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Author Topic:   Winter charging of two batteries
Royboy posted 11-19-2006 09:30 PM ET (US)   Profile for Royboy   Send Email to Royboy  
Do I need anything special to maintain a charge on my batteries during the Winter? I removed them from the boat, and I have a charger that has an auto function to trickle charge once a full charge is reached. Do I just connect them in parallel with short appropriate guage cables?


alfa posted 11-20-2006 01:47 AM ET (US)     Profile for alfa  Send Email to alfa     

I bought a Cristec charger 12V/25A.
It has 3 separate cables sets for max 3 batteries and is equipped with VSR. You can adjust each batteries charging current to match the battery type.

Chuck Tribolet posted 11-20-2006 09:53 AM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
Do not charge in parallel. You need separate charging
circuits for each battery (or just RELIGIOUSLY switch that
charger from one battery to the other every Sunday morning).


Buckda posted 11-20-2006 07:11 PM ET (US)     Profile for Buckda  Send Email to Buckda     
What Chuck said.

Roy - Swapping the charger becomes part of my Saturday morning routine in the winter. (Who knows why I'm too cheap to just buy a second trickle charger!). Every Saturday, I swap the charger to the other battery.

Now that I posted this, a second trickle charger has just made my Christmas list. Good gift idea for a cousin or something; plus it will be 5 more minutes I'll have free on my Saturday mornings!



ConB posted 11-20-2006 07:56 PM ET (US)     Profile for ConB  Send Email to ConB     
I only charge my batteries a couple times during the winter. I'm too old to change my ways now.
Royboy posted 11-20-2006 08:51 PM ET (US)     Profile for Royboy  Send Email to Royboy     
Dave, I've been an exceptionally good boy this year. No, really, ask anyone.

Seriously, aren't batteries connected in parallel when they're charging on a single circuit on the boat?


davej14 posted 11-20-2006 10:23 PM ET (US)     Profile for davej14  Send Email to davej14     
Depending upon the type of charger, you may not want to leave it connected full time. Even a trickle charger can overcharge and damage a battery if it allows the voltage to drift upwards. Charging a standard flooded cell battery once per month should be adequate.
jimh posted 11-20-2006 11:19 PM ET (US)     Profile for jimh  Send Email to jimh     
I added a permanently mounted on-board charger to my boat this year. As a result, I decided to leave the batteries in the boat over winter lay up. I plan to visit the boat periodically (at its indoor storage location) and plug the charger into a nearby 115-VAC wall outlet for an hour or two. I figure if I do this once a month I should be able to keep the batteries topped off all winter.
Bella con23 posted 11-20-2006 11:36 PM ET (US)     Profile for Bella con23  Send Email to Bella con23     
The permanently mounted charger is the solution to the problem I have been wrestling with for years.
It works for me in central Jersey where the winters are cold for months. I am lucky enough to have the boat stored on the side yard near a 110 outlet.
jechura posted 11-21-2006 12:25 PM ET (US)     Profile for jechura  Send Email to jechura     
I also mounted an onboard charger, Cabala's Pro Sport 8, 2 banks. My batteries are in the center console and they are not the easiest to remove and replace.


jechura posted 11-21-2006 12:30 PM ET (US)     Profile for jechura  Send Email to jechura
Backlash posted 11-23-2006 09:42 AM ET (US)     Profile for Backlash  Send Email to Backlash     
Ditto what Con said. I don't think it's necessary to trickle charge them all winter. I also think they prefer a nice dark basement for layover.


Chuck Tribolet posted 11-23-2006 12:10 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
A smart trickle charger will shut off. Both my boat and
my Corvette live on them. The last vette battery lasted like
10 years.


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