Comments on: Which Battery Post Do You Connect First: Positive or Negative?

By: madhavi

madhavi — Wed, 11 Apr 2012 07:19:55 +0000

for 3hrs back up.how much battery rating should be used.

By: Aubrey Eischens

Aubrey Eischens — Tue, 27 Mar 2012 11:36:30 +0000

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By: Bindu

Bindu — Tue, 06 Mar 2012 11:56:53 +0000

sir,may I know the minimum ampere-hour(of a 12volt battery) required to supply a inverter of 70watt output.
please answer me as earlier as possible

By: daddysamuel

daddysamuel — Tue, 10 Jan 2012 20:45:11 +0000

I have 1 unit of 12volts battery @ 100amp and 6 units of 2 volts @ 200amps each. I can connect either 12v or 24v, but I have to move cables around each time, this is not very comfortable. I also a 12volts solar panel and a 24volts charger. How can I connect them such that I get a high breed configuration, where either the solar board or the electric charger can work without my having to move cables around. I also want both the solar panel and the electric charger to work at the same time if need be. Thanks.

By: tajo

tajo — Sun, 16 Oct 2011 17:31:57 +0000

Hi,

What happens if you accidentally series positive terminal to positive and then, negative terminal to negative instead of ground? would you damage any of the cars?

Thanks Robin

By: Robin

Robin — Tue, 04 Oct 2011 20:03:31 +0000

It could be because there is a power draw on the system such as a stereo (internal clock and memory).

By: Abdullah

Abdullah — Mon, 03 Oct 2011 09:49:07 +0000

hi.. nice and informative column. i just want to ask that i connected the positive first but as i tried to tighten the negative, it sparked twice.. what would be the reason for that?

By: dooper doo

dooper doo — Mon, 18 Oct 2010 22:21:25 +0000

im sure there can be good arguement for EITHER WAY, sorry, i was a auto mechanic for 6 years and worked in industrial electrical (ac and dc) for 3. it was the position of Ford in one city, and chevrolet in another if you do red first, you can risk grounding the battery on ANYTHING metal under hood threw the negative cable. so hook black first, that way the circuit can ONLY be completed when you attach the positive to the terminal.

By: nicholas baker

nicholas baker — Fri, 23 Jul 2010 11:14:04 +0000

I have a 36 volt system on my golf cart. I am trying to reconnect the batteries. When I try to put on my last jumper wire I get fireworks (sparks). What am I doing wrong?

By: Morgan Jones

Morgan Jones — Fri, 16 Apr 2010 11:39:55 +0000

Thanks for the reply. Hey – I really enjoyed the story about how you guys had to repair the hole in the battery! Sometimes things happen that are horrible at the time, but end up being something that makes the trip memorable (as long as no one gets permanently hurt lol). Love the website. Keep up the good work.
Morgan