I too use the Optima Blue’s, but I have no option – the batteries are in the cabin. Btw. I think they are gel, but not AGM. Having them there lowers the centre of gravity and they are also close to centre of the boat (length-wise).
If you have an option to place the batteries in a compartment that is vented outside, usually the wet cells are more cost effective. My friends with RVs swear by batteries from Costco. Marek 1994 C270 “Legato” Ottawa ON Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 From: Jake Brodersen via CnC-List<mailto:cnc-list@cnc-list.com> Sent: September 5, 2016 14:00 To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com> Cc: Jake Brodersen<mailto:captain_j...@cox.net> Subject: Re: Stus-List Marine Batteries Kevin, I have been using Optima Blue Top batteries for a long time. They are an AGM type battery. The initial cost is higher, but the service life is outstanding. I only have two batteries, but I alternate using them when we race so they both get exercised. I have one that is now exhibiting signs of failure, as it won’t maintain a full charge. It is probably 6 or 7 years old and still works. I was just able to start the battery after being out on the Bay for five hours last weekend. I prefer the AGM batteries as they won’t outgas into the cabin as they age. No user serviceable parts though… :( I put a pair of Diehard AGM batteries in my Suburban. They were priced well and I may go that route this time. Since my boat batteries aren’t a matched pair, I can change one at a time. Jake Jake Brodersen C&C 35 Mk-III “Midnight Mistress” Hampton VA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Kevin Paxton via CnC-List Sent: Monday, September 5, 2016 12:39 To: cnc-list@cnc-list.com Cc: Kevin Paxton <kpax...@paxdesigns.com> 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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