Isolating two batteries

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=974
Printed Date: September 13, 2025 at 8:56 AM

Topic: Isolating two batteries

Posted By: CutDog504
Subject: Isolating two batteries
Date Posted: May 27, 2002 at 2:51 PM

I currently have two batteries in my car. Had them isolated with a 200 amp stinger relay/solenoid that a friend gave me. He had it laying in his backyard, out in the weather, so needless to say, it has now qwit working on me. What I wanted to know was, can I use a ford starter solenoid in place of this? Will this work? Cuz I was looking under the hood of my friends mustang, and his starter solenoid looks almost identical to that stinger one. I'd much rather pay 20 bucks for a starter soleniod, than to pay 100 bucks for a stinger one. You think this will work?? So if anyone has ever done this, lemme know.

Replies:

Posted By: CutDog504
Date Posted: May 30, 2002 at 1:13 AM

WHAT??? NOBODY CAN HELP ME WITH THIS??? posted_image

C'MON PEOPLE, PLEEZE???

Posted By: bberman1
Date Posted: May 30, 2002 at 10:16 AM

I’m not sure if the ford one would work or not. Here is a link it will tell you different ways of running two batteries, and everything else in between. Scroll down on the rite side and click the link battery isolators. https://www.eatel.net/~amptech/elecdisc hope this was of some.

Posted By: partyanimal
Date Posted: June 04, 2002 at 8:34 PM

the easyest thing for you to do would be to go out and buy a bigger alternator for your car... that way you dont need a secondary power sorce for your system

Posted By: NyxBass
Date Posted: June 05, 2002 at 1:14 PM

"the easyest thing for you to do would be to go out and buy a bigger alternator for your car... that way you dont need a secondary power sorce for your system "

Not nessecarily - If I want to run my system without running the motor, no alternator in the world will help me not drain a single battery. The point of a second battery is to run a system without the engine on, without discharging the starting battery. A bigger alternator, on the other hand, will let you draw more current when the car is running, without discharging the battery as you drive.

To answer the original question - you probably could use that soloniod, but i would make sure you have it hooked up correctly - check the site above and be careful - wouldn't want to hurt any amps!

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/NyxBass

Posted By: Big Dog
Date Posted: June 05, 2002 at 2:46 PM

Hey CutDog504,

I know what you're talking about that it looks like a Ford solenoid but it 's not the same. I tried using a Ford solenoid this way and the coil heated up and didn"t last very long. There does exist a solenoid though that is used on tractors as an "ACC" built by Seimans and is blue in color check out the local auto parts stores for this make and be sure it's the Heavy Duty type. posted_image

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