if it was just me.

Google "Zen parable full tea cup", and then re-consider your commitment to acting like a know-it-all but being ignorant at the same time. Ignorance is fine, but being an ignorant know-it-all is just irritating.

Originally Posted by mathematics

for competitions, the engine has to be off-hence the need for extra batteries.

ownage in full effect

[mathematics]

Originally Posted by jigga

ownage in full effect

i need to push my subzz with mad wattz yo and add a 100 farad CAPACITATOR lol...bc thats what they do on pimp my ride. so riddle me dat haha

[Groverkb]

Looks like the alternator in your car is rated for 120 amps, that's roughly 1700 watts of power. As long as you are not pulling more then that, with everything in the car running, for a continuous time, you should be fine.

If your car needs more then 1700 watts, it will pull some from the battery, then when the load drops off, the alternator will recharge the battery.

Your subs do not pull 500 watts continuously, if there is no bass playing, there is no power consumed. If the volume is low, it's not taking 500 watts when the notes do hit. As long as the average load from your entire electrical system over a given period of time doesn't exceed 1700 watts your battery should be fine.

I'm not sure what the average electrical load on from the car is, but you could always get an ammeter and measure the output from the alternator with different accessories on and get an idea.

[Tegs4tugs]

I agree that the e90 electricals is pretty solid but it Never hurts to get a capacitor, remember when an amp needs that sudden rush of power for bass thats where the cap comes into play as batteries and alternator was not built to provide all that power in a sudden thump of bass.

[amlebede]

Originally Posted by Tegs4tugs

I agree that the e90 electricals is pretty solid but it Never hurts to get a capacitor, remember when an amp needs that sudden rush of power for bass thats where the cap comes into play as batteries and alternator was not built to provide all that power in a sudden thump of bass.

It doesn't appear that a capacitor is even needed in my scenario. Let's say it suddenly pushes 500 watts max. The rest of the system will consume at most 500 watt too and the rest of the equipment likely doesn't consume more than 700 watts.

[kaigoss69]

Originally Posted by mathematics

i need to push my subzz with mad wattz yo and add a 100 farad CAPACITATOR lol...bc thats what they do on pimp my ride. so riddle me dat haha

Like in dis?

[mathematics]

that's so horrible lol

[kaigoss69]

Originally Posted by amlebede

It doesn't appear that a capacitor is even needed in my scenario. Let's say it suddenly pushes 500 watts max. The rest of the system will consume at most 500 watt too and the rest of the equipment likely doesn't consume more than 700 watts.

Thread closed (and the answer to your question was in your original post when you stated that the lights do not dim when the bass [suddenly] hitz!)

[amlebede]

Originally Posted by kaigoss69

Like in dis?

kaigoss69, quit taking pictures of your car.

[6spdcoupe]

Originally Posted by amlebede

It doesn't appear that a capacitor is even needed in my scenario. Let's say it suddenly pushes 500 watts max. The rest of the system will consume at most 500 watt too and the rest of the equipment likely doesn't consume more than 700 watts.

Unless your rocking the latest Sine wave mix CD you will Never see that power out of your amplifier. Therefore it would be of no concern. It seems as if your answer has been given more than once, yet you still oddly ask the same questions ?