Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-12-2009, 22:29   #1
Registered User
 
Ti' Punch's Avatar

Join Date: Mar 2009
Location: Hampton Roads, VA
Boat: Fountaine Pajot, Antigua 37 - Ti' Punch
Posts: 155
Mismatched Battery Question

I've got a question on mismatched battery types. I think I'm okay here, but being a mechanical type, I'd like a second opinion on things electrical. First, some background. I've got a catamaran with two batteries in each hull. On each side there is one battery marked "Engine/Starting" and one marked "House". The house batteries are controlled by a standard "1-2-Both" switch near my breaker panel and hooked up to a battery charger as well as the alternators. The engine/starting batteries appear to just be connected to the alternators, not the charger. On both sides, the negative terminals of the house and engine batteries are connected, but the positives are not. The batteries are all wet cells, but there is a mix of Group 31 and Group 27 batteries. On the Port side, the Engine battery is a Group 31 Deep Cycle/Starting model, and the house battery is a Group 27 Deep Cycle. On the Starboard side I've got two Group 31's. The house battery is a Deep Cycle, and the Engine battery is a Deep Cycle/Starting mix. All 4 batteries appear to be from different manufacturers and vintages. When we bought the boat 2 yrs ago the surveyor recommended replacing them all, but they have been fine up till now. Finally though, the Port Engine/Starting battery has completely given up the ghost. I would like to replace all of them now, but am thinking I should go with dedicated Starting type batteries for the Engine/Start units and dedicated Deep Cycles for the House batteries. My question is, is there any harm in using Group 27 Starting batteries for the Engine/Start units and Group 31 Deep Cycles for the House batteries? Each battery appears to go through its own isolator, so I don't think there would be an issue, but wanted to check with you all. Sorry for the long winded post.

Chris
__________________
Ti' Punch is offline   Reply With Quote
Old 10-12-2009, 22:48   #2
Registered User
 
Stillraining's Avatar

Join Date: Oct 2008
Location: Puget Sound
Boat: Irwin 41 CC Ketch
Posts: 2,876
No you will be fine
__________________
"Go simple, go large!".

Relationships are everything to me...everything else in life is just a tool to enhance them.
Stillraining is offline   Reply With Quote
Old 11-12-2009, 05:28   #3
Registered User
 
Ti' Punch's Avatar

Join Date: Mar 2009
Location: Hampton Roads, VA
Boat: Fountaine Pajot, Antigua 37 - Ti' Punch
Posts: 155
Thanks!

That's good news. Thanks for the reply!
__________________
Ti' Punch is offline   Reply With Quote
Reply

Tags
battery

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
Another Battery Question JusDreaming Electrical: Batteries, Generators & Solar 7 14-11-2009 06:03
Battery Question CAELESTIS Electrical: Batteries, Generators & Solar 1 19-04-2009 09:52
another battery question motion30 Electrical: Batteries, Generators & Solar 3 09-03-2009 18:11
Battery Question JusDreaming Construction, Maintenance & Refit 2 28-01-2009 08:15
Battery Question Ativa Electrical: Batteries, Generators & Solar 37 21-05-2007 09:30



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 16:57.


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.