Neil, Thanks for the explanation. I hadn't thought of the electronics issue, as my boat is pretty spartan. I monitor my depth sounder which has a voltage readout during starting, and have seen it drop below 11V, but it doesn't seem to mind, but other gear might. Since both my A-B switches are old, I might just consider this upgrade when I redo the electrical, as I do like the flexibility it offers, and we plan on adding Radar soon.
-- Shawn Wright shawngwri...@gmail.com S/V Callisto, 1974 C&C 35 https://www.facebook.com/SVCallisto On Mon, Nov 18, 2019 at 6:15 PM Neil Gallagher via CnC-List < cnc-list@cnc-list.com> wrote: > Shawn, > > This arrangement allows the use of a starting type battery, which can > deliver high current loads for short time but is not intended be drained > significantly, on the starting bank, and deep-cycle type which are > intended to drain down to much lower level over a longer time, on the house > bank. It would depend your use and on how often you recharge whether this > is important or not, to be sure. And there are now dual purpose batteries, > so it may be less of an issue if you use them. > > One other reason for this system is that it prevents the starting voltage > dip from shutting off your electronics on the house circuit, one of the > main reasons I chose this. > > Neil Gallagher > Weatherly, 35-1 > Glen Cove, NY > > On 11/18/2019 7:52 PM, Shawn Wright via CnC-List wrote: > > I can see why this is superior in isolating a battery/bank, but how often > is that necessary? Is this just to prevent the good batteries from being > drained by the bad one(s)? So if I had multiple house (or start) batteries, > I could just additional on/off switches linked to a house or start bus, and > a switch between the buses? Something to consider depending on how far I > get carried away with my electrical. Currently I have 2 banks, with room > for a 3rd, and just leave them combined all the time, as they are all 6V GC > batteries. If I'm concerned, I could isolate one bank in case the sun stays > away for too long (and we're not motoring at all), but so far that hasn't > happened. And so far, the only significant load we have is the fridge, with > minimal electronics. Once we add radar, that will change... > -- > Shawn Wright > shawngwri...@gmail.com > S/V Callisto, 1974 C&C 35 > https://www.facebook.com/SVCallisto > > > On Mon, Nov 18, 2019 at 1:56 PM Josh Muckley via CnC-List < > cnc-list@cnc-list.com> wrote: > >> I suggest changing to the linked setup. >> >> >> https://drive.google.com/file/d/1T4WnvplsWG_o9r6drc-FnhbTo0TJ4E_-/view?usp=drivesdk >> >> Take this opportunity to do away with the 1-ALL-2 switch. >> >> Josh Muckley >> S/V Sea Hawk >> 1989 C&C 37+ >> Solomons, MD >> >> On Mon, Nov 18, 2019, 1:13 PM Jeremy Ralph via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >>> Yesterday, my Blue Sea DC switch failed in a bad way — essentially the >>> plastic broke and the guts of the switch come apart causing a flaky >>> connection. Seems this is a common problem base on this forum: >>> >>> >>> https://www.thehulltruth.com/boating-forum/853223-blue-sea-battery-switch-failure.html >>> >>> I emailed Blue Sea and await their response. >>> >>> Four years ago I replaced the original old Perko switch when I did a >>> battery upgrade/rewire/shunt+monitor. Now I’m worried about simply >>> replacing with the same one if it’s prone to failure. >>> >>> Luckily this happened at the dock but it could have been really bad if >>> I’d needed power in a hurry. >>> >>> I’m now thinking I’ll wire up a “backup” bypass directly to the starter >>> in case this happens again or for jump starting, etc. >>> >>> Any thoughts on this from the collective wisdoms of this list? >>> >>> Thanks, >>> Jeremy >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>> >>> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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