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Old 06-05-2012, 11:36 AM   #1
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Battery Monitors

We had a Trimetric 2020 battery monitor on our previous trailer to keep track of the Amp/Hr capacity in the battery bank. I'm about to install a system in our new 22RBXL, and I havn't noticed much discussion about monitors and wondered if any one else has experience with them. The Trimetric 2020 and shunt will cost me about C$205.

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Old 06-05-2012, 11:44 AM   #2
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There are a few users on the forum. Herk has one but I think its the 2025.

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Old 06-05-2012, 12:51 PM   #3
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Doesn't displaying/tracking the battery voltage accomplish the same thing?


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Old 06-05-2012, 01:54 PM   #4
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my monitor is incorporated into the charge controller system for my solar panels. had I not installed the panels, the trimeteric 2025 would have been my choice
2000 Cherokee 29BH with 6V batteries, LED lights & 400 watts of solar power, flipped axles and raised. 2007 Tundra 5.7L DC-LB with lots of mods. C-co, 8/158th AVN Maint.
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Old 06-05-2012, 06:55 PM   #5
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Gauging the health of a battery by its voltage is inaccurate.

I just installed a TM-2020 in my TT when I changed out its batteries.
I have used this meter in houses for installs - it has a great reputation and long history.

I also bave a Pentametric that I intend to install in its place in my TT, but couldn't get it done before my first trip out for the year. It will allow me to connect the batteries and solar on seperate inputs to record use/generation and upload to my laptop (real geeky like)
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Old 06-05-2012, 07:13 PM   #6
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BJAY - I am looking at going this route as well - where are you planning on purchasing? In Canada or are you looking at getting one shipped from the US ?
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Old 06-05-2012, 09:52 PM   #7
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Dave- I agree with Saratoga Camper- Not accurate enough. I tried that route the first year and knew I wanted something better.
Buzz Monster- I got mine from in New Brunswick. I don't like the customs charge surprises coming across the border. I bought two 115w 24v panels this week in Maple for $138 ea. 4 years ago the same panel cost me $445 ea.
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Old 06-05-2012, 10:12 PM   #8
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Check ebay. I just bought a XX.XX digital display for 8 dollars delivered. The same supplier also has DC Ammeters with shunt for around 15 dollars. Between the two should give you more than enough information on battery strength.
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Old 06-06-2012, 09:15 PM   #9
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Donn- I believe the ammeter with shunt will show amps only, not amp/hrs. The battery monitors are basically an ammeter with shunt plus a processor that relates amps to time so it can give amp/hrs+(charging) and amp/hrs-(discharging), and then keeps a running total for battery charge level. The processor would appear to be the reason for the big difference in price.
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Old 06-06-2012, 09:36 PM   #10
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I totally love my TM-2025RV.

It does so much more than measure voltage and current amp usage.

By placing the shunt on the ground leg, the unit displays charging amps; discharge amps; percent of total battery AH capacity remaining; voltage measured in 10ths of a volt; and amps in 10ths of an amp (100 milliamp).

Trimetric TM-2025A Battery Monitor System

You will also need to buy the shunt.

Oh, BTW the batteries were being charged off the truck's alternator at the time of the photo.
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File Type: pdf UsingTriMetric Battery Maintain.pdf (61.0 KB, 25 views)


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battery, led pad

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