On Fri, 19 Aug 2011 15:31:19 -0700 (PDT), Tim
wrote:

Yo Tim,
Looks like you are planning to charge the deep cycles with your
alternator. It's probably going to take quite a bit of engine run time
to charge the deep cycles. Will your client be putting in enough engine
hours to do the job between uses of the trolling motor?

That's a good question and that's what I mentioned in the return email
to him. If simply going out for a couple miles, I didn't think it
would have a good recovery rate on ultra-low trolling batteries, but
his outboard motor alt. is rated for 65a. (so he says,- I don't know)
and on a short run it might be ok, but that's just a guess. after a
day of fishing, he might want to take it out and do a good run or so
to build the batteries back somewhat. OR, not trolling around till the
prop quits... LOL!

====================

In the long run he will need more recharge time. Probably some sort
of small generator or a large bank of solar cells is the right answer
if he doesn't have shore power available. A wind generator might work
also if he's in an area with good breezes.