Please critique my charging schematic - Page 3 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 


Like Tree1Likes
Reply
 
LinkBack Thread Tools
  #21  
Old 04-30-2012
Captainmeme's Avatar
Senior Member
 
Join Date: Aug 2008
Location: East Tennessee
Posts: 806
Thanks: 4
Thanked 17 Times in 16 Posts
Rep Power: 7
Captainmeme is on a distinguished road
Re: Please critique my charging schematic

While eyes are focused here, I've got a couple questions. I noticed that there is a switch position that connects the two batteries in parallel. If one battery is discharged while the other is fully charged and the switch is put into both, would the current flow be dangerous? Why not just diode isolate the two batteries for charging purposes? Diodes are a few dollars each, the echo device is ~$100.00.
Reply With Quote Quick reply to this message Share with Facebook
  #22  
Old 04-30-2012
eherlihy's Avatar
Learning the HARD way...
 
Join Date: Jan 2007
Location: Boston / Ft Myers Area
Posts: 3,668
Thanks: 124
Thanked 74 Times in 73 Posts
Rep Power: 8
eherlihy will become famous soon enough
Re: Please critique my charging schematic

I'll toss another schematic at you. Everything here works;
Reply With Quote Quick reply to this message Share with Facebook
  #23  
Old 04-30-2012
eherlihy's Avatar
Learning the HARD way...
 
Join Date: Jan 2007
Location: Boston / Ft Myers Area
Posts: 3,668
Thanks: 124
Thanked 74 Times in 73 Posts
Rep Power: 8
eherlihy will become famous soon enough
Re: Please critique my charging schematic

Here - in living color - are the ABYC Color Code recommendations;

You CAN vary from this, as long as it is documented, and still be ABYC compliant.

Also, yellow is the preferred color for DC negative, so that you don't mix it up with AC hot.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

USCG Licensed OUPV Captain, ASA 101/103/104/105 Certified Instructor - Also certified in Recreational Marine Electrical Systems
Reply With Quote Quick reply to this message Share with Facebook
  #24  
Old 04-30-2012
eherlihy's Avatar
Learning the HARD way...
 
Join Date: Jan 2007
Location: Boston / Ft Myers Area
Posts: 3,668
Thanks: 124
Thanked 74 Times in 73 Posts
Rep Power: 8
eherlihy will become famous soon enough
Re: Please critique my charging schematic

The fuse types on the batteries in the above schematics are these;

__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

USCG Licensed OUPV Captain, ASA 101/103/104/105 Certified Instructor - Also certified in Recreational Marine Electrical Systems
Reply With Quote Quick reply to this message Share with Facebook
  #25  
Old 04-30-2012
hellosailor's Avatar
Senior Member
 
Join Date: Apr 2006
Posts: 10,896
Thanks: 2
Thanked 103 Times in 100 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Please critique my charging schematic

"There is the same fault indicator that a Blue Seas breaker has - it shuts off. "
Well, yes, but we expect a breaker to be a breaker. These look like the common lighted 12-volt switches made, sold, used, by many sources. There's no way (from the picture) to tell that these are breakers, instead of the common lighted switches, is there?

meme-
An echocharger isolates the batteries while consuming very little power. A diode isolator consumes about 1/2 volt all the time, so you are wasting power. They're cheap but they're inefficient.
And yes, paralleling one good battery with one bad one will pull down the good one until they equalize. Not necessarily dangerous but a good way to kill your good battery.
Reply With Quote Quick reply to this message Share with Facebook
  #26  
Old 05-01-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,284
Thanks: 0
Thanked 79 Times in 70 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Please critique my charging schematic

Quote:
Originally Posted by Captainmeme View Post
While eyes are focused here, I've got a couple questions. I noticed that there is a switch position that connects the two batteries in parallel. If one battery is discharged while the other is fully charged and the switch is put into both, would the current flow be dangerous? Why not just diode isolate the two batteries for charging purposes? Diodes are a few dollars each, the echo device is ~$100.00.
The Echo Charge is a good choice as it will not allow overcharging of the start battery.

The parallel switch, as you say, should not be used to combine a discharged with a charged battery. A neighbor of mine did exactly this yesterday and his charged start battery combined with his pretty discharged house bank (8 golf carts in series/parallel) left him dead in the water.

The parallel switch allows you to charge both banks in the unlikely event of an Echo Charge (or ACR) failure.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Quick reply to this message Share with Facebook
  #27  
Old 05-01-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,284
Thanks: 0
Thanked 79 Times in 70 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Please critique my charging schematic

Quote:
Originally Posted by hellosailor View Post
"There is the same fault indicator that a Blue Seas breaker has - it shuts off. "
Well, yes, but we expect a breaker to be a breaker. These look like the common lighted 12-volt switches made, sold, used, by many sources. There's no way (from the picture) to tell that these are breakers, instead of the common lighted switches, is there?
They definitely are low budget breaker panels, but serviceable as far as I can tell. The description in the West Marine catalog describes them as Carling breakers. I was skeptical when my customer showed it to me last week.
The 6 breaker panel is only $49.

I really prefer Blue Seas panels. But their 6 breaker DC panel is around $200
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Quick reply to this message Share with Facebook
  #28  
Old 05-01-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,284
Thanks: 0
Thanked 79 Times in 70 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Please critique my charging schematic

Quote:
Originally Posted by eherlihy View Post
Here - in living color - are the ABYC Color Code recommendations;

You CAN vary from this, as long as it is documented, and still be ABYC compliant.

Also, yellow is the preferred color for DC negative, so that you don't mix it up with AC hot.
I don't think many follow this though - I've never been on a boat with it as far as I can remember.

I'm just happy when they have used red for positive and black for negative - it seems many don't go that far.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Quick reply to this message Share with Facebook
  #29  
Old 05-01-2012
Member
 
Join Date: Sep 2011
Posts: 41
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
sfbaysailing is on a distinguished road
Re: Please critique my charging schematic

or, it allows me to start off the house bank by switching the ON/OFF to OFF and the 1/2/BOTH/OFF switch to BOTH!
Reply With Quote Quick reply to this message Share with Facebook
  #30  
Old 05-01-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,284
Thanks: 0
Thanked 79 Times in 70 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Please critique my charging schematic

Quote:
Originally Posted by sfbaysailing View Post
or, it allows me to start off the house bank by switching the ON/OFF to OFF and the 1/2/BOTH/OFF switch to BOTH!
Yes it does.

I have 2 separate switches - one for start and one for house - without a crossover option. Maine's solution allows for that.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
S2 7.3 battery charging Lflowers230 S2 0 01-16-2012 12:31 PM
Critique this mooring setup! dvuyxx Gear & Maintenance 12 04-26-2010 09:04 PM
New wiring diagram- please critique! funjohnson Electrical Systems 33 03-23-2010 07:45 PM
Wiring Schematic for boat electronics billbalme Pacific Seacraft 1 03-07-2010 07:43 AM
Battery charging... merttan Gear & Maintenance 17 06-23-2008 04:04 PM


All times are GMT -4. The time now is 08:20 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.