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Battery Meter

As we do a lot of dry camping, it is important that we keep a close eye on the state of the batteries.  I looked at several meters from simple Green - Yellow - Red  LEDs to fancy computers with shunts to allow monitoring amperage usage.

 

I settled on a more price conscious meter which allows us to camp with confidence that we will not run out of power.

All photos are thumbnails, click to see an enlarged version

I started with an inexpensive multimeter that I had in the bottom of my toolbox.  I think I originally paid $9.00 for it
I added a 1/4" phone jack (mono).  While you can get these at radio Shack, they are cheaper form some mail order companies like All Electronics.
I just plug it in and turn it on.  It can be plugged into any of the lights on my Santa Fe.
Here it is plugged into the outside light.
A close-up shows 12.62v DC

 

I use the chart from the bottom of Mark Nemeth's page titled The 12 Volt Side of Life, Part 1 to keep track of the batteries.

 

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   Revised: May 08, 2007

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