John, If your only charging is from the motor/alternator you would never be able to fully charge your batteries (unless you motor a lot - like several hours at a time). You can easily extend the life of the batteries and have them fully charged (I.e. have more usable capacity) if you install some solar panels. A low-cost solution (not a cheap one) should not cost you more than $150. A Genasun controller (around $65) and a 50 W (even a 25 W) panel ($50 - $150, depending on size, quality, type, model etc.). We don't have shore power at our Club, so it is more or less like on a mooring. I use a 24 W flex panel (installed on the Bimini) and it provides about 1 A max current and about 5-8 Ah a day. Even if I sail twice a week (I wish I could do that often), this provides more than enough charging capacity for my needs. If you stay overnight, you need more battery capacity anyway. Just my 2 cents. Marek
Sent from my Bell Samsung device over Canada's largest network.<div> </div><div> </div><!-- originalMessage --><div>-------- Original message --------</div><div>From: John and Maryann Read via CnC-List <cnc-list@cnc-list.com> </div><div>Date: 9/5/16 14:34 (GMT-05:00) </div><div>To: cnc-list@cnc-list.com </div><div>Cc: John and Maryann Read <johnpr...@comcast.net> </div><div>Subject: Re: Stus-List Marine Batteries </div><div> </div> Hi Kevin Welcome to the group and know you will enjoy your 34. What is your hull number? We are second owners of ours and owned her for 17 seasons. Race and cruise. We run 2 group 27 deep cell batteries. Use an off-1-both-2 switch make before breaking. Standard Yanmar 3GM with 35 amp alternator which is only charger. Stay on a mooring. Alternate batteries based on even or odd day of the month. System works just fine Battery is from local chandlery / generic brand made in CT. Last about 5 years then will fail to hold a charge. Volt meter tells the story in a hurry. $150 cheap enough to replace Feel free to contact me with any questions John and Maryann Legacy III 1982 C&C 34 Hull 464 Noank, CT From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Kevin Paxton via CnC-List Sent: Monday, September 05, 2016 12:39 PM To: cnc-list@cnc-list.com Cc: Kevin Paxton Subject: Stus-List Marine Batteries Hey everyone. Just recently subscribed to the list. Purchased a '82 C&C 34 a few years ago. Been sailing it around the Chesapeake on brief day sails so far with the aim to have a few overnighters soon once the kids get a little older. We are based in Pasadena up Cornfield Creek. I'm lucky enough to have a community dock with slips that are real cheap. :-) Anyways, both of my group 27 batteries got completely discharged since the last time I checked them. So I need to either determine if there is any way to salvage them or decide on a new set of batteries. Any suggestions on good batteries or ones to stay away from? Is there any gain to trying to revive them? They power a Yanmar 3gm30f and I haven't had any issues with starting them, but keeping them charged for any amount of time has been challenging. So I've been thinking of getting one that is a dual purpose and the other a true deep cycle for use as a house battery. What kind of combinations do others have? Thanks!! Kevin '82 C&C 34 #473? Japhy's Spirit (needs a rename, thinking 6 Pax, family of 6 Paxton is last name)
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