Panel Mount Voltage Meter - Fiberglass RV


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Old 07-18-2009, 04:41 PM   #1
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I know, it's the amps that count but it makes me feel better to see my battery voltage just for the heck of it.

I found this nice little panel mount voltage meter at Radio Shack for $12. The install was easy as there were power lines running right there to the light.

Please don't tell me how the voltage doesn't matter and how inaccurate it is etc. it will only make me love it more!


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Old 07-18-2009, 08:12 PM   #2
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You might want to put a switch in line so it's not constantly draining the battery.
Other than that I like it.
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Old 07-18-2009, 08:39 PM   #3
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You might want to put a switch in line so it's not constantly draining the battery.
Other than that I like it.
That's a great idea, maybe a push button momentary swith so I can just push and hold it when I want to see the voltage. Thanks!
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Old 07-19-2009, 06:59 AM   #4
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That's a great idea, maybe a push button momentary switch so I can just push and hold it when I want to see the voltage. Thanks!
Hello, this chart might be of interest when checking the battery voltage.
http://www.solarseller.com/battery_state_o...arge_charts.htm
It would be a good idea to use a more accurate digital multimeter to calibrate your analog meter.
Larry H


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Old 07-19-2009, 07:35 AM   #5
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[quote]Hello, this chart might be of interest when checking the battery voltage.
http://www.solarseller.com/battery_state_o...arge_charts.htm
It would be a good idea to use a more accurate digital multimeter to calibrate your analog meter.
Larry H


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That's a really good chart..... never seen one quite that detailed.
Memo to Me: Put Copy in my folder
Thanks,
Joe
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Old 07-19-2009, 02:08 PM   #6
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voltmeters draining battery? please explain
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Old 07-19-2009, 02:39 PM   #7
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voltmeters draining battery? please explain
If it's measuring a voltage, it's using voltage ( especially an analog meter) , maybe not much, but over say, winter you could have a dead battery. A push button will solve that problem totally.
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Old 07-19-2009, 08:37 PM   #8
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If it's measuring a voltage, it's using voltage ( especially an analog meter) , maybe not much, but over say, winter you could have a dead battery. A push button will solve that problem totally.
Hi, analog voltmeters measure voltage but use current to do so.
The push button is a fine idea to keep from running down the battery.

Joe, glad you can use the chart.

http://www.absoluteastronomy.com/topics/Vo...er#encyclopedia

Larry H
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Old 07-20-2009, 12:54 AM   #9
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I was going to point out that a voltage meter can tell you a whole lot about how much battery capacity you have left, but Larry seems to have beat me to it. If I had to choose one over the other (which I don't, my meter has an amps/volts switch on it), I'd rather have the voltage meter over an amps meter on my solar/battery system.

Worth pointing out is that different battery types have different charge voltages for different levels of charge. The values posted in Larry's chart appear to be for a traditional "flooded" battery; AGM battery peak voltages are somewhat (0.2 volts) lower.

[quote]Hello, this chart might be of interest when checking the battery voltage.
http://www.solarseller.com/battery_state_o...arge_charts.htm
It would be a good idea to use a more accurate digital multimeter to calibrate your analog meter.
Larry H


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