Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 08-30-2020, 09:00 PM   #1
3 Rivet Member
2020 20' Bambi
Clayton , North Carolina
Join Date: May 2020
Posts: 229
Lifeline AGM SOC without a BMV-712 Smart

Hi folks, I did upgrade the Atkinson charge controller in my 2020 Bambi 20í to a Victron 100/30 MPPT when I added more roof solar. With the Atkinson I had a galley readout that would tell me state of charge and I could see in the morning I still had about 70-75%. Seems with the VictronConnect app (and no BMV-712 Smart which is project for 2021) I cannot actually see SOC as a simple readout. Is there a rule of thumb regarding battery voltage reading versus SOC? I do have the Lifeline AGM data sheets but the indo sheet uses open circuit voltage for aged batteries.
Thanks, Stephen
smsasf is offline   Reply With Quote
Old 08-30-2020, 09:47 PM   #2
Site Team
wulfraat's Avatar

2017 30' International
Broomfield , Colorado
Join Date: Apr 2009
Posts: 3,535
Images: 1
Lifeline AGM SOC without a BMV-712 Smart

From the lifeline manual..... using open circuit voltage to approximate state of charge...

With house loads on the battery itís nearly impossible to know what the resting voltage is when you quickly peaking at the sea level battery voltage display.... Just know that it can easily read 0.1 - 0.2 volts lower than resting if you have some lower draw house loads applied.

Without a shunt your are only guessing unless you physically disconnect the batts for a few hours and read OCV.
Attached Thumbnails
Click image for larger version

Name:	Adjustments.jpg
Views:	29
Size:	279.8 KB
ID:	377319  
wulfraat is offline   Reply With Quote

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
Victron BMV-712 Smart w/ AS AGM batteries kittmaster Electrical - Systems, Generators, Batteries & Solar 14 08-23-2022 08:11 AM
Going to JC, need a part ASAP. BMV-712 smart kittmaster General Repair Forum 5 07-20-2020 03:58 PM
Victron BMV-712 Smart Battery Monitor Install&Review lzhome Generators & Solar Power 0 10-03-2019 06:05 AM
Sync settings for Lithium battteries - BMV-712 Smart waninae39 Generators & Solar Power 0 03-30-2018 01:58 PM
Victron BMV-712 install in 2017 30 International dmcgaugh Batteries, Univolts, Converters & Inverters 3 03-09-2018 01:24 AM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 11:19 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.