alternator help. - SailNet Community
 
LinkBack Thread Tools
post #1 of 2 Old 12-23-2000 Thread Starter
Junior Member
 
Join Date: Dec 2000
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
alternator help.

I have just replaced my 55amp alt. on my 3GM30F with an 80amp yanmar unit. Before I replaced the 55amp I checked the voltage and it was at 14.3 the 80amp is only puting out 13.7 at all rpm''s.
Is there a problem? There was only 20 mins. between the voltage test.

Thanks,
Chris
hwkmoon is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 2 Old 12-26-2000
Member
 
Join Date: Dec 2000
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 15
 
alternator help.

Chris,

I am somewhat unfamiliar with that alternator. If you could answer the following questions, I might be able to form a better picture of the problem:
1) Is the 80amp unit off a boat with gel-cells?
2) What is the size of the bank(s), its/their state of charge, and what type of battery (Gel, AGM, flooded)?
3) I assume that the OEM alternators have internal regulation (i.e. no external box that attaches to alternator via a set of wires), please advise.
4) Do you use any kind of diodes, combiners, etc. to distribute charge among several battery banks?

For example, if you use diodes to split your alternator output among battery banks and the alternator has no external voltage sense wire, then the 0.6V mismatch would correspond perfectly with the voltage drop associated with diode systems. In this case, you''d have to adjust the voltage setpoints in the alternator to accomodate the diodes or get rid of the diodes.

Personally, I would have dropped the OEM altogether and gone third party like Ample Power, Balmar, etc. These systems have external regulators with battery voltage sense wires, so no matter how your electrical system is configured, they''ll adjust the voltage output from the alternator. Furthermore, there is nothing to change or adjust if you reconfigure.
Constantin is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

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



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