"Rick" wrote in message
...
I would suggest installing a battery combiner rather then the switch. Run
the 24 to start and the 27 as the house. Anytime the engine is running the
24 will charge first and then the 27.

If you really want a switch install a zap stop.

I had a switch and would forget to switch etc-etc just like everyone else
with a switch.

By the way if you switch off with the engine running the alternator diodes
will blow. That why the zap stop.




The switch is a Perko with alternator field disconnect. It is already
purchased.

What do you think of the need to use #1 gauge vs. #2 or #4 for a 10 foot run
from battery #2 to the switch? Chuck was estimating a demand of 250 amps
(for the starter) using the estimator found in this link:
http://www.ancorproducts.com/