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Old 06-01-2019, 23:41   #1
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Join Date: Dec 2009
Location: Australia
Boat: building Roberts Mauritius 43ft
Posts: 1,261
Battery charge meter.

I've been told a voltmeter is a very poor indicator of a battery's charge and google seems to support that fact.

Each cell is approximately 2 volts, so a 12volt battery has 6 individual cells. It turns out that a fully charged 2volt cell has a voltage of approximately 2.15 volts. Oddly enough, a fully discharged 2 volt cell has a voltage of 1.9 volts.

Is there a digital instrument which accurately records the state of charge of a battery? Maybe something along these lines?

https://www.ebay.com.au/itm/12V-Wate...MY9t:rk:3:pf:0
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Old 07-01-2019, 00:41   #2
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Join Date: Dec 2009
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Boat: building Roberts Mauritius 43ft
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Re: Battery charge meter.

WOW!! That eLITE battery monitor has got all the bells and whistles! I'll have to check that out.

I'm in WA so a long way from Coffs Harbor. But Andy Slorach of Bruce Roberts Boat Design used to live there and I know him well.

Is your Zeus the original Zeus that Wilf designed, built and sailed?

Clive
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Old 07-01-2019, 01:05   #3
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Join Date: May 2018
Location: Lake MacQuarie NSW AUS
Boat: Wilf O’kell Zeus 44ft
Posts: 10
Re: Battery charge meter.

Unknown history of our Zeus apart from the last 20 years, but not Wilf's methinks as we have a raked stern that came later on...
She was built by Ferrocraft in Brisbane 1985, clearly well built but heavy!

Cheers Greg
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Old 07-01-2019, 05:17   #4
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Posts: 12,649
Re: Battery charge meter.

Merlin SmartGauge, or Victron 712-BMV

Balmar SG200 may be best, but very new

Recommend a Good Battery Monitor
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