How many amps.? - 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? 
  #1  
Old 06-26-2006
sailortjk1's Avatar
Senior Member
 
Join Date: Dec 2005
Location: Porter, IN
Posts: 4,647
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 11
sailortjk1 has a spectacular aura about sailortjk1 has a spectacular aura about
How many amps.?

How do I deterrmine how many amps. I am drawing?

We recently installed (3) group 27's of 90amp. each: wired in parrallel for a total of 270amp. This is our house bank wich replaced a 4C. The 4c did not seem to have enough amps. for our needs.

We run systems of Auto pilot, running lights, cabin lights, navigation instruments, Vhf radio, stereo radio, TV, DVD Player......... etc.

All are not on at the same time but occassionally are.

I think the biggest power hog is the Auto pilot.

We learned real fast that it is not resoanble to expect the batteries to run the 12v Refrigerator. It simply draws too much. (When cruising we use ice)

So the question is, how do I determine how much I am drawing at any given time?
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 06-26-2006
johnr
 
Join Date: Apr 2006
Location: Mandeville, LA, USA
Posts: 213
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
jr438234606 is on a distinguished road
Get a battery monitoring device.

Well, you could determine how many amps each device draws, then simply add them up. This would of course require that you know what the devices draw, and what the status of each device was (on or off). This could get tricky very fast-- especially for devices that don't draw steady current (like an autopilot). The best solution is to use an amp monitoring device. This could be a clamp on amp meter, but I use a dedicated battery monitoring device called a Link 10 from Xantrex. Here is a link to a Froogle search for Link 10s.

http://froogle.google.com/froogle?q=...oogle&ct=title
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 06-26-2006
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,325
Thanks: 88
Thanked 242 Times in 233 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Yeah, go with a Link10 - excellent device. You can monitor loads, predict time to charge,determine present status of battery bank, it's great.
Just be sure to set it up correctly to reflect the true capacity of your system.
Takes away the guessing game.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 06-26-2006
sailandoar's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Cape Fear, NC, USA
Posts: 208
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
sailandoar is on a distinguished road
Clamp on DC ampmeter

It is magic.
$150 to $300. Makes you an electrical wizard. You simply need to get to any 'single conductor' and put the clamping loop around it and read the current flow.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 06-26-2006
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,325
Thanks: 88
Thanked 242 Times in 233 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Just to clarify for others, the Link 10 is not a clamp-on ammeter, (those are handy, too) The Link10 is basically a little computer that monitors your electrical loads, calculates the amphours left, time left on battery banks, and monitors your voltage levels. It needs to be wired to the current shunt provided. It is critical that you set it up properly to accurately reflect your amphour capacity so that its predictions are correct. It fits in a standard 2" round gauge hole and is about 2 - 3" deep.
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



All times are GMT -4. The time now is 11:43 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.