| I’ll add (from experience) that if you are daysailing and otherwise plugged in at the dock, you can (unwittingly) do without an alternator for quite some time as well….
Dave
Sent from my iPhone On Feb 20, 2024, at 11:06 AM, Richard Bush via CnC-List <cnc-list@cnc-list.com> wrote:
Joe, thanks for the reassurance on the group 27's! That's what I have and I have been worried that I am missing out on something with my old batteries, but we are always tied to a dock as you describe, so I am good ---(for now)....!
Richard
1985 C&C 37 CB: Ohio River, Mile 596;
Richard N. Bush Law Offices 2950 Breckenridge Lane, Suite Nine Louisville, Kentucky 40220 (502) 584-7255
On Tuesday, February 20, 2024 at 10:57:31 AM EST, Della Barba, Joe via CnC-List <cnc-list@cnc-list.com> wrote:
If you are primarily going dock to dock and don’t care about being anchored out or underway for days, the old standard two group 27 batteries will do just fine, you are only dealing with hours of no engine, not days.
I would still go AGM just because I hate wet batteries. We had one crack open in a hurricane and the extra-special smell was not appreciated.
Joe Della Barba
Coquina
From: CHARLES SCHEAFFER via CnC-List <cnc-list@cnc-list.com>
Sent: Friday, February 16, 2024 1:58 PM
To: Stus-List <cnc-list@cnc-list.com>
Cc: CHARLES SCHEAFFER <cscheaf...@comcast.net>
Subject: [EXTERNAL] Stus-List Re: Lithium vs AGM
I watched hundreds of videos installing lithium battery systems in sailboats and also in RVs. I found MarineHowTo.com had a link to Victron diagrams and there
are many many videos describing each Victron module on YouTube.
I didn't go very deep into solar panels, which is probably where I'd start if our boat was on a mooring.
My situation is different.
Our boat is in a slip with 30amp power available and we enjoy air conditioning, no extra charge. I couldn't build a lithium/solar system large enough to support
air conditioning so it lost a lot of attraction. We mostly daysail and return to the slip. When we cruise, my wife prefers a marina over anchoring out, where they have a pool, so we take a slip at a marina and plug in. We enjoy walking strange towns and
learning the history and finding good restaurants and live music and meeting new people. It's all part of the adventure of cruising.
Chuck Scheaffer, Resolute 1989 C&C 34R Annapolis
Chuck, Bill and any others:
I am in a similar position; my batteries are on their last legs. Was hoping to make another season with them but need to dive into LFP batteries as a potential replacement. Some
people really like AGM, but my understanding is they need to be brought back to 100% SOC and I am on a mooring so cannot just plug in at the end of the day.
Where / what sites have you been using to learn about LFP batteries? So far I have looked [but need to spend more time at] Rod Collins “Marine How To” site, and Ocean Planet.
I also need to get up to speed as best as I can on solar – so any suggestions there as well. Have spent some time on the “alltestore . com” site.
Thanks,
Brian
I am replacing my 12 and 13 year old AGM batteries with AGMs. I spent at least 40 hours this winter
learning about Lithium, because decent lithium batteries can be found for a few dollars more than AGMs. But I don't have room on my boat for the inverter/charger and all the costs of that and all the modules and cables, required to complete a system like
that, pushes a lithium project way over my budget. I am installing a Victron shunt to read my power useage and monitor various loads, and I'm adding some fuses at each battery, so I can always upgrade the system later, if it's warranted.
I'll be adding a cheap 1000watt pure sine wave inverter to power my TV, DVD, chargers and coffee maker.
Curious about your project.
Chuck Scheaffer, Resolute 1989 C&C 34R, Annapolis
I'm a little surprised, I would have expected a progressive fellow such as yourself to be jumping into lithium. I am wasting an inordinate amount of time researching charger inverters,
and I think although the lithium batteries may come down more in the future, I think because I need new batteries the time is now.
I recently got a big AGM battery that needs a big charger. I have a ProNautic 15 amp charger with a battery temperature probe that is necessary for correct charging of any lead-acid
battery. It can charge 1, 2, or 3 batteries and has a lot of settings for various charge profiles.
It works fine, it is only being removed because I got a bigger charger. They sell for $350-$400 new, I will send this one to any USA address for $150 shipped. Canada might be more,
I would have to check.
(Odyssey battery company told me they want their battery charged with at least a 30 amp charger and ideally a lot more, apparently they need to be hit hard to stay good)
Joe Della Barba
Coquina C&C 35 MK I
Kent Island MD USA
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Thanks for your help.
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Thanks for your help.
Stu
Please show your appreciation for this list and the Photo Album site and help me pay the associated bills. Make a contribution at: https://www.paypal.me/stumurrayThanks for your help. Stu
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