There is a 4th issue too for wet cell batteries. While AGMs and Gels have more options for orienting the batteries in your box, wet cell battery orientation matters in sailboats. One should orient the batteries artwartship (i.e. the long end of the battery turned beam to beam) as apposed to parallel to the boats centerline. You will kill your batteries much sooner while healing if your wet cell batteries are along the centerline. This is because the wet cells that make up the battery are longer along the battery width and short along the battery length, so a heeled battery has more exposed lead plates if its along the centerline. It's like running your batteries low on water.
- Paul E. 1981 C&C 38 Landfall S/V Johanna Rose Fort Walton Beach, FL http://svjohannarose.blogspot.com/ > On Apr 6, 2018, at 11:58 AM, cnc-list-requ...@cnc-list.com wrote: > > Date: Fri, 6 Apr 2018 15:57:46 +0000 > From: "Della Barba, Joe" <joe.della.ba...@ssa.gov > <mailto:joe.della.ba...@ssa.gov>> > To: "'cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>'" > <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> > Subject: Re: Stus-List Marine Batteries GOLF CART > Message-ID: > <843aa5b0a3624974bf3298813a4b0...@nsc-dag3-06.ba.ad.ssa.gov > <mailto:843aa5b0a3624974bf3298813a4b0...@nsc-dag3-06.ba.ad.ssa.gov>> > Content-Type: text/plain; charset="utf-8" > > You have 3 issues. One is physical space. They are wet cells, so they need to > fit into battery containers and those containers need to fit into the boat. > The second is electrical. They take different charging voltages than the AGMs > or gels they might be replacing and they need equalizing every so often, so > your charging setup must be able to accommodate that. Trojan has some pretty > good docs here > (http://www.trojanbattery.com/tech-support/battery-maintenance/ > <http://www.trojanbattery.com/tech-support/battery-maintenance/>) Bulk > voltage for them and I would assume most other golf cart types is 14.8 volts. > This is a lot higher than gel or AGM require. They float at 13.5, which is > lower than usual. Equalize is 16.2 volts. The third issue is self-discharge. > Unlike gel/agm that have very low self discharge, wet cells can lose up to > 10% per month. If you are on a mooring or otherwise have no shorepower, you > will really need a solar panel to keep them topped up. > > Joe > Coquina > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com > <mailto:cnc-list-boun...@cnc-list.com>] On Behalf Of David Knecht via CnC-List > Sent: Friday, April 06, 2018 10:44 AM > To: CnC CnC discussion list > Cc: David Knecht > Subject: [EXTERNAL] Re: Stus-List Marine Batteries (Dreuge) > > I have been following this thread with interest because I suspect my AGM?s > have been mistreated and may need replacement. What modifications to the > setup are needed if the 6V fit in the battery compartment? I presumed you > would just wire the double 6V in series and everything else would be the > same? Dave > > Aries > 1990 C&C 34+ > New London, CT
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