Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 21-06-2014, 07:13   #1
Registered User

Join Date: May 2011
Boat: Hitchhiker, Catamaran, 40'
Posts: 354
storing batteries, charger set points

I am preparing to leave the boat for five months in a hot place. I have two new L-16 Trojans (420 AH), an Outback flexmax 60 and 380 watts of solar. I currently have it set up to absorb for one hour per day at 14.5 volts and float at 13.5 volts. I won't be running any loads on the system while I am away. Is it better to:
1. Leave it the way it is but have someone check the water level in a few months ?
2. Lower the absorb time or voltage or both ?
3. Equalize the batteries then shut the system down ?

suggestions?
__________________

__________________
Thumbs Up is offline   Reply With Quote
Old 24-06-2014, 08:43   #2
Moderator Emeritus
 
Ex-Calif's Avatar

Cruisers Forum Supporter

Join Date: May 2007
Location: Singapore
Boat: Maxi 77 - Relax Lah!
Posts: 11,514
Images: 4
Re: storing batteries, charger set points

I would consider looking for threads about "removing my batteries for winter"

Betteries will discharge all on their own. Smarter guys than me will jump in but I don't see the utility of leaving the system "going" and having the batteries cycle.

I think removing batteries for storage goes something like this

- Fully charge them
- Store them on wood blocks/strips to isolate them

- when you return it's basically top off the water and run a charge cycle.
__________________

__________________
Relax Lah! is For Sale <--- Click
Click--> Custom CF Google Search or CF Rules
You're gonna need a bigger boat... - Martin Brody
Ex-Calif is offline   Reply With Quote
Old 24-06-2014, 08:58   #3
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 4,321
Re: storing batteries, charger set points

If it was gels or AGM, I've had better luck disconnecting the batteries at the terminals.

For FLA, I'd keep it floating with no absorption. Depends on how hot hot is, but probably 13.2v if the battery is going to see 90 degrees or above. If the batteries are new, I see no need to equalize them.
__________________
donradcliffe is offline   Reply With Quote
Old 24-06-2014, 09:32   #4
Nearly an old salt
 
goboatingnow's Avatar

Cruisers Forum Supporter

Join Date: Jun 2009
Posts: 13,649
Images: 3
Re: storing batteries, charger set points

why are you subjecting the bank to repeated absorption cycles ?



Put the battery charger on a simple AC plug in timer , have it come on once per week for a few hours.

Ive left all my batteries like that for 6 months every year for years now.

Top up with water, at the start, generally they don't need topping up again till start of season

dave
__________________
Check out my new blog on smart boat technology, networking and gadgets for the connected sailor! - http://smartboats.tumblr.com
goboatingnow is offline   Reply With Quote
Old 24-06-2014, 09:40   #5
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
Re: storing batteries, charger set points

When we leave our boat for any time, I lower the absorption voltage to 14.1V and go away. We leave our reefer running - if we didn't, I would just set the controller to float.

Mark
__________________
www.svreach.com

You do not need a parachute to skydive. You only need a parachute to skydive twice.
colemj is offline   Reply With Quote
Reply

Tags
charger

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Last Set of Batteries Using More Water Wainui Marine Electronics 4 09-08-2011 12:53
For Sale: Six Marine Batteries - 4-85Ah Matched Set, Located in Sydney, Australia CaptStarboard Classifieds Archive 4 02-11-2010 01:11
Second Set of Reef Points...in Normal Spot, or Deeper ? OrangeCrush Monohull Sailboats 2 03-05-2010 11:19
AC charger smarter than the 3 stage "smart" charger? CSY Man Electrical: Batteries, Generators & Solar 64 30-09-2006 13:49



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 14:41.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.