Good Sam Club Open Roads Forum: Battery Meter
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Doclocke

Washington

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Posted: 02/09/21 01:43pm Link  |  Quote  |  Print  |  Notify Moderator

The battery status display in our motorhome leaves a lot to be desired, and I've found through experience that I can't trust it when it comes to knowing if the shore cord needs to be attached during winter storage.

I'd like to install a small dial that would be be directly wired to the battery terminals, with an on/off switch to prevent the meter itself from using juice when I don't need it.

Have any of you guys done something like that? If so, where did you find the meter?

Thanks for any suggestions.

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Posted: 02/09/21 01:50pm Link  |  Quote  |  Print  |  Notify Moderator

There are all sorts of things floating around eBay. I believe I'm going to use one of the victron bmv series. But I'm here for better suggestions as well..

agesilaus

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Posted: 02/09/21 01:51pm Link  |  Quote  |  Print  |  Notify Moderator

Look at the AiLi monitor on Amazon


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KMLsquared

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Posted: 02/09/21 01:59pm Link  |  Quote  |  Print  |  Notify Moderator

I have installed a BM2 from ebay. No local display but it is bluetooth to your phone. You can check you voltage from bed and it has data logging that allows you to see your voltage on a graph.

This past weekend I knew from bed that my batteries had died at 3 am for some reason. That reason turned out to be low water.


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Boon Docker

Mountain Foothills of Southern Alberta

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Posted: 02/09/21 02:08pm Link  |  Quote  |  Print  |  Notify Moderator

Monitor with on/off switch.

DrewE

Vermont

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Posted: 02/09/21 02:17pm Link  |  Quote  |  Print  |  Notify Moderator

Lots of digital panel meters are available at Amazon, etc. One of those plus a switch would work (though without the needle, of course).

Here is a nice looking analog gauge for battery voltage, with an appropriately sensitive range. I don't think it would be great for your purposes, though, in as much as any converter would peg it on the high side. When operating off of battery power it would be fine; maybe have a momentary pushbutton switch to connect it in under those circumstances. (No numbers on the scale, unfortunately.)





time2roll

Southern California

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Posted: 02/09/21 02:17pm Link  |  Quote  |  Print  |  Notify Moderator

Basic LCD meter will use less power than the battery self discharges.


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theoldwizard1

SE MI

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Posted: 02/09/21 04:08pm Link  |  Quote  |  Print  |  Notify Moderator

Victron Battery Monitor. Several different models, some with Bluetooth. Not cheap, but probably the best one out there.

* This post was edited 02/10/21 08:23am by theoldwizard1 *

BarabooBob

Baraboo, WI

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Posted: 02/09/21 04:13pm Link  |  Quote  |  Print  |  Notify Moderator

I use a digital voltmeter that I plug into a cigarette style outlet that I installed just inside the door of the TT. I can also use that socket to charge cameras, flashlights, anything that needs a 12 volt outlet. Cost me about $15 total and multipurpose.


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mbopp

Henrietta, NY, USA

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Posted: 02/10/21 09:54am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Basic LCD meter will use less power than the battery self discharges.

Yes, my 3-1/2 digit panel voltmeter draws 9ma (.009A). It's hard wired, no switch.


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