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09-13-2021, 06:19 AM #1
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Higher Capacity DIY Lithium Batteries.
For those adventurous souls who may be planning on making your own LiFePo4 battery bank from cells purchased direct from China, here is some good news...
It seems like the new standard capacity has increased from 280ah to 304ah. This should (literally) give you a little more "Bang" for your Buck!!!
Taking a quick look around AliExpress I found these cells sold as sets of four with free shipping for $630 - $650.
That is equivalent to paying $150 for a Battle Born battery. That is a very good deal and it beats the cost of AGM or even flooded Lead Acid batteries.
Of course, you will need to build the battery(ies) yourself and provide the proper Battery Management System (BMS), but the value proposition for these batteries is really incredible.
Good Luck to those adventurous enough to tackle this project and please let us know how your projects turned out.
PS: If these batteries were available when I built my system, I would have definitely built my battery bank using these LiFePo4 cells.David and Peggy
2019 Ford F350 Lariat, 6.7L Diesel, Dually, Long Bed
Running with 20k Reese Goosebox (Love It) and Ford Factory "Puck" system.
Stopping with 8,000 lb Disc Brakes and Titan Hydraulic over Electric Brakes system.
Powering all this fun with 1200 Watts of Solar, two Tesla, Model S, battery modules, 24 volt Victron Inverter.
2018 Solitude 310 GK
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09-13-2021, 03:54 PM #2
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- Aug 2019
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- Lexington, KY
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I just finished my battery pack build and installation with 280 Ah cells. Wound up costing me right at $750 with the cells, BMS, cables and battery box. Was very easy to build (at least for me). Installing in the passthru was a little harder due to rerouting wires but still only took about a 1/2 day.
2018 Imagine 2500RL
2016 F150 with 3.5L Ecoboost
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09-13-2021, 08:18 PM #3
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- Mar 2019
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David and Peggy
2019 Ford F350 Lariat, 6.7L Diesel, Dually, Long Bed
Running with 20k Reese Goosebox (Love It) and Ford Factory "Puck" system.
Stopping with 8,000 lb Disc Brakes and Titan Hydraulic over Electric Brakes system.
Powering all this fun with 1200 Watts of Solar, two Tesla, Model S, battery modules, 24 volt Victron Inverter.
2018 Solitude 310 GK
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09-14-2021, 05:21 PM #4
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I'm about to look into this again. I already have cases that are sized to work with four Lishen 272Ah cells, so I need to make sure whatever I end up getting will fit.
Current: 2021 Transcend 261BH, 2019 Ford F250 SRW SWB CC 6.2 - Picture
Previous: 2016 Jayco X213, 2014 F150 EB 3.5
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09-14-2021, 06:03 PM #5
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Here is a video comparing the new 304 ah (EVE) cells with the previous 280ah cells (along with a very good capacity test). The new 304ah cells are the same size, only a little bit taller ( ~ 1/8 inch).
Here is the video link: https://www.youtube.com/watch?v=tbNl9ZpvCsY&t=1271sDavid and Peggy
2019 Ford F350 Lariat, 6.7L Diesel, Dually, Long Bed
Running with 20k Reese Goosebox (Love It) and Ford Factory "Puck" system.
Stopping with 8,000 lb Disc Brakes and Titan Hydraulic over Electric Brakes system.
Powering all this fun with 1200 Watts of Solar, two Tesla, Model S, battery modules, 24 volt Victron Inverter.
2018 Solitude 310 GK
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09-14-2021, 06:23 PM #6
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- Mar 2020
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- ON & QC Canada
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I should be ready to start this project come Feb/Mar. Really looking forward to it.
Sent from my SM-P610 using TapatalkSteph & Lise
2019 F150 Lariat 2.7 EB
2020 Imagine XLS 22MLE
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10-01-2021, 09:02 AM #7
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- Mar 2019
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Update (10/1/21):
I just ran across this advertisement for CATL batteries that are 320ah (310ah nominal) for only $679 with Free Shipping (with a Guaranteed Delivery Date or they are free).
The good thing about these cells is that you know that CATL is the largest LFP battery supplier and they make quality cells.
Here is the link if anyone is interested...
https://www.aliexpress.com/item/1005...d03f617e8fc967David and Peggy
2019 Ford F350 Lariat, 6.7L Diesel, Dually, Long Bed
Running with 20k Reese Goosebox (Love It) and Ford Factory "Puck" system.
Stopping with 8,000 lb Disc Brakes and Titan Hydraulic over Electric Brakes system.
Powering all this fun with 1200 Watts of Solar, two Tesla, Model S, battery modules, 24 volt Victron Inverter.
2018 Solitude 310 GK
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10-04-2021, 12:24 PM #8
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Hi David,
I'm new to this so could use a little advice. I have 2 FLA batteries in my 303RLS. I am interested in going LFP, my assumptions are that 4 LFP's give me 12.8ish VDC and 320ah (far more than my 170ah). What kind of BMS would I need ? I believe I have one in the pass thru that goes thru start-up routine when plugged into shore power or generators. My goal is to get rid of FLAs and, eventually tie some range of solar charging into it was well.
Thank you in advance for your help,
MikeLast edited by MikenKerri; 10-04-2021 at 02:52 PM.
Mike & Kerri
2019 Reflection 303 RLS
2018 Chevy Siiverado Z71 2500 HD Duramax CC SB 4WD
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10-04-2021, 05:28 PM #9
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Hello,
Do you have any pics if your build? What BMS did you use, and is one really needed? I think we have a power management system (we bought our rig used, so nit sure). I did have problems charging and powering with a generator and so I consulted here (but can't find the post) and was told generators had either a floating neutral or floating ground, dont remember which, but the solution was to get a replacement male plug and to connect the ground and neutral with a jumper wire inside the plug. Of course it worked, I wish I could find that post but no luck.
So, I'm interested if I also need a BMS in addition to the "PMS".
Thanks,
MikeMike & Kerri
2019 Reflection 303 RLS
2018 Chevy Siiverado Z71 2500 HD Duramax CC SB 4WD
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10-04-2021, 08:41 PM #10
Hi Mike,
I think I can answer your BMS question. The BMS (Battery Management System) is only for the battery and not to be confused with an EMS (Energy Management System). The EMS manages your rig from an electrical usage standpoint. The BMS manages your battery. It makes sure no charging takes place beyond the acceptable temperature parameters as well as output.
Hope that helps.
Bill2019 GMC 3500 SRW Sierra Denali Duramax
2020 Reflection 315RLTS
rack and pinion slide horizontal...
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