Battery Montioring Physically Separated Banks - SailNet Community
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post #1 of 25 Old 03-08-2019 Thread Starter
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Battery Montioring Physically Separated Banks

I apologize if this question has already been answered somewhere, but my searching the board hasnít revealed one. I want to install a battery monitor to monitor two battery banks that are in different physical locations in my boat. Iíve looked at Victron monitors and a few others and while many are capable of monitoring two banks, they all seem to use a single shunt. This wonít work for my installation because of the distance between my banks. Short of installing two separate battery monitors, does anyone know of a product that has the ability to accept input from two separate shunts? This has to be a common problem that one of you has already licked.
Terry

S/V Kestrel
Catalina 42 MK II
Colonial Beach, Virginia
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post #2 of 25 Old 03-08-2019
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Re: Battery Montioring Physically Separated Banks

Not enough information.

solutions:

re locate one bank to be close to the other
replace one bank with a small new one for starting (sealed which do not need a battery box)
charge only main (large) bank from alternator etc. Use echo charge to charge start bank

pay attention... someone's life depends on it
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post #3 of 25 Old 03-08-2019
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Re: Battery Montioring Physically Separated Banks

Two separate BMs is best, recommend SmartGauge.

Victron has central display/comms units GX Colour is one, can tie in to multiple BMV-712


Single BMs using multiple shunts are rare.

Bruce @ OceanPlanet was testing one, but not very accurate?

Bogart Pentametric is a good one, but maybe not designed for marine use?

Maybe Maretron?
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post #4 of 25 Old 03-08-2019
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Re: Battery Montioring Physically Separated Banks

The Balmar Smart Gauge monitors the house bank and the start battery, although it only gives a voltage reading for the start battery. Which for me is good enough. And there is no shunt involved....just a matter of wiring the smart gauge to the batteries.
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1981 Endeavour 32

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post #5 of 25 Old 03-08-2019
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Re: Battery Montioring Physically Separated Banks

The Balmar SG200 with an extra ďSmart ShuntĒ can do what you want..
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Re: Battery Montioring Physically Separated Banks

Andy and Maine Sail,
It looks like the Balmar is exactly the kind of thing I am looking for. By getting an extra Smartshunt, I can monitor my windlass battery which is far away from my house bank. Thanks so much for chiming in.

Has anyone else experience with Balmar? Opinions?

For anyone interested, here is a link to the monitor on the Balmar webpage.

http://www.balmar.net/sg200-battery-monitor/

Terry

S/V Kestrel
Catalina 42 MK II
Colonial Beach, Virginia
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Re: Battery Montioring Physically Separated Banks

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Originally Posted by Terry L View Post
Andy and Maine Sail,
It looks like the Balmar is exactly the kind of thing I am looking for. By getting an extra Smartshunt, I can monitor my windlass battery which is far away from my house bank. Thanks so much for chiming in.

Has anyone else experience with Balmar? Opinions?

For anyone interested, here is a link to the monitor on the Balmar webpage.

http://www.balmar.net/sg200-battery-monitor/

Terry
This
https://search.defender.com/?SI=ef15...ttery%7e299.99
is $300 and you can use the monitor you have by placing the new batt close the the house bank. It's hardly more money than the Balmar...

pay attention... someone's life depends on it
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Re: Battery Montioring Physically Separated Banks

Quote:
Originally Posted by Terry L View Post
Andy and Maine Sail,
It looks like the Balmar is exactly the kind of thing I am looking for. By getting an extra Smartshunt, I can monitor my windlass battery which is far away from my house bank. Thanks so much for chiming in.

Has anyone else experience with Balmar? Opinions?

For anyone interested, here is a link to the monitor on the Balmar webpage.

http://www.balmar.net/sg200-battery-monitor/

Terry
We (marinehowto.com) were part of the Alpha test team and spent over a year testing and putting the SG200 through its paces. The SG200 has replaced the traditional Coulomb counter on my own boat because, no matter what, the traditional Ah counter would get out of sync with the bank..

The SG200 is an entire paradigm shift in battery monitors in that it self learns your bank to track both SOC and SOH (State of Health) this means virtually no work on your part to keep the battery monitor in sync with your bank..
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Re: Battery Montioring Physically Separated Banks

I have a Link 20 and I find it is probably accurate for amperage and voltage readings. AHs used / left and so an are simply unreliable.

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Re: Battery Montioring Physically Separated Banks

Quote:
Originally Posted by Terry L View Post
It looks like the Balmar is exactly the kind of thing I am looking for. By getting an extra Smartshunt, I can monitor my windlass battery which is far away from my house bank.
Here are some past threads
http://www.cruisersforum.com/forums/....php?p=2780484

http://www.cruisersforum.com/forums/...d.php?t=209056

http://www.trawlerforum.com/forums/s...ons-41709.html

As a general rule, listen to Maine Sail / CMS.

My only reservation about SG200 is that it is so new, and does not actually show the AH in / out basis for its SoC estimate.

On the plus side, integrating Active Impedance Compensation (similar tech to Merlin SmartGauge) with coulomb-counting is a fantastic step forward, and

trying to get a SoH reading on residual capacity is truly unique, hardly anyone actually does 20-hour load testing.

And the fact that it's designed to track multiple banks, perfect for your use case.

Trickier to install than SmartGauge, might want to get a pro to at least help verify. . .
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