I don't know Atomic 4's but with a diesel it would be a no brainier for me - dual purpose as big as I could fit. Everyone one this list hates me for saying it but I wouldn't go near either a car battery or a golf cart battery. Current marine stuff is too good and fits into the designed space.
John Sent from my iPad > On May 18, 2015, at 6:56 PM, jtsails via CnC-List <cnc-list@cnc-list.com> > wrote: > > I agree with everything Rick said, but I am going to throw a little different > question into the equation. I was in the same boat (ha, ha) with bev last > year. Over the winter I rebuilt the system with two group 31 flooded wet > cells for the house bank and was hoping to repurpose the better grp24 from > the old system as a dedicated start battery and an echo charger to keep it > topped up. The old group 24 is too weak to start a cold Atomic 4 so it has > to go....so the 64 dollar question is what do I replace it with, deep cycle > (has plenty of amps to start an Atomic 4) or a car battery (lots of amps, > will last a long time????) or maybe one of the in-betweens dual use > batteries. I’m leaning toward the deep cycle or in-betweens. Thoughts? > James > C&C 38 > “Delaney” > Oriental, NC > > > From: Rick Brass via CnC-List > Sent: Monday, May 18, 2015 6:19 PM > To: cnc-list@cnc-list.com > Cc: Rick Brass > Subject: Re: Stus-List House/starting batteries. > > Bev; > > When I bought my first “real” boat (the C&C 25 that I still own) and was > chartering in Chesapeake Bay in the early 90s, the practice you follow was > the normal and preferred method of maintaining your batteries. On odd number > days start with battery 1, switch to “all” for charging when the engine was > running (assuming you had a “Make-before-break” battery switch so you would > not blow out the diodes in the voltage regulator), and then switch back to > battery 1 as the house bank when the engine was turned off. On even number > days, same process using battery 2. > > But at the time, house loads were small. Refrigeration was a rarity. Ditto > radar. No TVs. No microwaves. Just some lights and an FM radio. And boats had > just two batteries – usually deep cycle 24s or 27s. > > As things changed and more “stuff” got installed on boats, the practice > became having a large house bank and a smaller starting bank. For example, my > 38 has 460AH of house and 95AH of starting battery, and the house bank will > meet my needs for about 3 days at anchor. The norm changed to use the start > battery just for starting the engine and the house bank for when the engine > was off. Charge on “all” or just switch to the house bank for charging. That > gives lots of AHs for running the “stuff” on the boat, and ensures you have a > fully charged battery for starting the engine. > > The current best practice and preferred method has continued to evolve as > more electronics and comfort gear continues to be a part of boating. Now the > norm is more in line with what Edd Schilly just did in his rewiring. Big > house bank. Small start battery. Start battery wired direct to starter for > starting. Alternator wired directly to the house bank for charging, with an > echo charger or ACR between house and start banks to recharge the start > battery after the house bank is recharged. And you only use the 1-2-all > switch (or a battery combiner) to combine the batteries if you need to start > the engine using the house bank for some odd reason. > > The practice you follow still works just fine if you use your boat for day > sailing or short trips, have 2 equal size batteries, and have the discipline > to follow the process. My 25 has 2 group 27 deep cycle batteries and only a > few lights and an electric head – and that is the process I still us. > > If you are a cruiser and spend more time on the hook with a boat having a > significant amount of “comfort” gear, you should probably consider adding to > the house bank and following one of the newer charging protocols. > > Rick Brass > Imzadi C&C 38 mk 2 > la Belle Aurore C&C 25 mk1 > Washington, NC > > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bev > Parslow via CnC-List > Sent: Sunday, May 17, 2015 6:46 PM > To: cnc-list@cnc-list.com > Cc: Bev Parslow > Subject: Stus-List House/starting batteries. > > House/starting batteries > I have been in the habit of using battery one to start the 2gm diesel and > then using the same battery for a house battery. Then the next day battery > two to start the engine and then using that one as a house battery. This way > each battery is being used to start the engine and also recharge the > batteries. I have been told that this is incorrect. Am I correct or not? > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >
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