battery wiring questions with schematics

[Lucky 76 5]

I have made two schematics. The second one is revised and I think it should work. I also have a few questions.

1) Which is a better setup?

2)What size fuses would go in each fuse holder? the amps have a 150 and 500 amp fuse rating and the alternator is 260 amp.

[shizzzon 461]

This is what u do-

Front battery--(18" away FUSE with 300A fuse)----------------------Dual 200A solenoids or single 500A solenoid(optional)-------------------------Fuse with 300A(within 18" of rear battery 1)---Rear Battery #1--Rear Battery #2.

From each rear battery, run the power wire from batt to amp. Fuse those lines within 18" of battery.

[Lucky 76 5]

This is what u do-

Front battery--(18" away FUSE with 300A fuse)----------------------Dual 200A solenoids or single 500A solenoid(optional)-------------------------Fuse with 300A(within 18" of rear battery 1)---Rear Battery #1--Rear Battery #2.

From each rear battery, run the power wire from batt to amp. Fuse those lines within 18" of battery.

so each amp will have its own source (rear bat 1 for 1 amp and rear bat 2 for another amp) correct?

even though my amps have a fuse rating of a total of 650 amps the batts should be fine with a 300 amp fuse rating? i understand the 300 because of the alt but how does this work if it is possible that my amps could draw over 300 amps of current?

[shizzzon 461]

u fuse as rated for your amps!

So fuse protect for amp #1, use 150A ANL fuse.

Fuse protect for amp #2, use 500A ANL fuse.

Your rockford amp requests a 500A fuse?

That sounds too high for a 4000w amp...

IF that's true, then the amp should have dual 1/0 inputs... otherwise, i don't trust it's design.

[Lucky 76 5]

u fuse as rated for your amps!

i understand

So fuse protect for amp #1, use 150A ANL fuse.

Fuse protect for amp #2, use 500A ANL fuse.

i meant from bat to alt ... why is it different?

Your rockford amp requests a 500A fuse?

yes

That sounds too high for a 4000w amp...

it is a class bd that is why ... very inefficient

IF that's true, then the amp should have dual 1/0 inputs... otherwise, i don't trust it's design.

i dont either lol

[shizzzon 461]

u use 300A fusing between front and rear batts due to charging current.roughly 100% of all discharge capacity will come from rear batts so current through the main line should only be from the alternator

[Lucky 76 5]

u use 300A fusing between front and rear batts due to charging current.roughly 100% of all discharge capacity will come from rear batts so current through the main line should only be from the alternator

alright well that makes sense ... is the way i have the second schematic layed out fine?

[Lucky 76 5]

u use 300A fusing between front and rear batts due to charging current.roughly 100% of all discharge capacity will come from rear batts so current through the main line should only be from the alternator

alright well that makes sense ... *does the way i have the second schematic layed out look ok?

or do i need a jumper in between both rear batteries for the amps to use the power of both batteries?

note: i will not be using an isolator

[shizzzon 461]

i dont blame ya not using an isolator but a solenoid is a wise idea though...you just wire ur rear batts in parallel.no fuse goes between the batts, just before the bank and before each amp.

[Lucky 76 5]

i dont blame ya not using an isolator but a solenoid is a wise idea though...you just wire ur rear batts in parallel.no fuse goes between the batts, just before the bank and before each amp.

so are you saying something like this? the orange circle being the solenoid? what is the difference between a solenoid and isolator i thought a solenoid was a form of an isolator?

[slim2fattycake 85]

http://www.oznium.com/relay200http://www.oznium.com/relay200

You can use this relay as an isolator.

http://www.oznium.com/images/wiring_diagrams/battery_isolator_diagram.jpg

Remember to have a good ground on the relay or it won't click on.

[Lucky 76 5]

http://www.oznium.com/relay200http://www.oznium.com/relay200

You can use this relay as an isolator.

http://www.oznium.com/images/wiring_diagrams/battery_isolator_diagram.jpg

Remember to have a good ground on the relay or it won't click on.

i couldnt get the link you sent me for the relay ... wouldnt i need something more than a 500 as my amps have a potential draw of 650 amps?

[shizzzon 461]

no, the solenoid is rated for your charging current running through that line...

Hence, u need either dual 200s or a single 500A. dual 200s are WAY cheaper though.

Your diagram is still way off, quit using that diagram.

Let me make one.

[shizzzon 461]

here u go-

[jcarter1885 995]

just curious to why so many ground wires or is that just the symbol your using to establish thats a ground connection

[shizzzon 461]

i always suggest running as many grounds as possible! the more the better, trust me!

I have 14.8v sitting in the rear of my car and multi runs of 2/0 ground wire.

[jcarter1885 995]

i always suggest running as many grounds as possible! the more the better, trust me!

I have 14.8v sitting in the rear of my car and multi runs of 2/0 ground wire.

what ratio do you use if any (for instance I only have two positive wires leaving both of my batteries)? Should I go for 3 or more 1/0 awg wires from both baterries and did you use the same ground spot (that would be a lot of grounds for one spot) or different one because my primary battery is grounded to cars frame, the rear battery is ground to the primary battery since their both in the trunk of my car.

where did you run your power and ground wire to for the solenoids?

[slim2fattycake 85]

http://www.oznium.com/relay200/tech

That diagram should let you know where to run the power and ground off the relay

Use grounds that are less than 3ft.

ps- sean, your diagram are ugly lol.

Edited July 16, 2009 by phi

[jcarter1885 995]

http://www.oznium.com/relay200/tech

That diagram should let you know where to run the power and ground off the relay

Use grounds that are less than 3ft.

ps- sean, your diagram are ugly lol.

yeah i know all that, i mean what exactly is the wired(power and ground) leaving the relay hooked up to?

none of those responses answered my questions, but appreciate the input

Edited July 16, 2009 by jay-cee

[Lucky 76 5]

alright i think i get it ... i will make a revised copy of ur print to see if what i see is what you intended on ... where can i buy two of those 200 amp solenoids?

[slim2fattycake 85]

did you not look at the diagram?

[shizzzon 461]

www.oznium.com

Like i've told someone before, be VERY careful going to that site.

Many others have been abducted by the array of product they sell and u may become addicted worse than anything possible...

Keep your eyes open at your own risk..

I dont care if my diagrams are ugly... ugly's what gets u those high SPL numbers...

The Solenoid(relay) is hooked up FROM your starting battery's in line fuse and TO a fuse(within 18" of rear battery bank) that will protect the rear battery bank.

It's on the diagram... Maybe i'm just used to wiring things but it's right there.

[jcarter1885 995]

I was talking about the 12+VOLT WIRE, what did you wire yours too. I can tell that the power wire is going from battery one to battery two. Did you ground the wire to a different location thats close to the solenoid.

[slim2fattycake 85]

the 12volt line goes to your ignition wire either on the head unit harness or somewhere else so when you turn your car, it will turn on. Its says it in the diagram I linked.

Edited July 16, 2009 by phi

[shizzzon 461]

Oh, now i gotcha-

The "ignition wire" is exactly what it is... ignition wire.

Splice this wire into the same 12v ignition wire that is in your radio's wire harness.

I don't know if it's a bad idea but i never suggest grounding solenoids to the rear battery bank's terminal.

I always suggest grounding the solenoids directly to car.

Oh... and now look what u guys have done...

U got all kinds of people readin this..

Oznium might be gettin all kinds of Relay orders...