Name:   Shortbus - Subject:   Battery Switch?? Date:   5/30/2014 1:25:07 PM

My use for two batteries is one for stereo one for start.

If the stereo runs down a battery, the boat will still start.

So, when the motor is running  switch to both to charge both.

If you float a long time with lights and stereo, switch to your deep cycle.

Best setup is a continuous duty solenoid to 1)connect the positives together when the key is turned on to charge   and 2)seperate the batteries when the key is off.

My start battery is 8 years old.  Two batteries give a good kick even when old.