Should I be concerned about the house battery - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 13 Old 10-12-2010 Thread Starter
Senior Member
 
LakePirate's Avatar
 
Join Date: May 2008
Location: Cedar Mills Marina
Posts: 128
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 8
 
Should I be concerned about the house battery

Both batteries (a group 24 starter and 27 house) showed 100% charge on the meter before leaving the dock. After only about an hour and half of sailing with only the gauges on I went to start the motor with the switch on just the house battery and nothing. Ran down and switched to all and it fired right up. I know the group 27 isn't designed to be a starter battery but figured it would have enough to at least spin the motor a little. My question is since it didn't do anything should I be considering replacing the batteries?

When a Woman says - Go Ahead: This is a dare, not permission. Don't Do It!
LakePirate is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 13 Old 10-12-2010
Senior Member
 
night0wl's Avatar
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,459
Thanks: 0
Thanked 21 Times in 21 Posts
Rep Power: 10
 
How much amperage does your starter draw to turn the engine over? Realistically, that size battery bank should have enough juice to do the deed...really, the type of battery form factor (a Group 24 or Group 27) isn't salient to the discussion.

The TYPE of battery, however, is. Are these Group 24 or Group 27 starting batteries....flooded deep cycle....AGMs....? How do you keep them charged when not in use? Also - a simple battery load test will reveal if the batteries are any good. I've had many batteries show strong voltage (12.8+ Volts) only to just fall to 10 V and lower (discharged) when the slightest load is put on them. That just means the battery is shot.

More info would be useful to diagnose your battery issue. But at a minimum, I would recommend a battery load test. Most auto repair stores will do this for you.

S/V Jendai
Beneteau 343
night0wl is offline  
Quote Quick Reply Share with Facebook
post #3 of 13 Old 10-12-2010 Thread Starter
Senior Member
 
LakePirate's Avatar
 
Join Date: May 2008
Location: Cedar Mills Marina
Posts: 128
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 8
 
The 24 is a starter and the 27 is a deep cycle. I didn't have a volt meter with me but I'm guessing since the batteries are 3 years old it's time to replace.

When a Woman says - Go Ahead: This is a dare, not permission. Don't Do It!
LakePirate is offline  
Quote Quick Reply Share with Facebook
post #4 of 13 Old 10-12-2010
Senior Member
 
Gene T's Avatar
 
Join Date: May 2006
Location: Left Coast USA
Posts: 666
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Have you checked the electrolite level?

Gene


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

Currently in Long Beach, CA
Gene T is offline  
Quote Quick Reply Share with Facebook
post #5 of 13 Old 10-12-2010
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,499
Thanks: 0
Thanked 96 Times in 87 Posts
Rep Power: 8
   
You should be able to start a small gas or diesel engine (under 40 hp or so) with any group 27 battery in good condition. Even a deep cycle battery.

3 years isn't long for batteries if charged properly.

You say they showed 100% charged by the meter. What kind of meter?

Also if one battery is dead best to switch to the other battery, not to both. Combining a good with a dead battery can drain the good battery.

It sounds like the battery might be shot.

Brian
Living aboard in Victoria Harbour
mitiempo is online now  
Quote Quick Reply Share with Facebook
post #6 of 13 Old 10-12-2010
Irrationally Exuberant
 
Join Date: Jul 2007
Location: Northern Virginia
Posts: 1,332
Thanks: 9
Thanked 6 Times in 6 Posts
Rep Power: 9
 
I would guess that your meter is a volt meter. Batts can show 100% (or close to it) in terms of volts while being fairly dead in terms of capacity--as nightowl said.

Tom K

2000 Beneteau 331
Northern Chesapeake Bay

Ambition is a poor excuse for not having enough sense to be lazy ~ Steven Wright
arf145 is offline  
Quote Quick Reply Share with Facebook
post #7 of 13 Old 10-12-2010
Old Fart
 
DwayneSpeer's Avatar
 
Join Date: Oct 2003
Location: Pasco, WA, USA
Posts: 514
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
 
A volt meter will not tell you much of anything in terms of how good the battery is, just that it's charged.


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


Hey, can one of you guys pass me a crab?


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
DwayneSpeer is offline  
Quote Quick Reply Share with Facebook
post #8 of 13 Old 10-12-2010
Senior Member
 
Join Date: Jul 2007
Posts: 407
Thanks: 0
Thanked 5 Times in 4 Posts
Rep Power: 9
 
House vs starter battery

LakePirate,
It may also depend on how the boat is wired. I have 4 house batteries but I cannot start the engine from them I have to either use the starter battery or have them all on both.

CapnRon47 is offline  
Quote Quick Reply Share with Facebook
post #9 of 13 Old 10-12-2010
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,499
Thanks: 0
Thanked 96 Times in 87 Posts
Rep Power: 8
   
CapnRon
That makes no sense. If "both" selects the house batteries they must be connected to the post the start battery is not connected to, either 1 or 2.

Brian
Living aboard in Victoria Harbour
mitiempo is online now  
Quote Quick Reply Share with Facebook
post #10 of 13 Old 10-13-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
What kind of meter are you using? IF it is just a voltmeter, it is USELESS for determining state of charge for the most part. For a voltmeter to give any reliable reading, the batteries have to be sit undisturbed, without loads or charging for a fairly significant period of time, usually 10+ hours, so that you're actually reading the true state of charge, rather than surface voltages from charging the batteries. A Hydrometer can show you the real SOC on a wetcell battery.

Do you have wet cell batteries? If so, when was the last time you checked the electrolyte levels in them. If the levels are low for any significant period of time, you can damage the plates and then the battery will lose significant amounts of capacity, although the voltage readings won't change much.

Also, how are you charging the batteries? Wet cell batteries like to be on a smart, three-stage charger. They also will self-discharge over time, faster with higher temperatures, so charging them on a regular basis is a good idea.

Quote:
Originally Posted by LakePirate View Post
Both batteries (a group 24 starter and 27 house) showed 100% charge on the meter before leaving the dock. After only about an hour and half of sailing with only the gauges on I went to start the motor with the switch on just the house battery and nothing. Ran down and switched to all and it fired right up. I know the group 27 isn't designed to be a starter battery but figured it would have enough to at least spin the motor a little. My question is since it didn't do anything should I be considering replacing the batteries?

Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply 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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
House Battery Selection ISLANDAH Gear & Maintenance 22 06-21-2007 10:12 PM
Best House Battery bob1956 Gear & Maintenance 3 04-19-2007 11:24 PM
Starting Battery vs. House Battery GarrettK Gear & Maintenance 18 10-26-2004 10:58 AM
Starter or House Battery? rrobar Gear & Maintenance 2 12-30-2003 03:56 PM
House battery capacity wwilson Gear & Maintenance 7 03-07-2001 08:06 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome