Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 20-02-2019, 04:28   #1
Registered User

Join Date: Dec 2009
Location: Australia
Boat: building Roberts Mauritius 43ft
Posts: 878
Installation of Ammeter

I'm still working on the alternator wiring. But I'm following advice given on this forum and intend putting in a 100A ANL fuse within 7 inches of the battery. (I should have the fuse holder any day now and I have two spares which arrived yesterday)

Now I'm considering an ammeter to check the output of the alternator. But I figure that will depend on the state of charge of the batteries as well as any load on the batteries e.g. winch. Is the ammeter really necessary or of any use?

If I want to put the 100A ammeter on the switch panel with all the other instruments I have concluded I need to "wire in" a 100A shunt between the alternator and the ANL fuse and then take two light wires up to the ammeter on the switch board. (My alternator is 24V 60A)

I would appreciate comments on what I am planning.

NOTE I have worked out the three wires on the alternator.

Some people may find this helpful.


Alternator Terminals Explained
https://jasoceania.co.nz/articles/al...nals-explaine
__________________

coopec43 is offline   Reply With Quote
Old 20-02-2019, 06:34   #2
Registered User

Join Date: Sep 2016
Posts: 34
Re: Installation of Ammeter

I wired the shunt to the negative side of the battery and use a switch to go between charge and discharge. For me it isn't the only monitor but it is another monitor, something to help me get an idea of what is going on with the systems I have onboard.

I am frugal (CHEAP) so I went with an inexpensive one off Amazon, I may upgrade it at some point to the much more expensive "SMART" monitor, but for now it is giving me what I want. I tend to use it more than I thought I would, every time I start the generator, turn on the motor, get good wind, or good sun I can see what is happening with the batteries.

Here is the one I went with for now.

https://www.amazon.com/bayite-6-5-10...8X3ZH5VAEJWFBM
__________________

sguerrero1971 is offline   Reply With Quote
Old 20-02-2019, 12:31   #3
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 7,295
Re: Installation of Ammeter

What other monitoring device(s) do you have? If you already have a battery monitor that shows net amps, then this would be a waste. Net amps less the load = input amps.


Your boat, your choice.
__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Old 20-02-2019, 14:02   #4
Registered User
 
yalla's Avatar

Join Date: Jul 2013
Location: Desolation B.C.
Boat: Newport 28, Aloha 32
Posts: 78
Re: Installation of Ammeter

these cheap little meters can be useful if you have several inputs to measure separately. Alot of (most?) boats have an alternator and solar. It could show you that alternator output is lower than usual (loose belt?) which you may not otherwise notice if solar is doing better than you expect.

I guess the same can be said for the load side, though a useful example escapes me just now.
yalla is offline   Reply With Quote
Old 20-02-2019, 14:27   #5
Registered User
 
El Pinguino's Avatar

Join Date: Aug 2013
Location: Somewhere in Patagonia
Posts: 4,941
Re: Installation of Ammeter

I have 4 analog ammeters plus the digital one on the switchboard which shows net in/out all sources and loads...

The 4 inputs are shore/Honda, alternator, solar and wind/water.

You can tell on the instant if any one supply has spat the dummy. You can even see when a bit of kelp has fouled the towed impeller .... when in wind mode that one also shows wind speed.... 20 amps = 60 knots apparent....
__________________
Simple Celestial https://www.dropbox.com/s/a5blh1rgvi...ation.pdf?dl=0

A little bit about Chile http://www.cruiserswiki.org/wiki/Chile
El Pinguino is offline   Reply With Quote
Old 20-02-2019, 17:32   #6
Registered User

Join Date: Dec 2009
Location: Australia
Boat: building Roberts Mauritius 43ft
Posts: 878
Re: Installation of Ammeter

Thinking about it, when I put a battery on charge I always look at the ammeter to see how it is charging to get an indication of how flat the battery is and then expect the charge to drop to drop back over a few hours. If the charger was still charging strongly after two days I would start to get alarmed.

Yes I can see I need to install one for the alternator and a separate one for the solar panels

Thanks.
coopec43 is offline   Reply With Quote
Old 21-02-2019, 05:47   #7
Registered User

Join Date: Sep 2016
Posts: 34
Re: Installation of Ammeter

Quote:
Originally Posted by Stu Jackson View Post
What other monitoring device(s) do you have? If you already have a battery monitor that shows net amps, then this would be a waste. Net amps less the load = input amps.


Your boat, your choice.
I have the charge controller for the solar and an analog Amp meter for the altenator, both of which show me charge amps for these two systems. The Wind generator has a built in MPPT controller so no display. I use the amp meter on the panel to show total charge rate, and since all of my load comes from the house bank I can see what my discharge rate is. If I want to get amp hours, I clear total watts, run my systems for an hour take a reading and do the math. Not the best but for $16 it works for me.
__________________

sguerrero1971 is offline   Reply With Quote
Reply

Tags
installation

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale: Blue Sea 8005 Analog DC Ammeter 0-25 Amp silverp40 Classifieds Archive 6 15-08-2013 19:55
Inconsistent ammeter & alternator macbeth Electrical: Batteries, Generators & Solar 6 23-07-2012 07:17
Alternator Wire and Ammeter sdowney717 Electrical: Batteries, Generators & Solar 5 14-11-2011 08:21
ammeter question #2 schoonerdog Electrical: Batteries, Generators & Solar 9 13-07-2007 11:26
Ammeter Sizing svcattales Electrical: Batteries, Generators & Solar 7 01-09-2005 02:50



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 10:10.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.