el.panel ammeter showing Victron charger amps to batteries???

vas

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good morning all,

don't laugh as this is getting a bit far (yes I'm slowly running out of important jobs and are now doing detailing work), but you see on the el. panel on the lower helm, I have 5 nice square gauges like the one in the following pics.
They are:
two on the left for 24V (Volt: service-engine with a toggle under it, Amps service bank only)
one in the centre charger Amps
two on the right for 220V (Amps and Volts: shore or genny again with a toggle under it)

charger_ammeter_1.jpg


charger_ammeter_2.jpg


and a closeup of the label at the back of the gauge:
charger_ammeter_3.jpg



So, the four do their job, but the charging Amp meter does bugger all as it was connected to an OLD as in VERY OLD and extremely heavy box full of copper that was charging (1,2,3 dunno what these stages exactly meant) and a nice 12h analogue timer (with a proper bell ringing when it was off!) Nice stuff but being a liability it was all given for recycling 5yrs ago.

So Now that I have a halfdecent Victron Centaur 24V/60A which has an onboard Ammeter (which is however in the engine room so hardly accessible...) is there a way to get this lovely instrument to replicate what the Victron ammeter shows?

If it's a matter of getting two cables from somewhere inside the Victron (or the service bank batts???) and out to the gauge, I can do it no problem (just a bit more swearing getting the cables through). Cannot be the THICK cables providing power to the batteries though as we are talking about 6+6m back and forth! Must be some sort of signal which from my understanding of electricity wont work...

Before anyone tries to persuade me that it's not really needed (which I very well know!) the reasons not to bother are mainly:
  • there's a direct analogy between the 220V Ammeter next to it and this gauge, that's what I'm doing right now :rolleyes:
  • Victron is hardly ever used now with the 600W solar, and will be used for an hour on anchor every morning together with the watermaker.
  • Victron BMV-700 is next to the lower helm and I can see what's coming in (or out) of the service batteries v.accurately.


cheers

V.
 
Last edited:
Have you still got the shunt that the ammeter was connected to as that installed into the cable coming out ot the charger would work.
For this very reason I recently bought a Victron charger with Bluetooth so I can check charge status and settings on my iPhone
 
Have you still got the shunt that the ammeter was connected to as that installed into the cable coming out ot the charger would work.
For this very reason I recently bought a Victron charger with Bluetooth so I can check charge status and settings on my iPhone

nope, never thought of that when I was trying to remove all the crap from the battery tray area halfway through the rebuilt!
IF that's the only way to do it, I'm slightly stuffed...

cheers

V.
 
thanks, lots on sale apparently.
Wondering two things:

A. my gauge says 60mV, the ones on sale (bar one!) are 75mV, any difference? I guess there is
B. can I get a 60A shunt and will it work okay with the gauge or the values will be shifted? (60A is the only 60mV I found and charger is 60A anyway...)

cheers

V.
 
you could wire a shunt in the charger output line, similar as the one used for your BMV
you can work out and correct the volt ratio's from shunt and your old meter (small resistor network)
 
thanks Bart,

for circa 25euro delivered, I'm planning to try this:

https://www.ebay.co.uk/itm/DC-60mV-...732366?hash=item4b328e474e:g:0WoAAOSwuzRXfcjl

hope it works or at least is a basis for tuning as I currently don't have a shunt at all and cannot use the Victron which is measuring all coming out of the service bank.

Quick Q, do you wire this on the negative as with the Victron or the positive?

cheers

V.
 
the shunt for the BMV is wired in the negative, this is how the BMV is designed to work...

in your case, afaik it doesn't matter unless your charger housing is connected to the gnd by its housing, (or touching something)
the current might find anouther "route" so to say.

so I would wire it in the positive
 
just to close the thread,
this evening I installed this 60mV shunt on the negative (sorry Bart was hell trying to get it in the positive...) and checking it with the Victron charger Ammeter, the 40+yo needle is spot on :D
v.happy!

cheers

V.
 
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