replacing starting battery - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Chat  
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
 Not a Member? 


Like Tree1Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 06-04-2014
nodders's Avatar
Senior Member
 
Join Date: Aug 2011
Location: toronto, Ontario
Posts: 135
Thanks: 0
Thanked 5 Times in 3 Posts
Rep Power: 4
nodders is on a distinguished road
replacing starting battery

I have a 28 ft boat with two batteries. We do some extended cruising but limit the power we use at anchor considerably. I often will hoist a led light to the masthead at night rather than use the anchor light.

The deep cell house battery seems fine, but the starter battery is not taking a charge very well, although it has enough juice for now to get the motor going (Yanmar 2GM).

Should I go for a starter battery or could I use another deep cell?
__________________
I am not really from Toronto


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 06-04-2014
Alex W's Avatar
no longer reading SailNet
 
Join Date: Oct 2012
Posts: 2,309
Thanks: 2
Thanked 139 Times in 133 Posts
Rep Power: 3
Alex W is on a distinguished road
Re: replacing starting battery

First thing: switch the anchor light out to a LED. A 1-2W LED (typical anchor light) will run for days and days on a group 24 battery.

I just switched from a high CCA starter battery to using my pair of house batteries to start the engine. It works fine on my Yanmar 2GM20F. I have a small backup 3rd battery as my emergency battery should the house batteries get run all the way down. That one is never used for anything else. It's small size (U1 form factor) made it easy to fit into my 28' boat.
__________________
I'm no longer participating on SailNet.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 06-04-2014
deniseO30's Avatar
1934 Chickering
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,498
Thanks: 53
Thanked 105 Times in 94 Posts
Rep Power: 10
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
Re: replacing starting battery

Before you buy.. just a suggestion, take each battery and have them load tested. they need to be charged for a good reading. Seems to me one house battery can handle the needs overnight.
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My boat is for sale.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 06-04-2014
eherlihy's Avatar
Learning the HARD way...
 
Join Date: Jan 2007
Location: Boston / Ft Myers Area
Posts: 3,747
Thanks: 132
Thanked 82 Times in 79 Posts
Rep Power: 9
eherlihy will become famous soon enough
Re: replacing starting battery

I faced the same decision last year. Like you, I use an LED anchor light which I raise in the rigging, rather than the all around white light at the top of the mast. The LED light shines softly on the boat to make it more visible, and meets the CFR for an anchor light.

My boat had two group 27 batteries; one 10 years old, and the other 7 years old. I replaced them with two group 29 batteries (105 AH), and use one for the house, and the other for the start. I can use either as a start, or house. A marine deep cycle battery works fine for starting a diesel.

Someday, I will combine these two batteries, move them to another location, and add a small, cheap, start battery.
christian.hess likes this.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

USCG Licensed OUPV Captain, ASA 101/103/104/105 Certified Instructor - Also certified in Recreational Marine Electrical Systems
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 06-06-2014
christian.hess's Avatar
"Nubile Southern Sailor"
 
Join Date: Sep 2013
Location: Columbus, Ga
Posts: 4,498
Thanks: 178
Thanked 180 Times in 176 Posts
Rep Power: 2
christian.hess is on a distinguished road
Re: replacing starting battery

or you can just buy a cheap high cca truck battery for now

Im not a fan of pairing an old battery with a new one unless its like 6 months old or something rather have a new bank or maintain an older one
__________________
Islander 36 now FOR SALE!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by christian.hess; 06-06-2014 at 11:39 AM.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 06-06-2014
hellosailor's Avatar
I've mislaid my Kraken!
 
Join Date: Apr 2006
Posts: 11,082
Thanks: 3
Thanked 110 Times in 107 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: replacing starting battery

Starting a small diesel isn't a big deal, any full size deep cycle battery will be able to handle it. So I'd say have them both load tested. Replace one or both as needed, with deep cycle battery(s). And try not to cringe at the price of replacing lights (all of them) with LEDs, because LEDs pay for themselves with all the power they save.
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 06-11-2014
JimsCAL's Avatar
Senior Member
 
Join Date: May 2007
Location: Glen Cove, NY
Posts: 2,528
Thanks: 2
Thanked 47 Times in 43 Posts
Rep Power: 8
JimsCAL is on a distinguished road
Re: replacing starting battery

On a smaller boat like yours, I would just go with another deep cycle. It will start the diesel just fine and will survive occasional discharges much better.
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 06-11-2014
Stu Jackson's Avatar
Senior Member
 
Join Date: Jul 2001
Posts: 824
Thanks: 0
Thanked 10 Times in 9 Posts
Rep Power: 14
Stu Jackson is on a distinguished road
Re: replacing starting battery

Quote:
Originally Posted by eherlihy View Post
I faced the same decision last year. Like you, I use an LED anchor light which I raise in the rigging, rather than the all around white light at the top of the mast. The LED light shines softly on the boat to make it more visible, and meets the CFR for an anchor light.

My boat had two group 27 batteries; one 10 years old, and the other 7 years old. I replaced them with two group 29 batteries (105 AH), and use one for the house, and the other for the start. I can use either as a start, or house. A marine deep cycle battery works fine for starting a diesel.

Someday, I will combine these two batteries, move them to another location, and add a small, cheap, start battery.
eh's description is a classic example of the evolution of boating electrical support systems.

2 separate banks (a bank being a single to any multiple of batteries) was the older style. The currently preferred arrangement is as large a house bank as possible with a separate either start or reserve smaller bank. Reasons are explained in Charlie's book.
__________________
Stu Jackson, C34, 1986, M25 engine, Rocna 10 (22#)
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 07-08-2014
MedSailor's Avatar
Closet Powerboater
 
Join Date: Mar 2008
Location: Anacortes PNW
Posts: 3,152
Thanks: 173
Thanked 92 Times in 82 Posts
Rep Power: 7
MedSailor is on a distinguished road
Re: replacing starting battery

Quote:
Originally Posted by JimsCAL View Post
On a smaller boat like yours, I would just go with another deep cycle. It will start the diesel just fine and will survive occasional discharges much better.
This has always been my thinking, but I doubt myself sometimes. So, to be clear using a deep cycle battery for starting is NOT going to damage it, or shorten it's life?

I just replaced my G-29 starting battery with a deep cycle that is rated for higher CCAs and MCAs. Go figure....

MedSailor
__________________
I have a sauna on my boat, therefore I win.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 07-08-2014
hellosailor's Avatar
I've mislaid my Kraken!
 
Join Date: Apr 2006
Posts: 11,082
Thanks: 3
Thanked 110 Times in 107 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: replacing starting battery

"So, to be clear using a deep cycle battery for starting is NOT going to damage it, or shorten it's life? "

How long is your piece of string?

IF the impulse load for the starter is less than the maximum impulse load the battery can supply there will be no damage. If the battery is too small, and you grind the starter too long, you'll melt the plates.

With a conventional 1.5kW or 2.5kW starter and a Group27 or Group 31 or larger battery...check with the manufacturer, there is probably no problem. You want certain? Check with the manufacturer.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
How big of a starting battery do I really need? Rusty123 Electrical Systems 7 12-23-2013 08:25 PM
Battery 1 not starting engine andrewoliv Electrical Systems 7 09-26-2011 09:53 AM
Starting Battery Setup. 1970Columbia34 Gear & Maintenance 19 02-24-2009 09:33 PM
Starting battery Alden68 Gear & Maintenance 25 04-12-2007 01:24 AM
Starting Battery vs. House Battery GarrettK Gear & Maintenance 18 10-26-2004 11:58 AM


All times are GMT -4. The time now is 07:44 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.