RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 11-18-2019, 07:24 AM   #1
Junior Member
 
Join Date: Oct 2019
Posts: 4
Battery monitor - with lead acid batteries

On the battery monitor that indicates F, 2/3, 1/3, E, when using lead acid batteries does E mean complete discharge or does it mean around 12V which should be around the max discharge not to damage the batteries.

I the long run I will get a better monitor that gives me actual voltage, but just wondering on the factory ones.

Thanks
__________________

buffalojeep is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 11-18-2019, 09:16 AM   #2
Senior Member
 
Join Date: Jul 2014
Posts: 19,711
E is for empty, 10.5 volts. Run them down to 1/4 , you'll be fine.

The 50% thing is just for longest service life/cost number, your not doing any damage.

Run them down to 10% and you will loose an extra day of life each time.

You want then to really last, only run them down to 90%.

Here is a chart.
Click image for larger version

Name:	Capture%2B_2019-11-08-18-21-08.jpeg
Views:	7
Size:	64.3 KB
ID:	267258
__________________

twinboat is offline   Reply With Quote
Old 11-18-2019, 04:04 PM   #3
Senior Member/RVM #90
 
MSHappyCampers's Avatar


 
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 39,835
Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Looks like twinboat answered your question. Noticed you are kinda new on the forum and wanted to say hello.

Good luck, happy trails, and God bless!
__________________
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
MSHappyCampers is offline   Reply With Quote
Old 11-18-2019, 07:36 PM   #4
Senior Member
 
Winnebago Owners Club
Workhorse Chassis Owner
Join Date: Nov 2018
Posts: 404
I'm not sure that question can be answered without a direct measurement. What corresponds to Full through Empty on mine or anyone else's might be different than yours.

A free harbor freight voltmeter connected to your battery bank could be a very enlightening exercise. Once you get a feel for what *your* status panel is displaying, you won't have to wonder.

Mark B.
Albuquerque, NM
Mark_K5LXP is offline   Reply With Quote
Old 11-18-2019, 07:51 PM   #5
Member
 
Fritz.'s Avatar
 
Join Date: Apr 2019
Posts: 86
Quote:
Originally Posted by buffalojeep View Post
On the battery monitor that indicates F, 2/3, 1/3, E, when using lead acid batteries does E mean complete discharge or does it mean around 12V which should be around the max discharge not to damage the batteries.

I the long run I will get a better monitor that gives me actual voltage, but just wondering on the factory ones.

Thanks
Do you have a 12v volt outlet inside the rig, like for a cigarette lighter plug you'd plug a 12v tv into? You can put a voltage display into those to monitor voltage.

Voltage isn't the best way to monitor battery level though.
__________________
2011 Chevy 2500HD Z71 6.0 gas/ 2004 28' pilgrim travel trailer 9880 GVWR(I never heard of them either)
Yes it's a slow setup
Fritz. is offline   Reply With Quote
Old 11-18-2019, 08:04 PM   #6
Senior Member
 
Join Date: May 2017
Posts: 573
Get a Victron BMV-700 !
__________________
Retired. 31 year of automotive engineering for one of the Detroit 3, specializing in Powertrain Control Systems.
theoldwizard is offline   Reply With Quote
Old 11-18-2019, 09:33 PM   #7
Senior Member
 
powercat_ras's Avatar
 
Winnebago Owners Club
Solo Rvers Club
Join Date: May 2015
Posts: 1,335
I supplemented with a Victron BMV-700 Battery Monitor, $ 104, and can see exactly how much charge and how much current is flowing in and out at all times.

The thresholds vary slightly from panel to panel but they indicate based on the voltage seen at the monitor panel...

The % values are only accurate with little or no load on the batteries without charging taking place. If there is a large load on the batteries like from the inverter the voltages shown below will not be an accurate indication of the stored charge remaining. If batteries are being charged, you will see the top LED no matter how little stored charge remains in the batteries.


Top LED at >= 12.5 to 12.6 V
2/3 at >=12.2 V to 12.3 V
1/3 at >= 11.7 to 11.8 V

Battery almost totally discharged is <= 10.5 Volts

However, I suspect that the bottom red LED may light even at voltages less than 10.5

The main value of the bottom LED is to clue you in that you have operated the battery disconnect switch when you are not on generator or shore power.
__________________

__________________
Randy - Manhattan, Kansas
2015 Vista 27N
2016 Honda HR-V
powercat_ras is offline   Reply With Quote
Reply

Tags
batteries, battery, monitor



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
Equalization of RV Lead Acid Batteries bepar108 Tiffin Owner's Forum 4 09-09-2019 11:13 AM
AGM vs Lead Acid batteries with my current converter CyrusL RV Systems & Appliances 6 04-25-2018 11:01 AM
AGM and lead acid batteries Wingnude National RV Owner's Forum 4 10-30-2016 10:17 AM
AGM vs Lead Acid Batteries jeepsrule RV Systems & Appliances 9 03-03-2016 10:49 PM
No More Lead Acid Deep Cycle Batteries?? leeines RV Systems & Appliances 15 10-03-2012 11:45 AM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:58 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×