Originally Posted by Cheechako
Hmmmm....You might be motoring 20 minutes or you might be motoring 12 hours....If 10 gage wire doesnt work for this ... why not? As I mentioned earlier.. it does work for travel trailers.
Just trying to figure out what's wrong with this thinking...?
Travel Trailers would tend to motor
long enough to charge the battery, and then at the end of the day most might plug
back into a power socket. A boat might just motor
on and off their mooring
and anchor for two days, then 20 minutes of charging
is not going to do much good as the volt drop along the cable will be so great they will never get a proper charge. Motor for 20 hours and they may get fully charged, but batteries like to be charged at their correct voltage to help stir up the electrolyte and stop stratification - not just put Ah back into the battery - that's what is wrong with your thinking.
My reference to a friend and his problem was because his windlass battery never charged up properly and finally the solenoid contacts failed and the windlass stopped working because of the chatter caused by a low battery voltage. He had a 10 gauge wired from his house bank to his windlass. QED.