Multiple Charging Sources - SailNet Community
 
LinkBack Thread Tools
post #1 of 6 Old 02-19-2007 Thread Starter
Member
 
Join Date: Oct 2006
Location: St Thomas, USVI
Posts: 49
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Multiple Charging Sources

Some architecture questions for a refit--

I will have three banks of two batteries each. Two banks are house and one is starting/windlass. The starting bank is charged at 12V but is isolated by switching and put in series to get 24V for the starter and windlass.

All three banks are charged by the following: (2) 100 amp main engine alternators, 250 amps out of a generator, a shore power charger, wind generator and solar panels.

Question is-- can any combination of these charging sources charge directly into each if the batteries (through a common charging bus bar) without separation or will one interfere with another and I need some form of charging controller?

Keith
kaakre is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 6 Old 02-19-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 18 Times in 14 Posts
Rep Power: 16
         
UMM.. One quick question... why two house banks. You'll generally be better off with one large house bank, rather than two smaller house banks.

Also, why do you have a mixed voltage system? It would be far simpler to have an all 12V system.

You should probably have a charge controller of some sort. Most wind generators will require one specifically designed for wind generators that can provide braking current to the wind generator when the generator starts to go too fast. Most solar panels will generally require one to be working at their highest efficiency... usually a MPPT-type charge controller will give you the best results there.

As for the two alternators and the generator, they should probably be going through a charge controller of some sort, to prevent them from overcharging and killing the batteries.

One thing that you don't mention is the size of the various banks, and what type of batteries you're using for them.

You really haven't given enough information to get a really useful response.

Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #3 of 6 Old 02-20-2007 Thread Starter
Member
 
Join Date: Oct 2006
Location: St Thomas, USVI
Posts: 49
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Am considering two banks for the house-- will be combined for normal use but am considering being able to isolate two for use as a backup 24v starting source.

Mixed voltage is due to legacy items. Was originally a 220/24V Euro boat. Starters for engine and generator as well as windlass are 24V. Lower amperage is a benefit.

The charge controller issue is the question. Is there a company that sells such a product?
kaakre is offline  
Quote Quick Reply Share with Facebook
 
post #4 of 6 Old 02-20-2007
Senior Member
 
Join Date: Nov 2006
Location: Massachusetts
Posts: 376
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
 
It used to be that you used a battery isolator to prevent reverse current flow from a plurality of batteries connected to a common charging source.

A brief search yielded these little nuggets:
http://www.hellroaring.com/rv.htm
http://www.geocities.com/harald_nancy/isolator.htm
http://www.off-road.com/chevy/reviews/hellroaring/
http://www.cmsquick.com/tech_03_isolsys.html

I have no interest in any of them and there are no warranties express or implied!

Last edited by Goodnewsboy; 02-20-2007 at 08:14 PM.
Goodnewsboy is offline  
Quote Quick Reply Share with Facebook
post #5 of 6 Old 02-21-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 18 Times in 14 Posts
Rep Power: 16
         
Yes, someone probably makes a dual-voltage charge controller. Whether it'll do for what you need is a different question. I would personally recommend getting separate charge controllers for the 24v and the 12v sides of the system.

Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #6 of 6 Old 02-21-2007 Thread Starter
Member
 
Join Date: Oct 2006
Location: St Thomas, USVI
Posts: 49
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Thanks Goodnewsboy and Sailingdog.

I will look into the isolator issue. Thanks for the links.

This is where I am going now.

Without a system level controller for the six charging sources (alternator 1, alternator 2, generator, shore power, solar, wind) I assume that I can only use one charging source at a time. Otherwise, I assume that the alternators will shut down the smart controllers or vice versa.

Main Engine Alternators

The alternators on the main engine are the single wire universal type with built in regulators. To avoid the lazy alternator problem from two regulators charging a common battery set I am considering having one charge the house and the other charge the start batteries.

Generator

I found a 5000 watt 220 to 110 coverter with some level of power conditioning. This could feed the 110 AC bus and a couple of smart chargers (one house/one start) that operate when the generator is used and the main engine is off.

Shore Power

Feeds AC bus and smart chargers when shore power is selected.

Solar/Wind

Probably product specific but these are common add-ons and the integration problems have probably been sorted out.

Keith
kaakre is offline  
Quote Quick Reply 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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Charging with Solar Power Kevin Jeffrey Gear and Maintenance Articles 0 07-28-2003 08:00 PM
Charging Batteries Sue & Larry Gear and Maintenance Articles 0 09-25-2002 08:00 PM
Multiple Sources for Battery Charging Tom Wood Gear and Maintenance Articles 0 12-07-2001 07:00 PM
Multiple Charging Devices Tom Wood Gear and Maintenance Articles 0 02-01-2001 07:00 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome