Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-11-2012, 13:49   #1
Registered User

Join Date: Jun 2010
Location: MI
Boat: Catalina 36 Hull 91
Posts: 9
Question Battery Isolator

I have an 91 amp alternator and wind generator. One house bank 420 amps, starting battery gets trickle charged off the house battery. Should I use a Battery Isolator to help control the alternator and wind generator output? The second battery connection would go to a 12 water heater element.
Thanks for your input,
__________________

__________________
Capt. Chuck
Capt.Chuck is offline   Reply With Quote
Old 21-11-2012, 08:49   #2
Marine Service Provider

Join Date: Dec 2003
Location: South Carolina
Boat: Philip Rhodes Custom
Posts: 395
Re: Battery Isolator

No, an isolator is the wrong choice. Isolators divert current to the LOWEST load so it will always be sending power to the water heater even if your batteries need a charge.

The regulator on the alternator will cut the current down as the batteries reach full charge so you don't normally want to be wasting fuel to heat water at such low efficiency. If you NEED extra water heating look into a heat exchanger process.

The wind generator output is free (more or less) and although I can't name a source I understand there are regulators that already have a "dump" output to connect to a resistive load like a water heater. This will only divert energy to the heater AFTER the battery has been charged.
__________________

__________________
Andina Marie is offline   Reply With Quote
Old 22-11-2012, 09:18   #3
Registered User

Join Date: Jun 2010
Location: MI
Boat: Catalina 36 Hull 91
Posts: 9
Re: Battery Isolator

Thanks, that's right. What was I thinking
__________________
Capt. Chuck
Capt.Chuck is offline   Reply With Quote
Old 22-11-2012, 09:34   #4
Registered User

Join Date: Jul 2006
Posts: 3,949
Re: Battery Isolator

In my experience, the simplest and best way is to direct all charging sources, including the wind and alternator, to the house battery bank. If you also want hot water run the cooling water">engine cooling water through the hot water heater, as many boats come standard. I prefer to just stop the wind generator if it is producing excess power--why leave it spinning and wearing out bearings and such?
__________________
Kettlewell Cruising
Kettlewell 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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 17:06.


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.