I plan to be running two A/B amps that put out about 1kw each. They have a total fuse rating of 130A each. How big of a bat will i need so as my voltage does not drop below 13.9 volts during a 2min run? I know this may be a big ask for a bat but im willing to look at any options. I am using a cabel fatter than 0awg. I also am wondering what fuse i should run up frount for daily driving and also for spl.

Where is the battery going to be put, under the bonnet? or in the back next to the amps???

when you say a 2 min run??? why for???? is the car going to be running??

If the battery is in the boot is it going to be charged of the car alt, or a mains charger? if the latter, being a seperate battery completely, why not run a turbostart 16v battery

Elaberate a little more.....

The only way to keep battery voltage over 12.5v (if you are running a 12v batt) is with a HUGE mofo alternator, an extra battery will make the problem worse, as the alternator will have another "load" on it...... what keeps it at 14v, say, is the alternator, once it hits 12.5v, then your alt isn't putting out enough power, and there needs to be more!
Aaron

if for daily driving stick to 12v batts

and as big as u can afford never can have to much thats why i got 32 2v cells..... for now

It will be in the boot. Charged from the car and i want to be able to have a bit of time to play with so i said 2 min. What about having 7 2v cells and just hooking an extra cell thats charged by mains for comps? That way i can still keep my 12V load and have my 14V load. Will that work?
[Edit: Below]
How much did the 2v bats cost and where did you get them?

[ December 19, 2002, 22:07: Message edited by: UDL's ]

the 2v batteries r from forklifts and 50cm x 17cm x 5cm so i do't think they r that small . oh and weigh a ton got them thru a connection

stick to 12v for daily driver saves alot of problems. get a big alt and that should help keep yout voltage up around 14v.

ask BAT MAN he has all the answers to your batting