Isolator Questions

[Buck 5,000+ posts]

1. How big? 250a? 300a?

2. What brand?

3. Where to buy?

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[loopkiller 10+ year member]

1) Bigger than your alt output

2) Stinger

3) Here

 

[99grandprixGT 5,000+ posts]

im about to order this one

 

[loopkiller 10+ year member]

im about to order this one

That one should work fine. The model that I posted is a little more heavy duty and would probably be my choice. But the eBay one is 1/4 the price.

 

[Buck 5,000+ posts]

1) Bigger than your alt output2) Stinger

3) Here

I'm probably getting a 250a h/o alt eventually though. So idk if a 240a would work.

 

[Buck 5,000+ posts]

Bump

 

[Buck 5,000+ posts]

http://cgi.ebay.com/NEW-Stinger-SGP35-500AMP-Current-Relay-Battery-Isolator_W0QQitemZ120367143652QQihZ002QQcategoryZ14932QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[jdawg 5,000+ posts]

why do you need one?

 

[Buck 5,000+ posts]

why do you need one?

Well I'm thinking about having a battery bank for car audio only and leaving the battery upfront separate.

 

[jdawg 5,000+ posts]

havin a bank for the show or parking lots?

 

[hrtbrk1 5,000+ posts]

Well I'm thinking about having a battery bank for car audio only and leaving the battery upfront separate.

so how will u charge ure bank of batteries?

 

[Buck 5,000+ posts]

so how will u charge ure bank of batteries?

Well the way the isolator was explained to me was that the alt charges both sets of batteries but they are not directly connected. The alt I believe still charges the batts.

 

[Buck 5,000+ posts]

havin a bank for the show or parking lots?

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Can you restate that? Not quite following.

 

[jdawg 5,000+ posts]

I was just asking cause it never made sense to me. Why try to jam at 12v and not give your amps full power? I can run my Deka 9a78dt for 8 hours with the subs turned off and it will fire the car up like nothing. If I wanted to jam at the show and show off I would want full power anyways.

 

[Buck 5,000+ posts]

I was just asking cause it never made sence to me. Why try to jam at 12v and not give your amps full power? I can run my Deka 9a78dt for 8 hours with the subs turned off for 8 hours and it will fire the car up like nothing. If I wanted to jam at the show and show off I would want full power anyways.

Keeps my lights from dimming without upgrading and limits the amount of 1/0 I have to run to the back because only power from the alt. will be going to the back.

 

[jdawg 5,000+ posts]

Keeps my lights from dimming without upgrading and limits the amount of 1/0 I have to run to the back because only power from the alt. will be going to the back.

an isolator wont fix that

 

[gotparts90 10+ year member]

Well the way the isolator was explained to me was that the alt charges both sets of batteries but they are not directly connected. The alt I believe still charges the batts.

no those stinger ones with 2 posts make the batteries connected when closed. The kind that you refer to that keep the separate are the kind you find on rvs an some boats. the ones that loopkiller posted with 3 posts are the ones you want for what you are looking for

 

[loopkiller 10+ year member]

Stinger makes both Diode and Solenoid type isolators. Those eBay links were for Solenoid types which only isolate the batteries when the engine is turned off. Diode style relays always keep the batteries separate. You should look for a diode based isolator IMO. The only downside to the diode based isolators is that you will lose around half a volt using it. So it is recommended that you increase your alt output voltage to 15.0~15.5v to offset the loss.

EDIT: I just researched another new style of isolator that is based on FETs instead of diodes. ARGO makes some, but I have not found a US source yet. I will keep looking and let you know what I find. LINK. They only go up to a 200a model as far as I can tell though.

 

[Buck 5,000+ posts]

an isolator wont fix that

no those stinger ones with 2 posts make the batteries connected when closed. The kind that you refer to that keep the separate are the kind you find on rvs an some boats. the ones that loopkiller posted with 3 posts are the ones you want for what you are looking for

Ok I posted the wrong kind then.

The one I was talking about has 3 post: 1 for alt, 1 for front battery and 1 for the back ones.

 

[Buck 5,000+ posts]

Or this is what I'm looking for (I think):

http://www.ase-supply.com/product_p/sp-31922.htm