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post #1 of 8 Old 06-04-2007 Thread Starter
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Ray Jefferson Battery Guard?

When purchasing my current boat, included was something called a Ray Jeffsorson Battery Guard.

It has a 120v AC plug, a dial reading from 0-15 amps, and 4 screw terminals below - 3 positives and a common ground.

Its made out of a performated metal box and looks like it is 70's vintage.

Any idea what the heck this is? A Battery charger? How does it control amp flow?

Any input appreciated as always. And thanks for answering my other questions...

Rick
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post #2 of 8 Old 06-04-2007
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Sounds like a ferro-resonant battery charger from the 70's, set up to charge up to 3 banks of batteries.

If you value your batteries, you'll just toss it and get a modern "smart" battery charger with bulk, acceptance, and float charge capability.

These needn't be expensive.

What batteries do you have? What size/type boat?

Bill
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post #3 of 8 Old 06-04-2007
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I'd second what Bill said... Does it hum when you plug it in... that's a common noticeable side effect of ferro-resonant chargers.

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post #4 of 8 Old 10-24-2012
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Re: Ray Jefferson Battery Guard?

Yes, it is a charger, of the maintenance sort, I have one I bought in 1998 new, it was acclaimed as a smart charger in 1998 but the Ray Jefferson co. packed it in over a decade ago now, so there is no longer any support for this puppy , mine is fine, I have thought of replacing it , but hey, why fix it if it aint broke, eh ?
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post #5 of 8 Old 10-24-2012
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Re: Ray Jefferson Battery Guard?

it does work for 3 banks of big ol golf cart batteries , that is what I run on "S/V Pretty Girl"
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post #6 of 8 Old 10-24-2012
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Re: Ray Jefferson Battery Guard?

I have one on Synergy. It works fine on my AGM's, getting roughly 7-8 year out of them, but its no smart charger by any stretch of the imagination and I am not a live aboard, and so rare use it.

Jeff


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post #7 of 8 Old 04-19-2015
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Re: Ray Jefferson Battery Guard?

Hi, regarding the Ray Jefferson Battery Guard Model 155, this unit is still working just fine onboard a Hunter 35, bought over in the USA in 1993 and now located in Germany at the Baltic Sea. Does anybody have the instruction manual, because it got lost someday ?
Regards
H. Petersen

If you are willing to support, please send me an e-mail to:
Navysklret2005@versanet.de

Last edited by PinkBaron; 04-19-2015 at 04:30 AM. Reason: typo
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post #8 of 8 Old 04-19-2015
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Re: Ray Jefferson Battery Guard?

I know I am 3 Yaers too late, but would you please read my post regarding Ray Jefferson Battery Guard Type 155
Regard
H. Petersen
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