Connecting a battery to a power point

[korn3172]

Hi,
I just installed a new sound system and soon to upgrade to a 100amp alternator and have a 1.5f capacitor installed.

When i go on holidays i want to hook my car battery up to the power so that i can set my laptop sound to the car.

I was wondering how to connect the battery to the power so i dont need to leave the car running.

System will include 3 amps, 2 600 RMS subs, 2 x 6*9 and 2x Splits.

What do you recommend?

 

[stocky]

why not just get a battery charger?

 

[LightningVP]

You could always take a battery charger and have that hooked up...only way you would really be able to do it without draining your battery

 

[garfa]

um.... unless the stereo draws more than the charger can supply.....

 

[korn3172]

oh kk so all i need is a big arse charger
lol
and as long as i dont max it should be alright.

 

[Tasmaniak]

right...should only set you back 500-700 bucks

 

[holdenboy]

lol....

How much power do the amps make (rms) ?

Could always get one of these;

Jaycar Electronics

Puts out 13.8v at around 40A.

I think you'll have to disconnect the amps' power cables from the battery and connect it to the PSU above, and connect a 8awg earth cable to the negative terminal. Not too sure about that tho.
Saw a few of the cars at Autosalon using these babies to power their systems while on show.

 

[Tasmaniak]

chances are that one won't be enough. especially with 3 amps.

 

[korn3172]

Yeah,
2 amps at 600 RMS (mono sub ones)
1 amp at 600 or so rms

 

[holdenboy]

Do you wanna run the system at full volume?

I would suggest buying one of the PSU and slowly turn the system up, that unit has an amperage display so you should be able to turn it up maybe just under half volume and the amps shouldnt pull more than 40A...it'll mainly pull alot of current on bass notes.
Buy one, see how far you can turn it up before the system starts pulling 35 or so amps, and if that volume isnt enough then you'll need two.