21 replies to this topic

[insamoufonyx]

anyone know how to do a dual battery setup?

[freaker]

get a b line from your alternator, is best so you don't drain your first battery....

or do it as in a motorhome...


freaker

Edited by freaker, 07 July 2008 - 01:04 PM.

[Mark@IR]

anyone know how to do a dual battery setup?

Planning a big install are we?

Basically going to need a deep cycle battery, 0 guage cables, relay, and 2 volt metres is a good idea, so you know what both batteries are at.

Forgot to add, your going to need fuses and the such.

Post up whats your planned install.. we'll go from there.

Edited by m-range, 07 July 2008 - 12:48 PM.

[Rob Himself]

Split charge system... will write more later

[insamoufonyx]

cheers guys, already got the system in and a 306 desiel battery is only jsut keeping it all alive, jsut want a second battery to give it the rest of the umpf it needs, running two JBL amps twin 12" jbl subs, vibe 6x9's alpine R type components sony dash speakers, DVD headunit, power cap ( because it looks cool i know it does jack all blah blah blah) and getting one or two more screens next monthh and probalby a more powerfull amp for both the subs as i recon i can get alot more out of it.

[Mark@IR]

anyone know how to do a dual battery setup?

Planning a big install are we?

Basically going to need a deep cycle battery, 0 guage cables, relay, and 2 volt metres is a good idea, so you know what both batteries are at.

Forgot to add, your going to need fuses and the such.

Post up whats your planned install.. we'll go from there.

Split charge system... will write more later

What i said, and what Rob said.. Same thing basically, split charge buddy.. i've outlined what it needs, Rob's just put the name to it

[insamoufonyx]

ok cheers, any more detail? im fairly clued up on wiring as i jsut finished making a new full loom and i have a fair bit of knowhow on audio just dont really know where to start with this!

cheers

[Mark@IR]

ok cheers, any more detail? im fairly clued up on wiring as i jsut finished making a new full loom and i have a fair bit of knowhow on audio just dont really know where to start with this!

cheers

Quite simple how it all works, just needs a bit of work getting cables routed right and the such..

Basically, split charge system is what it says on the tin, as the charge comes in, the relay splits it 50/50 across the two batteries. Its important to keep your engine running gear on one battery, and audio the other.

I really wouldn't run that power cap with the split charge system though, otherwise your adding more gear for not alot of point, the cap wil be a hinderence. If your a massive fan of the power cap and defo want to keep it, then upgrade your cap to a 40-50 farad hybrid cap..

[insamoufonyx]

will probs bin the cap then, depends if my battery can put out enough umpf on its own really

[Bungle]

i have just fitted a split charge system to dolly the camper van so if you need help PM me

i fitted voltage sensing relay as its simpler and always gives priority to the engine battery



run a wire from your engine battery to the relay fused as close as you can to the battery

then the same for your deep cycle leisure battery

then the relay will want a earth

next run a wire from your leisure battery (fused again near the battery) to a second fuse box for you ICE, then off to the head unit amps etc

the idea is the leisure circuit is separate to your engine battery unless there is more than 12 volts at the relay

the only way you will get more than 12 volts is for the engine to be running and the engine battery topped up



my fuse box each circuit fused and switched



i have 2 leisure battery's as its a camper

[insamoufonyx]

thanks bungle really helpful, how much is a deep cycle battery going to set me back as i alread have a spare i was planing on using for my normal stuff and then my more powerfull one for my ICE,

also if i use a voltage sensing relay isnt that going to cause the problem of my second battery not beign charged as often - which is the oposite of what i need, reason im doing the conversion is so that the second battery is always toped up so i dont get the amp surging problems i had before due to battery not being charged enough

cheers

[Mark@IR]

will probs bin the cap then, depends if my battery can put out enough umpf on its own really

This is why i suggested an audio specific deep cycle battery. You'll REALLY have to put some serious power through to drain these buggers! From what you've said, i really don't think your knocking out enough watt's to have the problem.

The battery will do 100 times better job then the cap for keeping power to your amps. The only reason you'd want to run a cap if your running a second battery would be to the front speaker amp, just so the bass amp doesn't drop volts to the speaker amp.

Go on a few different sites, something like the yellow top battery should see you fine.

Also, if you haven't already, change all cables to 0 guage cables, including wires from your alternator. If its not free flowing you're not going to get the best out of it.

[Bungle]

thanks bungle really helpful, how much is a deep cycle battery going to set me back as i alread have a spare i was planing on using for my normal stuff and then my more powerfull one for my ICE,

also if i use a voltage sensing relay isnt that going to cause the problem of my second battery not beign charged as often - which is the oposite of what i need, reason im doing the conversion is so that the second battery is always toped up so i dont get the amp surging problems i had before due to battery not being charged enough

cheers

now what i'm using my set up for is a little different to you but

yes using a voltage sensing relay won't charge as often as a relay but do you want your car to start or the radio work ?

its not really as much as a problem as it sounds i have 170 amp/hours of battery and a 50amp alternator

you will be using a battery about 1/2 mine with a alternator a little bigger than mine, it will charge ok

i think one of my 85 amp/hour battery's were about £50 but that was over a year ago and things keep going up these days

[insamoufonyx]

ive got a 90amphour battery and a 50amp battery and a 70amp alternater, is there a way of having both charging at the same time as with it being a show car i cant afford to not have enough power for the amps but then like you say i need to be able to start it!

[v8mini]

here another link for duel battery set up.

i was think of doing this for a spare battery to charge my RC airplanes without draining the car battery. opted for a solar charging panel instead as its not being used all the time and doesn't need that much recharging

http://www.marclelei...litCharge01.htm

Edited by v8mini, 09 July 2008 - 12:10 AM.