Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-15-2014, 03:12 PM   #43
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,282
Sorry, but 'Myron' should change his name to 'Moron'!!! Deep cycle batteries are not measured by either CCA (cold cranking amps) or MCA (marine cranking amps). They are measured by the amp/hour capacity at a stated rate of discharge (usual standard here is the 20 hour rate).

Your battery manufacturer should have a table that tells you what the residual voltage should be after a known discharge using the 20 hour rate. Cranking amps is meaningless!!



Lew Farber
RVIA/RVDA Nationally Certified Master Tech
Master Tech Energy Systems, Inc.
AM Solar Certified Installation Center
Lifeline Batteries**Magnum Inverters
541-490-6357
__________________

__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is online now   Reply With Quote
Old 10-15-2014, 03:21 PM   #44
Rivet Master
 
PharmGeek's Avatar

 
2014 30' FB FC Bunk
Hoover , Alabama
Join Date: Dec 2012
Posts: 3,377
They just can't keep good help these days

I told the dude about the boiler - I mean converter and he quickly said "you didn't add water to em did ya?!"

He went on about how many are meant to "vent" or some such...


Sent from my iPhone using Airstream Forums
__________________

__________________
“The atoms of our bodies are traceable to stars that manufactured them...We are not figuratively, but literally stardust.”


PharmGeek is offline   Reply With Quote
Old 10-15-2014, 03:26 PM   #45
Rivet Master
 
PharmGeek's Avatar

 
2014 30' FB FC Bunk
Hoover , Alabama
Join Date: Dec 2012
Posts: 3,377
Well - at least I think I can say the cells are not damaged.

I need to look up that table and I will run some load on the batteries and see how they act

I know 2 weekends ago they did the job no problems but that was a short weekend trip and I ran the generator a couple hours once as well


Sent from my iPhone using Airstream Forums
__________________
“The atoms of our bodies are traceable to stars that manufactured them...We are not figuratively, but literally stardust.”


PharmGeek is offline   Reply With Quote
Old 10-16-2014, 07:09 AM   #46
Rivet Master
 
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,648
Make sure you only add distilled water not tap water. Actually running a CCA test might damage a deep cycle battery. Find a dummy load and run a test like I outlined above. It at least gives you a relative indicator of the capacity left in the battery. Here are some curves on batteries discharge. Try not to geek out. If you can find a large high power resistor you can use that but it will get hot.

https://images.search.yahoo.com/sear...scharge+curves

You need one of these. You can adjust the resistance from 25 ohms on down to get the load you want. You can measure current using ohms law and measuring the voltage drop across the resistor. I=V/R and also measure the voltage across the battery. P=IV to get the watts dissipated in the resistor. You need to keep track of the hours it takes to get the voltage down below 11V or whatever the manufacture considers dead.

http://www.ebay.com/itm/NEW-25-Ohm-1...item3ce96ba246

There are some USB data loggers on Ebay cheap but they have a 5V max input voltage. You could make a simple voltage divider circuit to drop the voltage to where the data logger can handle it. It all depends on how much time you want to spend to get your answer.

I would setup a Labview program to do this, if I were at work.

Perry
__________________
perryg114 is offline   Reply With Quote
Old 10-16-2014, 02:05 PM   #47
Rivet Master
 
PharmGeek's Avatar

 
2014 30' FB FC Bunk
Hoover , Alabama
Join Date: Dec 2012
Posts: 3,377
I think I still have a battery learning curve whew


Sent from my iPhone using Airstream Forums
__________________

__________________
“The atoms of our bodies are traceable to stars that manufactured them...We are not figuratively, but literally stardust.”


PharmGeek is offline   Reply With Quote
Reply


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

Advanced Search
Display Modes

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
Who's Thirsty???? Bluemoon64 Off Topic Forum 6 11-27-2013 07:42 AM
Cell Phone for full timer Gunnyusmc Full-Timing 79 02-16-2008 09:12 AM
Mucho Gusto - New Member South of the Border IzZihua Member Introductions 0 07-15-2006 01:55 AM
Cell phone provider question (T Mobile) yargseth Electrical - Systems, Generators, Batteries & Solar 20 04-10-2004 07:39 PM
Best cell service in Texas State Parks? JeffandSuzanne Our Community 14 02-20-2004 10:39 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:23 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.