Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 14-06-2012, 20:59   #16
Marine Service Provider

Join Date: Sep 2008
Location: Victoria B.C.
Boat: CS27
Posts: 1,744
Re: Bowthruster/Windless Battery

Quote:
Originally Posted by westsail42 View Post
Exactly. And the original poster's query was about the windlass/thruster battery, whose usage would likely be similar to that of an engine start battery.
Agreed.
__________________

__________________
mitiempo is offline   Reply With Quote
Old 14-06-2012, 21:10   #17
Registered User

Join Date: Dec 2009
Posts: 3,016
Images: 4
You must put a fuse or breaker at both ends of the circuit. Both the charger and the battery are power sources.

Personally I consider a remote windlass battery to be a waste of resources. Not economical in either cost or weight or functionality.
__________________

__________________
daddle is offline   Reply With Quote
Old 14-06-2012, 21:34   #18
Marine Service Provider

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

In the early days when we had little field experience we recommended connecting the alternator to the house battery and letting the Combiner top off the starting battery. However after 20 years of experience it turns out to make no difference and leaving the alternator on the starting battery maintains warranty on new engines.

A Combiner that can carry the full output of a 100amp alternator will always charge an auxiliary faster than an echo charge limited to 15 amps.

True, a regulator with an external sense will detect the battery voltage instead of the alternator voltage and avoid the 0.7 volt drop. BUT WHICH BATTERY DO YOU CONNECT THE SENSE WIRE TO? If it is on the bigger battery that comes up to voltage slower, won't that overcharge a smaller battery? If you connect it to the starting battery and it comes up rapidly won't that leave the house battery less than fully charged? It also can be catastrophic if you have battery switches, I've seen and heard of batteries getting fried when the sense wire was on a battery NOT on charge so full output went to another battery bank.
__________________
Andina Marie is offline   Reply With Quote
Old 14-06-2012, 21:40   #19
Marine Service Provider

Join Date: Sep 2008
Location: Victoria B.C.
Boat: CS27
Posts: 1,744
Re: Bowthruster/Windless Battery

Quote:
Originally Posted by Andina View Post
A Combiner that can carry the full output of a 100amp alternator will always charge an auxiliary faster than an echo charge limited to 15 amps.
True if the auxiliary battery is used for a windlass probably but a dedicated start battery uses much less than 1 AH during an engine start - I doubt a combiner would be much faster in that case.
__________________
mitiempo is offline   Reply With Quote
Old 14-06-2012, 22:01   #20
Marine Service Provider

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

When it took 5 minutes to start your engine and you have a fully charged windlass battery why would you spend over $120 for a 15 amp charger that is going to take 4 hours to re-charge the starting battery when a $60 Combiner will do it in 1 hour? I fail to see anything an echo charger does that justifies the extra equipment. Keep it simple. Does echocharge have an unlimited warranty? Will they replace a 15 year old one that got melted by lighting?
__________________
Andina Marie is offline   Reply With Quote
Old 15-06-2012, 05:56   #21
Commercial Member
 
CharlieJ's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Petersburg, FL
Boat: Gulfstar Long Range Trawler; 53'; BearBoat
Posts: 837
Re: Bowthruster/Windless Battery

Comment on Post #17
An over current protection device (OCPD: fuse or circuit breaker) is not required at both ends of the conductor by the ABYC E-11 Standard if the alternator or battery charger is self limiting. The definition of "self limiting" is:
Quote:
11.4.23 Self-limiting - A device whose maximum output is restricted to a specified value by its magnetic or electrical characteristics.
There is a requirement for an OCPD within 7" (or more under special circumstances) of the conductor's attachment to the battery.

Hope this clarifies the issue.
Charlie
__________________
Charlie Johnson
JTB Marine Corporation
"The Devil is in the details and so is salvation."
CharlieJ is offline   Reply With Quote
Old 16-06-2012, 09:15   #22
Marine Service Provider

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

Quote:
Originally Posted by westsail42 View Post
Exactly. And the original poster's query was about the windlass/thruster battery, whose usage would likely be similar to that of an engine start battery.
If the starting battery is low due to an engine problem you now have to wait for the house battery to get topped off and then wait for the echo charger to recharge the starting battery which at 15 amps could take many hours. A Combiner100 for 1/3 the price will have it charged in 1/4 that time.

By leaving the alternator on the starting battery you give a preferential priority to charging it first and then supplying the house battery.

It just seems like an unnecessary complicatin to add a 15 amp regulator when the supply to the battery(ies) is already regulated.
__________________

__________________
Andina Marie 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 06:50.


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.