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Someone here said [message #181387]

Thu, 23 August 2012 06:49

Ken Burton

Messages: 10030
Registered: January 2004
Location: Hebron, Indiana

Karma:

Senior Member

Do NOT wire 12 volt batteries in parallel.

I picked up three 12 volt 18 ah 3 year old batteries at a hamfest for $15.00. I intended to use two of them to power my 12 volt refrigerator in my Blazer when I'm parked overnight. I wired 2 of them in parallel and have been testing them as a back up for my ham radio APRS I-gate for about 4 weeks.

Yesterday I put the 12 volt cooler and 2 batteries in the Blazer in preparation for my departure this morning. This morning I was in the garage under the hood checking my oil and other things when all of a sudden smoke started rolling out of the back of my Blazer. I mean a lot of smoke. It filled the garage in about 20 seconds. It was the batteries. I managed to pull the battery box out of the back of the Blazer and carted it outside. Then I got them separated which stopped the smoke source. Then end result is one of the batteries has a shorted cell. I had wired them with 16 gauge wire and the smoke was the wiring burning up. I had no fusing between them so the good battery was discharging into the shorted one. These are two identical batteries of the same age and manufacturer. They came out of a back up UPS on a routine maintenance change.

Wait a minute!

That guy that said on GMCnet not to put batteries in parallel WAS ME.

I hate it when I get caught not following my own recommendations.

DO NOT WIRE 12 VOLT BATTERIES IN PARALLEL

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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[Message index]

		Someone here said By: Ken Burton on Thu, 23 August 2012 06:49
		Re: Someone here said By: WD0AFQ on Thu, 23 August 2012 08:00
		Re: Someone here said By: Matt Colie on Thu, 23 August 2012 08:08
		Re: Someone here said By: tphipps on Thu, 23 August 2012 08:13
		Re: Someone here said By: GeorgeRud on Thu, 23 August 2012 10:36
		Re: Someone here said By: midlf on Thu, 23 August 2012 21:48
		Re: [GMCnet] Someone here said By: ljdavick on Thu, 23 August 2012 21:53
		Re: [GMCnet] Someone here said By: midlf on Thu, 23 August 2012 22:08
		Re: [GMCnet] Someone here said By: Harry on Thu, 23 August 2012 22:42
		Re: [GMCnet] Someone here said By: Carl S. on Sat, 25 August 2012 22:10
		Re: [GMCnet] Someone here said By: Matt Colie on Fri, 24 August 2012 09:01
		Re: [GMCnet] Someone here said By: midlf on Fri, 24 August 2012 13:02
		Re: [GMCnet] Someone here said By: jhbridges on Sat, 25 August 2012 08:32
		Re: [GMCnet] Someone here said By: midlf on Sat, 25 August 2012 19:51
		Re: [GMCnet] Someone here said By: Ken Henderson on Sat, 25 August 2012 21:17
		Re: [GMCnet] Someone here said By: USAussie on Sat, 25 August 2012 21:59
		Re: [GMCnet] Someone here said By: Mr ERFisher on Sat, 25 August 2012 22:39
		Re: [GMCnet] Someone here said By: mickeysss on Sat, 25 August 2012 22:55
		Re: [GMCnet] Someone here said By: Gary Berry on Sun, 26 August 2012 00:20
		Re: [GMCnet] Someone here said By: jhbridges on Wed, 29 August 2012 06:21
		Re: [GMCnet] Someone here said By: Ken Burton on Sun, 26 August 2012 00:38
		Re: [GMCnet] Someone here said By: USAussie on Sun, 26 August 2012 10:03
		Re: [GMCnet] Someone here said By: Adrien G. on Sun, 26 August 2012 01:51
		Re: [GMCnet] Someone here said By: Ken Burton on Sun, 26 August 2012 02:15
		Re: [GMCnet] Someone here said By: mickeysss on Sun, 26 August 2012 02:25
		Re: [GMCnet] Someone here said By: jhbridges on Sun, 26 August 2012 11:17
		Re: [GMCnet] Someone here said By: k2gkk on Sun, 26 August 2012 12:41
		Re: [GMCnet] Someone here said By: habbyguy on Sun, 26 August 2012 14:27
		Re: [GMCnet] Someone here said By: jhbridges on Wed, 29 August 2012 07:05
		Re: [GMCnet] Someone here said By: jhbridges on Wed, 29 August 2012 06:49
		Re: [GMCnet] Someone here said By: midlf on Sat, 25 August 2012 22:42
		Re: [GMCnet] Someone here said By: Russell Mehlenbacher on Sun, 26 August 2012 05:31
		Re: [GMCnet] Someone here said By: jhbridges on Sun, 26 August 2012 11:10
		Re: Someone here said By: Jim Wagner on Thu, 23 August 2012 11:50
		Re: Someone here said By: Ken Burton on Thu, 23 August 2012 12:37
		Re: Someone here said By: A Hamilto on Thu, 23 August 2012 13:43
		Re: [GMCnet] Someone here said By: ljdavick on Thu, 23 August 2012 19:00
		Re: [GMCnet] Someone here said By: ljdavick on Thu, 23 August 2012 19:15
		Re: Someone here said By: winter on Thu, 23 August 2012 17:03
		Re: Someone here said By: Ken Burton on Thu, 23 August 2012 23:52
		Re: Someone here said By: deanandcheriek on Fri, 24 August 2012 00:24
		Re: Someone here said By: MIGUEL MENDEZ on Fri, 24 August 2012 08:54
		Re: Someone here said By: kerry pinkerton on Sun, 26 August 2012 08:04

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