On Mar 27, 11:04 am, (Richard Casady)
wrote:
I seem to recall that for best battery life you should charge it at
the 20 hour rate. You have a 2000 AH starting battery? [Ten times the
size of the one on Cat's biggest bulldozer]. Charging a 25 AH battery
at the fifteen minute rate has to be a poor idea.

Sorry, I wasn't clear. The batteries absorption rate drops below the
alternators full output at about the 15 min mark if the batteries have
been deeply discharged. I dont' stop charging at that point, I just
stop asking as much from the alternators. These are AGMs and have
unusually high absorption rates. I do not use a separate starting and
house bank. I have a small reserve battery for emergency starting but
otherwise use a 2x8D Lifeline bank for all of my electrical needs.

-- Tom.