" JimH" not telling you @ pffftt.com wrote in
:

A word of caution to Charles....unless you are sure your battery
switch is ignition protected NEVER switch between batteries when the
engine is running.



That's not the problem. NEVER SWITCH THE SWITCH WHEN THE ENGINE IS RUNNING
to protect the electronics, in the engine and out! The switch opens
between posts, allowing the alternator's HIGH VOLTAGE PULSES normally
absorbed by the battery charging to put over 20V pulses on your expensive
equipment!

BOTH is just like a set of jumper cables in a car. Unless the house
battery is really discharged too far, go from house battery to BOTH, not 1
so you can recharge both starting and house batteries on the way home....a
headstart for the AC charger to complete the long trickle.

By the way, unless the ride home is 10 hours long, you'll NEVER recharge
the house batteries in just 30 minutes to the boatramp. Batteries charge
slowly. Capacitors charge quickly.... Connect 2-6A automatic shutoff
charger to them when you get home or at your slip. NO Battery recharges at
30A for 30 minutes....just not possible.

Larry
--
Halloween candy left over.....
Is there a downside?