I have 3 batteries on my 16' boat. 1 is the starting battery, and runs the
lights and what not when the engine isnt runing. The engine is a 2001 70 hp
johnson. The other 2 batteries are hooked up in series to run the 24v
trolling motor. Is there a way to hook up all three to charge off the
engine? Or is this a pipe dream?

While technically possible to wire this, in practical terms it's a no-go.
The alternator doesn't produce enough power to charge 3 batteries.
BTW: I use an XPS 5/5/5 onboard charger I got from BPS at a good price.
"Fat Bass" wrote in message
news:3f17f002$1@shknews01...
I have 3 batteries on my 16' boat. 1 is the starting battery, and runs the
lights and what not when the engine isnt runing. The engine is a 2001 70
hp
johnson. The other 2 batteries are hooked up in series to run the 24v
trolling motor. Is there a way to hook up all three to charge off the
engine? Or is this a pipe dream?

i have a guest from basspro 10 amp 2 battery charger when the boat sits...


"John Wentworth" wrote in message
et...
While technically possible to wire this, in practical terms it's a no-go.
The alternator doesn't produce enough power to charge 3 batteries.
BTW: I use an XPS 5/5/5 onboard charger I got from BPS at a good price.
"Fat Bass" wrote in message
news:3f17f002$1@shknews01...
I have 3 batteries on my 16' boat. 1 is the starting battery, and runs
the
lights and what not when the engine isnt runing. The engine is a 2001 70
hp
johnson. The other 2 batteries are hooked up in series to run the 24v
trolling motor. Is there a way to hook up all three to charge off the
engine? Or is this a pipe dream?

Yes, but is it worthwhile? Depends on the alternator output from the motor.
Easiest way is to wire a 12 Volt connector plug where you could plug either
trolling motor battery into the connector.
Bill

"Fat Bass" wrote in message
news:3f17f002$1@shknews01...
I have 3 batteries on my 16' boat. 1 is the starting battery, and runs the
lights and what not when the engine isnt runing. The engine is a 2001 70
hp
johnson. The other 2 batteries are hooked up in series to run the 24v
trolling motor. Is there a way to hook up all three to charge off the
engine? Or is this a pipe dream?

you can get DC-DC convertors that will do 12 to 24

"noah" wrote in message
...
On Fri, 18 Jul 2003 09:01:54 -0400, "Fat Bass"
wrote:

I have 3 batteries on my 16' boat. 1 is the starting battery, and runs
the
lights and what not when the engine isnt runing. The engine is a 2001 70
hp
johnson. The other 2 batteries are hooked up in series to run the 24v
trolling motor. Is there a way to hook up all three to charge off the
engine? Or is this a pipe dream?


Battery isolators are a nifty gadget allowing the charging of multiple
batteries, while isolating the loads placed on the batteries. The
problem that I think you have is the paired series batteries. I don't
know if they make combiners, or isolators, that will allow you to
charge them individually at 12v, and you're not going to get 24v. out
of your engine system without modification.

I would try West Marine, and Bass Pro Shops (both online), to see if
some genius EE came up with a solution. There is also a newsgroup
rec.outdoors.fishing.bass which is populated by die-hard fishermen who
have tweaked their boats to the max.
Good luck,
noah

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