Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 07-12-2015, 16:05   #1
Registered User

Join Date: Oct 2011
Location: Canada
Boat: CT 56
Posts: 418
Images: 3
Send a message via Skype™ to undercutter
Equalizing T-105's

Recently attempting to equalize 900ah house bank due to performance loss discovered that in fact the MassCombi unit had been set on Gel/Spiral which prevents equalization function from operating. Don.t know hhow this happened however after setting in correct position equalized batteries until automatic timeout function shut off this charging mode. Maximum 14.96v attained with all loads disconnected from batteries after 6 hrs.

Questions;

Is this charge sufficient to equalize the batteries?

Is there any tests that can be performed to determine the condition of the batteries? Will Specific Gravity readings give a good indication in a full charge state? If so what should these readings be?

Although fitted with both DC and AC driven fridge compressors, the AC fridges run so much less and cool so much quicker that we run the AC fridges off the 4000w inverter from the batteries. However this draws a huge load on startup and we would like to install a smart start on these fridges. The fridges are Seafrost and the smartstart available is a Dometic. Can anyone provide a wiring diagram for this installation?
__________________

__________________
undercutter is offline   Reply With Quote
Old 07-12-2015, 19:32   #2
Registered User

Join Date: Jun 2013
Location: canada
Posts: 1,694
Re: Equalizing T-105's

with a bank that big I'd probably equalize batteries separatly. this also allows you you keep powering the boat off the others.
__________________

__________________
smac999 is online now   Reply With Quote
Old 08-12-2015, 06:30   #3
Registered User

Join Date: Oct 2011
Location: Canada
Boat: CT 56
Posts: 418
Images: 3
Send a message via Skype™ to undercutter
Re: Equalizing T-105's

Quote:
Originally Posted by smac999 View Post
with a bank that big I'd probably equalize batteries separatly. this also allows you you keep powering the boat off the others.
Are you saying this because this 900ah battery bank cannot be effectively equalized due to the limited current of the charge (6 amps) or just because it may be convenient to keep some of the systems running while equalizing?

To do this I would have to purchase a separate charger with equalizing capacity and as I am in Oz this would probably be exorbitant as the last time I was in a repco even a simple trickle charger was around $100.00AU. Might be nice to have a back up though in case the Mastervolt ever failed. You know we love to have redundancies.
__________________
undercutter is offline   Reply With Quote
Old 08-12-2015, 10:03   #4
Registered User
 
zboss's Avatar

Join Date: Sep 2011
Location: On a boat
Boat: Cabo Rico 38
Posts: 3,426
Re: Equalizing T-105's

I think what he is saying is that you are probably better off equalizing each battery separately using a small charger that you can set to the voltage required for equalization. I have no idea if that is accurate. However...

You may be able to find such a charger at an automative store. They are relatively inexpensive but you need to be able to set the actual voltage - a simple equalization setting is not good enough since the Trojans have much higher equalization voltages than other batteries and the default voltage may not be what you need. Also I think the 105's are 6 volt.

You would need to disconnect each battery from the bank, set the charger to the correct voltage for equalizing and then watch for the specific gravity to stop changing.

You can probably take them to a car garage to get it done.
__________________
zboss is offline   Reply With Quote
Reply

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
Equalizing Batteries with Alternator Only (No Battery Charger) tomj Electrical: Batteries, Generators & Solar 5 16-11-2010 20:15
Victron Charger and Equalizing? SoonerSailor Electrical: Batteries, Generators & Solar 9 10-02-2010 10:37
Equalizing AGM Batteries boat_alexandra Electrical: Batteries, Generators & Solar 6 05-12-2009 14:13
Equalizing Batteries mestrezat Electrical: Batteries, Generators & Solar 2 12-11-2009 21:23
Equalizing AGMs theonecalledtom Electrical: Batteries, Generators & Solar 16 15-03-2009 05:46



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:35.


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.