I have something similar. A switch for the house, a switch for engine, and a combine. See: https://dl.dropboxusercontent.com/u/15162917/ENTERPRISE/electrics.jpg <https://dl.dropboxusercontent.com/u/15162917/ENTERPRISE/electrics.jpg> (on the left side of the photo).
All the best, Edd Edd M. Schillay Starship Enterprise C&C 37+ | Sail No: NCC-1701-B City Island, NY Starship Enterprise's Captain's Log <http://enterpriseb.blogspot.com/> > On Mar 22, 2017, at 4:57 PM, Gary Russell via CnC-List > <[email protected]> wrote: > > Hi Josh, > I don't use a 1-all-2 battery switch. I hate them. I use a > Blue Sea Systems Dual Battery Bank Management Panel > http://www.defender.com/product.jsp?path=-1|328|2290000|2290006&id=151145 > <http://www.defender.com/product.jsp?path=-1|328|2290000|2290006&id=151145> > with an ACR. The Blue Sea Battery Panel has separate switches for both > banks and a switch to combine the batteries. > > Gary > > ~~~~~~~_/)~~~~~~ > > > On Wed, Mar 22, 2017 at 4:38 PM, Josh Muckley via CnC-List > <[email protected] <mailto:[email protected]>> wrote: > Gary, > > How do anticipate switching the house to start...and not having that option > in reverse? With the typical OEM 1,All,2 switches we're stuck with batteries > in parallel. With the Don Casey method either battery can be disconnected > and the loads cross-tied. > > I think I recall the reason for putting the house as primary. During the > bulk charge phase the ACR or echo-charge are disconnected which means that > the full charge current is applied to the primary battery. If you had a > larger house and a tiny start battery and your alternator or other charge > source was sized for the larger house capacity to minimize charge duration > then you would be able to exceed the max charge current of your start battery > (if it was setup as the primary) until it was up to 13 and the ACR closed in. > With a sufficiently large difference in size and a significantly discharged > house battery after the ACR closed in you could create a situation where the > start battery voltage would be pulled down enough to immediately reopen the > ACR. None of this is an issue in Bruce's case since both batteries are the > same size. He will also probably find that his alternator is attached to the > Off, 1,All,2 switch such that the alternator simply goes to whichever battery > is selected. > > Josh > > > On Wed, Mar 22, 2017, 3:46 PM Gary Russell via CnC-List > <[email protected] <mailto:[email protected]>> wrote: > Hi Josh, > I had read that the Primary battery should be the House battery but I > don't recall the article describing why. However, with the House battery as > primary, you can always switch to it to start the engine should the Start > battery fail. If the Start battery is Primary and fails, the ACR may not be > able to charge the House battery and you are out of options to start the > engine. > > Gary > S/V Kaylarah > '90 C&C 37+ > East Greenwich, RI, USA > > ~~~~~~~_/)~~~~~~ >
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