Dead start battery...

[malyea]

Originally Posted by billknny

My boat has a single (12V) start battery, and eight Group 31 batteries that make up the 24 volt house bank. There are NO connections between the two systems at all--switched or not.

My setup is basically the same....start battery isolated from house bank via two single circuit battery switches (ON - OFF only) that both feed a Blue Sea 7610 SI-ACR to “combine” for charging but isolate for use.

Have jumper cables but considering upgrading from the current setup to one without jumper cables (damn, where did I put them...).

I generally prefer the simplest system to do the job...automatic ACR switching, 1-2-BOTH combiner switch or the momentary switch...pros and cons of each?

[svHyLyte]

Because of the amperage a house/start battery bank connection may require to actually start the engine, we chose to make the connection through a solenoid activated by a relatively lighter weight Blue Seas momentary switch. It makes the wiring much more simple both for the switch itself and for the connection between the batteries.


FWIW...

[john61ct]

As long as the solenoid (actual contactor) is rated for high transient amps.

If using the ML ACR then that functionality is built in.

[guyrj33]

1 2 Both switch.