And an Adler Barbour refrige unit when we need it On Sat, Jul 6, 2019 at 5:10 PM dwight veinot <dwight...@gmail.com> wrote:
> Stop that please. Everybody wants more power and batteries store power. We > use power for a lot of stuff on our boats and we try to install batteries > to hold more power than what we really need. Two group 27 deep cycle run > Alianna and she got electric head and presuurized hot and cold. Don’t try > to overdo it but big demands on avaiable 12 v power for 120v hair dryers > and microwaves. > > On Sat, Jul 6, 2019 at 1:37 PM Bill via CnC-List <cnc-list@cnc-list.com> > wrote: > >> Or this? >> >> http://www.balmar.net/services-view/sg200/ill >> >> Bill Coleman >> >> On Jul 5, 2019 2:35 PM, Olivier Chatot via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >> Hi Edd, >> >> I agree with Marek and Gary about the voltage reading not being a >> reliable indication of the state of charge. Here's an example from my boat. >> At noon my battery bank is normally back to full charge and the voltmeter >> shows 14.01V, cool. A second later the fridge starts and the voltage drops >> to close to 13V. >> >> Best, >> Olivier >> >> On Fri, Jul 5, 2019, 13:46 Marek Dziedzic via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >> Edd, >> to add to what Gary said... >> >> any measurement of the remaining capacity of the battery bank is tricky, >> because it depends on how accurate your in- and out- meters are, what the >> actual (current) total battery bank capacity is (it changes over time, >> never up) and at what SoC (state of charge) you started the measurements. >> >> I assume that your 450 Ah is a nominal capacity, but you don’t know how >> much of that is left. >> >> The 6 A you mention, is it 6 A over several hours (let’s say 3), i.e. 6 A >> times “several (3)” hours = ~18 Ah or just 6 Ah? However, on a 450 Ah >> battery bank, even 20 Ah is just under 5%, so if you started with 100% SoC >> you should be at 95% (if it was 6 Ah, the SoC should be 98.5%). >> >> As Gary mentioned, re-synchronisation is a must. >> >> The voltage you are seeing depends heavily on what is using the battery >> at the given time (as you check it). I can almost guarantee that if you >> were watching the monitor at the time of starting the motor, the voltage >> meter would show some number much lower than 12 V (even if the SoC was >> almost 100%). >> >> I am not sure if it helped you much, though >> >> Marek >> 1994 C270 Legato >> Ottawa, ON >> >> *From:* Gary Russell via CnC-List >> *Sent:* Friday, July 5, 2019 13:08 >> *To:* C&C List >> *Cc:* Gary Russell >> *Subject:* Re: Stus-List Voltage / Amp Hours >> >> 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 >> >> _______________________________________________ >> >> 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 to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ >> >> 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 to send contribution -- https://www.paypal.me/stumurray >> >> >> _______________________________________________ >> >> 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 to send contribution -- https://www.paypal.me/stumurray >> >> -- > Sent from Gmail Mobile > -- Sent from Gmail Mobile
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