Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 18-09-2011, 19:29   #1
Registered User

Join Date: Jul 2008
Location: New York, NY
Boat: Beneteau First 375
Posts: 78
Do I Need a New Battery Charger ?

My boat has been out of the water for a year. I've noticed recently that the battery bank 1 is quite low, it's normally charged by a small solar panel but that doesn't seem to be working. The solar panel feeds into a solar regulator with dual outputs to battery banks 1 and 2. Battery bank 2 was registering nearly 14 volts in the daylight today but I don't know why battery bank 1 isn't charging. Maybe the solar output for battery bank 1 shorted out, or maybe battery bank 1 is just too big--it's about 280 Amps, whereas battery bank 2 is perhaps 90 Amps.

So I thought I'd plug the boat in and charge it. There are no boat size outlets but I used an orange 100ft extension cord plugged into a regular household style outlet on one side, and with the help of an adapter, into the boat's 30A socket at the stern. When I flipped the switch on the permanently installed battery charger (I don't remember the make/model, probably the original one that came on my 1987 Beneteau), battery bank 1 came up to about 12.5 Volts from about 10.5 where it was in the morning. But it never went higher than 12.5V. Does that mean the charger is not working properly? Could the fact that I'm not giving the charger 30amps make it malfunction? (I think the adapter limits it to 15amps). Once I unplugged the boat after about 5 hours, the voltage immediately dropped to around 11.8V. Battery bank 1 contains two group 31 batteries that are each about 1 year old.
__________________
Joe500 is offline   Reply With Quote
Old 18-09-2011, 19:38   #2
Registered User
 
sailcruiser's Avatar

Join Date: Aug 2011
Boat: S2 11.0A 36'
Posts: 763
Quote:
Originally Posted by Joe500
My boat has been out of the water for a year. I've noticed recently that the battery bank 1 is quite low, it's normally charged by a small solar panel but that doesn't seem to be working. The solar panel feeds into a solar regulator with dual outputs to battery banks 1 and 2. Battery bank 2 was registering nearly 14 volts in the daylight today but I don't know why battery bank 1 isn't charging. Maybe the solar output for battery bank 1 shorted out, or maybe battery bank 1 is just too big--it's about 280 Amps, whereas battery bank 2 is perhaps 90 Amps.

So I thought I'd plug the boat in and charge it. There are no boat size outlets but I used an orange 100ft extension cord plugged into a regular household style outlet on one side, and with the help of an adapter, into the boat's 30A socket at the stern. When I flipped the switch on the permanently installed battery charger (I don't remember the make/model, probably the original one that came on my 1987 Beneteau), battery bank 1 came up to about 12.5 Volts from about 10.5 where it was in the morning. But it never went higher than 12.5V. Does that mean the charger is not working properly? Could the fact that I'm not giving the charger 30amps make it malfunction? (I think the adapter limits it to 15amps). Once I unplugged the boat after about 5 hours, the voltage immediately dropped to around 11.8V. Battery bank 1 contains two group 31 batteries that are each about 1 year old.
Assuming you've checked water etc. I'm struggling with this now myself. If your charger is like mine (proMariner New Pro 20 ferro resonant type) it will kill your batteries. Leaving it on will boil them from what I was told. My gut reaction to the new charger is yes. It sounds like there is more going on though. Fuses? regulator? There are some very knowledgeable folks that will get you going in the right direction. Check a thread I started on batteries for a lot of detail. I was told setting up 2 banks with primary charging going to house with an echo charger to the start bank.

Hope this helps. I'm pretty new too but reading a lot!
SC
__________________
sailcruiser is offline   Reply With Quote
Old 18-09-2011, 19:39   #3
Senior Cruiser
 
osirissail's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: A real life Zombie from FL
Boat: Gulfstar 53 - Osiris
Posts: 5,416
Images: 2
Re: Do I Need a New Battery Charger ?

Sounds like battery bank 1 is dead or dying. Try disconnecting the charger feed to battery bank 2 and see what the charger does. Or swap the feeds.
- - Also if you have multiple feeds off the battery charger - one feed to battery bank 1 and another feed to battery bank 2, you might have a bad or loose connection in the feed to battery bank 1.
__________________
osirissail 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
Battery Charger Blows GFCI idearat Electrical: Batteries, Generators & Solar 4 04-09-2011 23:21
Schumacher Battery Charger ? rhr1956 Electrical: Batteries, Generators & Solar 10 02-09-2011 15:39
Looking to Upgrade Battery Charger and Add Inverter Luken7 Electrical: Batteries, Generators & Solar 2 28-08-2011 19:55
Battery Testing Methods Dockhead Electrical: Batteries, Generators & Solar 12 28-08-2011 09:08
New Boat , Poor Battery Performance PhilDuhs Electrical: Batteries, Generators & Solar 16 08-07-2011 13:09



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:48.


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.