Free 7 Day Trial RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Free 7 Day Trial ×
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 07-15-2020, 02:59 PM   #1
Junior Member
 
Join Date: Nov 2019
Location: Vancouver, WA
Posts: 22
Lithium Batteries and Alternator Protection

Hello All,
I've search the site and can't quite find the information I'm looking for. I'm considering installing Lithium Batteries in my 2019 Fleetwood Southwind 36P. My inverter/charger can support Lithium and the install looks pretty straight forward other than one issue that I'm looking from others that have installed Lithium batteries and needed to install a DC to DC charger to protect the alternator.

The problem I have is that the feed from my main battery and alternator feed into my BCC. It would seem simple just to install the DC/DC charger before the feed into the BCC but at the point of install to the BCC is also the connection for the chassis wiper power and Main AGC fuse (attached PDF on page 1). My assumption is that I could be limiting the wiper and main AGC fuse and be causing other problems.

What have others done in regards to the BCC and still keeping some functionality? Any help is appreciated.

Thanks!
Attached Files
File Type: pdf Chassis_Electrical.pdf (633.0 KB, 20 views)
__________________
2019 Fleetwood Southwind 36P
Auztone 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 07-15-2020, 03:24 PM   #2
Senior Member
 
computerguy's Avatar
 
Join Date: Jul 2010
Location: FT on the Road
Posts: 2,950
Needed to look a little harder. Here is my very detailed post on the install in a Bounder
Bounder Lithium Solar Install
computerguy is offline   Reply With Quote
Old 07-15-2020, 05:45 PM   #3
Junior Member
 
Join Date: Nov 2019
Location: Vancouver, WA
Posts: 22
Good information but not what I'm looking for. You simply installed a manual bypass to protect your alternator from running all the time or when your batteries are fully charged. I would like to install a DC/DC charger or something else and keep as much of the original function of the BCC if possible. I don't plan on installing solar at this time so one of my main ways to charge the batteries is via the alternator when actually traveling between sites. I would like something that would limit the current draw and also protect the alternator without any manual switching but more automatic that works via the ignition switch and no possible human error.
__________________
2019 Fleetwood Southwind 36P
Auztone is offline   Reply With Quote
Old 07-15-2020, 06:50 PM   #4
Senior Member
 
Join Date: Jul 2014
Posts: 29,415
You can remove or disable the isolation solenoid and install a lithium BIM 225. Use heavy cables from both large terminal to the BIM.

Otherwise, disable the isolation solenoid and just connect the B to B charger to each side of it. No need to find the alternator output wiring. You want that to contionusly charge the chassis battery.

Doing it this way makes converting it back if you trade it in and keep the batteries.Click image for larger version

Name:	Capture%2B_2020-07-15-19-46-48.jpeg
Views:	26
Size:	53.5 KB
ID:	293370
twinboat is offline   Reply With Quote
Old 07-15-2020, 06:55 PM   #5
Senior Member
 
jcussen's Avatar
 
Join Date: Jul 2018
Posts: 2,813
I used one of these, and retained the normal boost relay to connect both banks if necessary. https://www.solar-electric.com/victr...LECwLBFJK4ZT5u
__________________
Foretravel tag axle 40 ft. 500 hp/1550 ft/lbs ism 1455 watts on the roof. 600 a/h's lithium down below.
jcussen is offline   Reply With Quote
Old 07-15-2020, 06:56 PM   #6
Senior Member
 
Join Date: Jul 2014
Posts: 29,415
I marked the only 2 points where the batteries connect during charging.

Take a small wire off that solenoid and its disabled.Click image for larger version

Name:	Capture%2B_2020-07-15-19-53-16.jpeg
Views:	46
Size:	75.9 KB
ID:	293372
twinboat is offline   Reply With Quote
Old 07-15-2020, 07:09 PM   #7
Junior Member
 
Join Date: Nov 2019
Location: Vancouver, WA
Posts: 22
I've seen these. Let me try and find an actual P/N on my BCC and get a wiring diagram. I'll see if this is an option and if it will possibly fit.
__________________
2019 Fleetwood Southwind 36P
Auztone is offline   Reply With Quote
Old 07-16-2020, 07:54 AM   #8
Junior Member
 
Join Date: Nov 2019
Location: Vancouver, WA
Posts: 22
So I have the RV Customs Products F73-1020 BCC and was able to download the block diagram from the website. Looks pretty straight forward and should be able to identify the signals at the plugs and the wire color. Looks like now I should start my wiring diagram for the overall project and my parts list. I believe I have the information I'm looking for now and my goal of keeping it as much "normal" as possible. Thanks for the information.
Attached Files
File Type: pdf F73_1020 Block Diagram.pdf (55.1 KB, 30 views)
__________________
2019 Fleetwood Southwind 36P
Auztone is offline   Reply With Quote
Reply

Tags
alternator, batteries, lithium



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
Lithium batteries only and no solar? mclinkaberry RV Systems & Appliances 29 12-14-2016 08:34 PM
Alternator belt and alternator replacement jimloeh Monaco Owner's Forum 7 08-15-2016 05:10 PM
surge protection with high and low voltage protection Delacroix Newmar Owner's Forum 11 05-17-2016 10:16 PM
Alternator Light stays on but alternator charges augiedeg Spartan Motorhome Chassis Forum 1 10-20-2010 07:05 AM
Trident Protection Systems paint protection AFChap MH-General Discussions & Problems 2 09-26-2008 10:28 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 11:18 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.