Hi Edd,
The battery voltage is only an indication of the state of charge of a
lead-acid battery when the battery has been without load (or charge) for
several hours. Otherwise, the voltage is pretty much meaningless. Many
devices measure the state of charge by noting the difference between the
number of amp-hours drawn and the number of amp-hours charged into the
battery. It is a more accurate indication of the state of charge but has
it's limitations as well. Any inaccuracy in measuring the current into or
out of the battery will accumulate over time requiring the device to be
"re-synchronized".
Gary
S/V Kaylarah
'90 C&C 37+
East Greenwich, RI, USA
~~~~~~~_/)~~~~~~
On Fri, Jul 5, 2019 at 12:23 PM Edd Schillay via CnC-List <
cnc-list@cnc-list.com> wrote:
> Listers,
>
> Last year, I installed a Blue Sea battery monitor and I’m a little
> perplexed about the readings I am seeing.
>
> Last night, before an amazing fireworks display at Hempstead Harbor
> (thanks to fellow Lister Neal Gallagher for the guest mooring), I looked at
> the display. Out of the 450 amp hours in the House bank, we had used around
> 6 amps between using the electric head, cell phone charging, etc. for
> several hours — with the display showing 99% capacity. But the voltage was
> showing 12.38, which I understand to mean closer to 75%.
>
> Someone on a YouTube video said that the Voltage reading is not really the
> one to go by, as the voltage will increase when you start switching things
> off.
>
> Is that all true? Is what I’m seeing normal? Can one of you Amperage Aces
> or Voltage Vixens explain this to me? (Please keep it simple - way too much
> Romulan Ale and Klingon Blood Wine flowing last night.)
>
> - Confused on City Island
>
> All the best,
>
> Edd
>
> -------------------------------—-
> Edd M. Schillay
> Captain of the “Starship Enterprise”
> C&C 37+ | Sail No: NCC-1701-B
> Venice Yacht Club | Venice, FL
> www.StarshipSailing.com
> -----------------------------------
> 914.774.9767 | Mobile
> -----------------------------------
>
>
> Sent via iPhone X
> iPhone. iTypos. iApologize
>
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>
_______________________________________________
Thanks everyone for supporting this list with your contributions. Each and
every one is greatly appreciated. If you want to support the list - use PayPal
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