I just dealt with this issue this summer, and wound up using this approach:
https://www.bluesea.com/products/7650/Add-A-Battery_Kit_-_120A
The switch actually has three positions, Off, On and Combine. In On,
the house and starting circuits are isolated, in Combine they are
connected. It appears to accomplish almost the same as the 3 on/off
switches, but it would not let you turn one battery "off" and power both
circuits with a single battery. You'd have to disconnect the battery
lead. On the other hand, less wiring and fewer switches.
Neil Gallagher
Weatherly, 35-1
Glen Cove, NY
On 11/18/2019 6:11 PM, Josh Muckley via CnC-List wrote:
3 switches actually allow more flexibility if you need to start the
engine with the house battery or power the house with the start
battery. They are also cheaper...and when/if one breaks you don't
have an entire system failure to deal with.
FWIW, That switch setup is referenced in a book by Don Casey.
Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
On Mon, Nov 18, 2019, 4:50 PM Jeremy Ralph via CnC-List
<cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote:
Thanks all for the responses.
Yeah ,I should really call but less chance of me getting angrier
with an email. Redoing this stuff is a major PITA as you all know
and I’ve lost some trust in all the Blue Sea stuff I spent a
bundle on
RE: do away with the 1-2-all switch in place of 3 switches. I do
have an ACR (that came with the blue sea switch). The switch can
then do ON, force combine, off. What’s the benefit of having 3
switches? Different combinations of house, start, combine on/off?
Thanks,
Jeremy
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