[C320-list] Simplified Starting Battery Schematic needed

[jonvez at comcast.net]

To charge both from the alternator I use a battery Combiner. when on shore power, both banks are charging regardless of the setting (Jeff helped my with my setup as well)...

regards,

Jon Vez

-------------- Original message -------------- 
From: John Van Vessem <jvanvessem at sbcglobal.net> 

> Jeff, 
> 
> I like your solution to a simple starting battery installation. It's 
> something I have wanted to do also. However, I'm questioning your instructions 
> on the use of this set up. You say that you must have the switch in the BOTH 
> position while charging either from the charger or from the alternator. I don't 
> get that because presently the switch position doesn't matter. I can have the 
> switch in position 1 or 2 and both 4d batteries will charge. Does your wiring 
> plan change that? 
> 
> John (Sojourn645) 
> 
> Jeff Hare wrote: 
> Hi Chris, 
> 
> Orlando's advise is wise here. You should invest in the 12v 
> bible or something 
> simple like it. Aside from that, the job is not complicated. For 
> any cables you need, 
> use only 1/0 or 2/0 pre-tinned boat cable. 
> 
> Re: this wiring 
> diagram: http://www.catalina320.com/gallery/album31/MinimalStartingBattery 
> 
> This is one of the simplest functional arrangements you'll probably find. 
> 
> First step: Parallel the 4Ds 
> ==================== 
> The negative terminals of both 4Ds are already connected together 
> with heavy black cable and 
> they form the common DC ground. That part is all set. 
> 
> To put the two 4Ds in parallel without adding any new wire, you 
> can simply move the battery 
> cable connected to the #1 (or A) terminal of the 1-2-both, over to 
> the #2 (or B) terminal of that 
> switch. I strongly recommend cleaning the connectors lightly with 
> steel wool before reattaching 
> them, especially if they're not pre-tinned connectors. 
> 
> Step two: Install a starting battery 
> ========================= 
> Put it as close to the 1-2-Both switch as practical and 
> relatively close to one of the two 4Ds. 
> I'm guessing that you're battery 1-2-both switch is on the electrical panel. 
> 
> Using heavy black cable, connect the Negative starting battery 
> terminal to the Negative post on the nearest 4D. 
> 
> Using a heavy Red Cable, connect the Positive starting battery 
> terminal to the #1 (or A) terminal of the 1-2-both switch. 
> 
> That's it... Now, how do you use it? 
> ============================== 
> 
> Generally speaking, you leave the battery switch on both whenever 
> motoring, or at the dock plugged-in to shore power. On the hook, 
> using battery power, ALWAYS switch over to position #2 to disconnect 
> the starting battery. 
> 
> The engine will start in position #1 using the Starting battery or 
> position #2 using the house batteries, or all batteries in the Both position. 
> 
> You don't need to do anything with the alternator wiring. 
> 
> The shore power will only recharge the starting battery when the 
> 1-2-both is in BOTH position. 
> 
> Cheers! 
> -JeffH 
> 
> 
> 
> 
> At 01:05 PM 1/8/2006, you wrote: 
> >Although there is much information on the site and archives for 
> >installing a starting battery, I was hoping to get some help on a 
> >simpler design. 
> > 
> >I have hull #139 with a 4D battery under each settee, one on STBD 
> >and one on PORT. 
> > 
> >I've purchased a separate on/off switch from Blue Sea, a negative 
> >distribution bus, and I intend to buy a group 24 battery and the 
> >necessary extra cables and wires. 
> > 
> >I do not intend to install a monitor. 
> > 
> >I only motor in and out of the slip (15mins) and I plug in every 
> >night all night. 
> > 
> >I leave the fridge running all the time if stocked with beer, etc. 
> > 
> >I use the boat (race and cruise) all year long, and visit the boat 
> >at least 2X per week (10mins from house). 
> > 
> >Can someone draw out the simplified wiring diagram? Alternatively, 
> >if someone can talk in terms of "take the wire that was here and 
> >move it here and add a wire here....etc" that would be appreciated. 
> > 
> >Using Jeff's diagram as a guide, where do the wires from the 
> >alternator tie into? 
> > 
> >Do I need a fuse, solenoid, combiner, isolator for this simple 
> >design? What are the risks of not having any of these? 
> > 
> >Thanks in advance, and I will be happy to post a follow up story 
> >with pictures upon completion of the project. 
> > 
> >Chris 
> >Amore #139 
> > 
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> 
> 
> 
> John Van Vessem 
> Sojourn 645 
> Vallejo Yacht Club 
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