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Old 06-03-2015, 14:45   #16
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Re: Expensive vs Cheap Amp Meters

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Originally Posted by Maine Sail View Post
Just one caution....

Be sure your shunt can handle the system loads for where you place it in the system. I have seen undersized shunts get whacked with high current and lose accuracy and in one case actually lose solder.......

If your highest system load is your engine cranking circuit you want a shunt that can handle that with ease. If it is a bow thruster, electric winches, windlass etc. it too needs to handle those with ease... Most reputable Ah counter manufacturers ship 500A rated shunts and most often 50mV.

To me one of the best values, for what you get, is the Victron BMV-700....

Once again thanks!

As I understand you 500amps is the way to go. That leaves room for the starter motor, running cooler and a future anchor windlass all to be on and not mess things up.

I am going to shunt the ground leg as that is IMHO safer.



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Old 06-03-2015, 14:52   #17
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Re: Expensive vs Cheap Amp Meters

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Once again thanks!

As I understand you 500amps is the way to go. That leaves room for the starter motor, running cooler and a future anchor windlass all to be on and not mess things up.

I am going to shunt the ground leg as that is IMHO safer.



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There are plenty of good quality 50mV 500A shunts. Blue Sea and others sell them. Be aware than many of the cheap Chinese ammeters use 75mV or 100mV shunts, which are also available.......

AltE often has some decent shunts...
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Old 06-03-2015, 18:50   #18
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Re: Expensive vs Cheap Amp Meters

We have a TriMetric 2020 and I love it. I got the shunt for EUR 16,00.

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Old 06-03-2015, 20:07   #19
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Re: Expensive vs Cheap Amp Meters

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Once again thanks!

As I understand you 500amps is the way to go. That leaves room for the starter motor, running cooler and a future anchor windlass all to be on and not mess things up.
Do you really need to know the draw of the starter motor? Why not get a smaller meter to more accurately watch just the domestic draw, that's what your really interested in?
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Old 06-03-2015, 20:15   #20
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Re: Expensive vs Cheap Amp Meters

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Originally Posted by Snore View Post
Once again thanks!

As I understand you 500amps is the way to go. That leaves room for the starter motor, running cooler and a future anchor windlass all to be on and not mess things up.

I am going to shunt the ground leg as that is IMHO safer.



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Shunts in the positive are fine, simply put in-line fuses (on each lead) close to the shunt.
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