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Battery kill switch
#1329345 Wed Oct 09 2019 02:15 PM
Joined: Feb 2019
Posts: 843
Phak1 Offline OP
AD Addict
I want to install a battery kill switch in my 52’ chevy 1/2 ton, and I was looking on flea bay and I noticed that the cheaper ones were only rated for 20 amps continuous use, 125 amp surge. With a 63 amp 12 volt alternator, that rating seems to be a bit low. The next step up is 175-200 amp continuous and 1000 amp surge and that seem a bit of overkill.

Your opinions?


1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Battery kill switch
Phak1 #1329346 Wed Oct 09 2019 02:24 PM
Joined: Jan 2013
Posts: 1,662
Shop Shark
Phak, I used an automotive latching solenoid, not only is it a battery kill switch but it will act as an anti theft device. It actuates by a momentary switch hidden in only a place you know about, its sole purpose is to interupt the entire battery voltage so it is either all on or all off. Rated to 125 amp so it will start your truck no problemo. This is a 12 volt model, they have 6 as well.

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Last edited by sstock; Wed Oct 09 2019 02:46 PM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
Re: Battery kill switch
Phak1 #1329354 Wed Oct 09 2019 05:38 PM
Joined: May 2005
Posts: 1,638
Shop Shark
As sstoke stated, it not the alternator output one needs to be concerned with. It’s the starter current one needs to build to. Bigger (more amp capacity) is better. I have somewhat the same setup as sstroke. I used a silver contacts golf cart solenoid.

Six volt guy living in a twelve volt world

Moderated by  Rusty Rod 

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