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


Reply
 
Thread Tools Display Modes
Old 04-12-2024, 12:08 PM   #1
Junior Member
 
Join Date: Mar 2021
Location: Sierra Foothills of California
Posts: 25
LifePo4 drainage question

You know how it goes sometimes, you search for the answer to YOUR exact question and it doesn't quite match. So pardon me if I missed this particular scenario:
We have a new GeoPro 2024 19FDS trailer with 2 x 100 amp solar panels. I swapped out the 2 lead acid for 2 x 100amp lithium near the end of the season with the hopes of one more trip, but instead had to close it up for the season. I opted to cover the trailer during the off season due to dust and grime, so there went the solar panels keeping things charged.
After about 6 weeks, I checked the charge on the batteries and was surprised to see them at about 10%, yikes! I charged them back up and now recharge every 2 weeks. My question, is there something specific to this model that drains the batteries so quickly? I do not keep anything knowingly on in the trailer.
Solutions? Disconnect the batteries? Turn off all the breakers? Keeping the charger hooked up 24/7 is not a preference. There is a switch at the battery that I turn off, but this does not solve the problem.
Thanks for some suggestions!
MrCampALot is offline   Reply With Quote
Old 04-12-2024, 12:22 PM   #2
Senior Member
 
Join Date: Apr 2022
Location: Tarpon Springs FL
Posts: 3,701
6 weeks
42 days
190ah
= 0.198 amps per hour

Good for a trailer parasitic load
Would not look further for any drain

If you want zero parasitic
Take the main negative cable off the battery
__________________
Tarpon Springs FL
2022 Salem 24RLXL
Aussieguy is offline   Reply With Quote
Old 04-12-2024, 01:31 PM   #3
Senior Member
 
Join Date: Feb 2020
Location: Loveland, OH
Posts: 1,242
Yup, disconnect the negative lead. My 2x206Ah LiFePO4 batteries sat uncharged for 18 months but completely disconnected from the trailer. They were fully charged (13.6V) at the start and 13.4V (99%) after 18 months. The propane detector draws .22A so if I had left the batteries connected to the trailer for 18 months, they would have been dead as a doornail.
__________________
2015 Chevy 2500HD 6.0 4x4 CC SB
2021 Salem Heritage Glen 290RL > GenY
1600W solar > 8400Wh LiFePO4 > Victron MultiPlus II > Cerbo GX
corn18 is offline   Reply With Quote
Old 04-12-2024, 01:49 PM   #4
Trailer Park Supervisor
 
NJKris's Avatar
 
Join Date: Sep 2018
Location: Northern NJ
Posts: 8,758
Disconnect it. I have one sitting in basement past two years waiting for me to install it, still at 50% it was (or just above that) all this time. They barely self-discharge. The battery disconnect does not affect CO alarm draw, which seems to be a big parasitic draw.
__________________
2019 Rockwood Geo Pro G19FD w/off road package
2015 Ford F150 XLT Super Cab 4x4 V8
Yes, I drink the water!
NJKris is offline   Reply With Quote
Old 04-12-2024, 01:58 PM   #5
Senior Member
 
Join Date: Apr 2020
Posts: 722
I think most people, when they get into a serious re-do of their electrical system, install a true battery disconnect. One connected directly to the battery, with ALL loads connected to the load side of the switch.
Just don’t forget to turn it on before towing, and make sure you turn off solar before battery, and battery before solar when turning the system on.
__________________
2019 F150 HDPP 4X4 3.5. 2500lb payload.
2018 Rockwood 2506
Half Ton Heavy is offline   Reply With Quote
Old 04-12-2024, 02:04 PM   #6
Trailer Park Supervisor
 
NJKris's Avatar
 
Join Date: Sep 2018
Location: Northern NJ
Posts: 8,758
Quote:
Originally Posted by Half Ton Heavy View Post
I think most people, when they get into a serious re-do of their electrical system, install a true battery disconnect. One connected directly to the battery, with ALL loads connected to the load side of the switch.
Just donít forget to turn it on before towing, and make sure you turn off solar before battery, and battery before solar when turning the system on.
Very important what Half Ton Heavy said, battery must be connected to controller before panels are energized, lest you risk solar controller damage.
__________________
2019 Rockwood Geo Pro G19FD w/off road package
2015 Ford F150 XLT Super Cab 4x4 V8
Yes, I drink the water!
NJKris is offline   Reply With Quote
Old 04-12-2024, 04:20 PM   #7
Junior Member
 
Join Date: Mar 2021
Location: Sierra Foothills of California
Posts: 25
It makes sense to install a disconnect switch, but until then, regarding the comments about simply disconnecting the negative on the battery, is this problematic in its own right to possibly damage the solar controller?
MrCampALot is offline   Reply With Quote
Old 04-12-2024, 06:48 PM   #8
Senior Member
 
Join Date: Apr 2020
Posts: 722
Quote:
Originally Posted by MrCampALot View Post
It makes sense to install a disconnect switch, but until then, regarding the comments about simply disconnecting the negative on the battery, is this problematic in its own right to possibly damage the solar controller?
No, you you just have to be cognizant to turn of the panels before shutting the whole coach down.
__________________
2019 F150 HDPP 4X4 3.5. 2500lb payload.
2018 Rockwood 2506
Half Ton Heavy is offline   Reply With Quote
Old 04-12-2024, 07:53 PM   #9
Senior Member
 
Join Date: Apr 2022
Location: Tarpon Springs FL
Posts: 3,701
Panels are not producing power as it is under covers
If the controller has more than one output voltage would be best to connect to battery before removing cover

Or disconnect panel s as well
__________________
Tarpon Springs FL
2022 Salem 24RLXL
Aussieguy is offline   Reply With Quote
Old 04-12-2024, 08:56 PM   #10
Senior Member
 
Join Date: Aug 2023
Location: Bayou Vista, TX
Posts: 181
This discussion about battery disconnect switch and solar controllers. Is there a DPDT battery disconnect available somewhere? If so that could kill power to both battery and solar with just one switch. I may go searching, even though I don't have solar (yet).
__________________
2021 Forest River Wildwood 171RBXL
Towed by 2018 Toyota Tundra TRD SR5
reidfo is online now   Reply With Quote
Old 04-12-2024, 09:35 PM   #11
Senior Member
 
Join Date: Feb 2020
Location: Loveland, OH
Posts: 1,242
Quote:
Originally Posted by reidfo View Post
This discussion about battery disconnect switch and solar controllers. Is there a DPDT battery disconnect available somewhere? If so that could kill power to both battery and solar with just one switch. I may go searching, even though I don't have solar (yet).
I just use a DC breaker for my solar panel disconnects. SPDT that way it disconnects both + and -. I flip those off first, then disconnect the batteries. Opposite sequence for powering up. Someone convinced me that I needed this vs. a fuse or a single pole breaker. I have two independent arrays that go to 2 MPPT's so I have 2 of these breakers.

https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1
Attached Thumbnails
Click image for larger version

Name:	IMG_5710 2.jpg
Views:	14
Size:	389.9 KB
ID:	298647   Click image for larger version

Name:	DC wiring 290RL rev 2 copy.jpg
Views:	17
Size:	262.3 KB
ID:	298648  
__________________
2015 Chevy 2500HD 6.0 4x4 CC SB
2021 Salem Heritage Glen 290RL > GenY
1600W solar > 8400Wh LiFePO4 > Victron MultiPlus II > Cerbo GX
corn18 is offline   Reply With Quote
Old 04-12-2024, 10:11 PM   #12
Senior Member
 
Join Date: Apr 2021
Posts: 2,453
Quote:
Originally Posted by MrCampALot View Post
You know how it goes sometimes, you search for the answer to YOUR exact question and it doesn't quite match. So pardon me if I missed this particular scenario:
We have a new GeoPro 2024 19FDS trailer with 2 x 100 amp solar panels. I swapped out the 2 lead acid for 2 x 100amp lithium near the end of the season with the hopes of one more trip, but instead had to close it up for the season. I opted to cover the trailer during the off season due to dust and grime, so there went the solar panels keeping things charged.
After about 6 weeks, I checked the charge on the batteries and was surprised to see them at about 10%, yikes! I charged them back up and now recharge every 2 weeks. My question, is there something specific to this model that drains the batteries so quickly? I do not keep anything knowingly on in the trailer.
Solutions? Disconnect the batteries? Turn off all the breakers? Keeping the charger hooked up 24/7 is not a preference. There is a switch at the battery that I turn off, but this does not solve the problem.
Thanks for some suggestions!
There are parasitic loads such as smoke detectors, CO detectors, LP detectors, radio keep-alive memory. All operate off of the 12-volt system. Normally these are powered 24/7/365 until the battery goes dead.

The solution is a suitable switch to disconnect the solar system even though it is covered, and a suitable switch to disconnect the batteries thus removing the parasitic loads.

Must remember to turn the battery switch ON FIRST and then turn the solar switch ON last. And solar OFF first and battery OFF last.

The breakers are for 120-volt systems. Turning off the converter breaker will also prevent the battery from charging. At this point, I would prefer to keep shore power connected, as I do, all of the time. Problem solved.

Bob
Bob K4TAX is offline   Reply With Quote
Old 04-23-2024, 11:07 AM   #13
Junior Member
 
Join Date: Mar 2021
Location: Sierra Foothills of California
Posts: 25
Thanks to all for your replies! As always, there is more than solution.
MrCampALot is offline   Reply With Quote
Old 04-23-2024, 01:09 PM   #14
Senior Member
 
Join Date: Apr 2020
Posts: 722
Get a smart shunt so you know exactly what your batteries are doing at any one moment.
__________________
2019 F150 HDPP 4X4 3.5. 2500lb payload.
2018 Rockwood 2506
Half Ton Heavy is offline   Reply With Quote
Old 04-24-2024, 11:45 AM   #15
Senior Member
 
Join Date: May 2018
Location: Hills of Northwestern PA
Posts: 2,389
Quote:
Originally Posted by Half Ton Heavy View Post
Get a smart shunt so you know exactly what your batteries are doing at any one moment.
Or get Bluetooth connected batteries. I bought and installed a cheap shunt. I consider it wasted effort & $$. At the time I had a non Bluetooth battery in the bank. Iíve since replaced it so all batteries are matching. If I need to rewire my system, Iíll remove it.
__________________
2019 Cherokee Wolf Pup 16BHS flipped axle, 5K springs, 400AH LiFePO4, 3K inverter, 400 watts CIGS solar
2019 Ford F-150 S-Crew 5.5 bed V8 w/tow package, ITBC, Tow Mirrors, SumoSprings, 1990#CC
Husky Centerline TS WDH 400-600# spring bars
Boomerweps is offline   Reply With Quote
Reply

Tags
drain, question

Thread Tools
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


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 12:39 PM.